JP3447631B2 - Non-drilling pipe burial method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-open cutting pipe burying method used for pipe burying work, and more particularly to a non-open cutting pipe burying method which can cope with various ground conditions and is excellent in terms of construction period and construction cost.

[0002]

2. Description of the Related Art Conventionally, pipe laying works for water and sewage, power lines, communication lines, gas, etc. are excavated from the ground surface to the pipe burying position, except for special works such as passing under tracks or waterways. It has been done as excavation work. However, in recent years, there has been a strong demand for reducing the environmental load associated with construction work, shortening the construction period, and eliminating traffic disruptions due to the excavation of roads. Various non-excavation construction methods are also available to meet these demands. It is like this. An example of such a non-open cutting pipe burying method is shown in FIGS. 6 and 7. FIG. 6 is an explanatory view of an excavation state with a drill head in a conventional non-excavation pipe burying method and an explanatory view of a diameter expansion reamer mounting state, and FIG. 7 is an explanation of an expansion state in a conventional reamer for non-excavation pipe burying method. It is a figure and a burial completion state explanatory drawing of a flexible tube.

In each of the above figures, the conventional non-excavation pipe burying method is to insert a tubular drill rod 12 having a drill head 11 for excavation attached to the tip thereof into the ground 30 from the ground or starting shaft 31 serving as an excavation start point. Then, the drill rod 12 is propelled and rotated to advance in the ground, and the drill head 11 is reached to the reaching shaft 32 which is the end point of excavation at a predetermined distance, and then the drill head 11 is replaced with the reaching shaft 32. The diametrical expansion reamer 13 having a substantially conical shape is connected to the drill rod 12, the tip of the pipe material 20 for embedding is attached to the diametrical expansion reamer 13, the drill rod 12 is retreated and rotated, and the excavation hole formed by the excavation is performed. The diameter of the pipe 33 is expanded by the reamer 13 for expanding the diameter, and the pipe material 20 is inserted into the expanded drill hole 33.

The diameter expanding reamer 13 is formed as a substantially conical body having a bottom diameter larger by a predetermined dimension than the outer diameter of the pipe material 20 to be buried, and one or a plurality of spirals are provided on the outer surface of the substantially conical body on the tip end side. Grooves are formed, and ejection holes 13a for ejecting a fluid for drilling (muddy water as a lubricant or polymer liquid) are respectively provided at a plurality of predetermined positions of the spiral groove, and the drill rod 12 is attached to the tip. While being connected, the tubing material 20 for burying is connected to the bottom side via a predetermined connecting means 14 (see FIG. 2).

Next, the pipe burying work by the above-mentioned conventional non-open cutting pipe burying method will be described. First, a starting shaft 31 and a reaching shaft 32 are formed by excavating at both end positions of a planned pipe burial site, and then a predetermined drilling fluid is used as a primary drilling hole from a predetermined position on the ground in the vicinity of the starting shaft 31.
1 While discharging from the tip, drill rod 12 is ground 3
Insert at 0. Drill head 1 at the tip of the drill rod 12
In No. 1, while excavating while unraveling the soil in the ground, an excavation hole 33 filled with the excavation fluid discharged from the tip is formed in the rear.

When the drill head 11 reaches the pre-prepared reaching shaft 32 as the end point of excavation, the drill head 11 is removed from the tip of the drill rod 12 and the drilling hole 33 is expanded to a predetermined diameter if necessary. To do. After this, a diameter-expanding reamer 13 having a diameter larger than the outer diameter of the pipe material 20 to be embedded and adapted for retracting the pipe material is attached to the tip and the drill rod 1.
(2) The tip end of the pipe material 20 to be embedded in the diameter expansion reamer 13 is attached via the connecting means 14 while being integrally connected to the drill rod 12 by connection with the tip end. Then, as the secondary drilling and the drawing of the pipe material, the diameter expansion reamer 13 is discharged while discharging the drilling fluid from the outer surface of the diameter expansion reamer 13 on the tip side.
When the drill rod 12 is pulled in while rotating and rotating the soil around the excavation hole 33 formed by the primary drilling, the diameter of the hole 33 is expanded to the diameter of the pipe material 20 or more and the pipe material 20 is inserted into the hole. .

When the diameter expansion reamer 13 and one end of the pipe material 20 reach the starting shaft 31 and the insertion of the pipe material 20 is completed, the diameter expansion reamer 13 is separated from the pipe material 20 and the drill rod 1
2 were all pulled up and remained in each shaft, overflowing excavated soil,
The construction is completed by removing the drill rod 12 and the diameter expansion reamer 13 while treating the muddy water. As described above, in the conventional non-open cutting pipe burying method, the environment of the pipe burying place is minimally changed, and the excavation / backfilling site reaches the vertical shaft 32.
Since it requires only a small amount of work, the amount of construction can be significantly reduced compared to the case where a long construction period such as test drilling / excavation, pipe laying, backfilling / paving restoration was required in the past.
There is no need to consider curing after backfilling, and the construction period can be greatly shortened. In addition, the area that requires restoration of ground surface structures such as pavements and the amount of excavated sediment that requires temporary storage and movement can be greatly reduced, which can reduce costs for the entire construction and the frequency of movement of sediment and excavation work. Along with the decrease, the load on the surrounding environment can be significantly reduced. Furthermore, since most of the burying work can be done from the ground, it is easy to ensure the safety of the construction.

[0008]

Since the conventional non-open cutting pipe burying method has been carried out as described above, when the pipe material 20 is pulled into the ground 30, the pipe material 20 slides in the excavation hole 33 to move to the ground 30. Cause friction between. Under a favorable condition that the earth pressure is not so high and the drilling fluid can sufficiently exist around the pipe material 20, the friction between the pipe material 20 and the ground 30 is small, and the pipe material 20 can be retracted relatively smoothly.
Depending on the state of the ground 30 to be buried, the friction resistance increases when the pipe 20 is pulled into the ground 30 for a predetermined length or more, and the pulling-in force of the drill rod 12 is increased, and the pulling-in is further advanced. There is a possibility that it will be lost, and the distance that the pipe 20 can be buried by one time of drawing is limited. If the construction section is longer than this distance, a series of drilling and pipe drawing work will be required multiple times, There was a problem that the efficiency decreased.

The present invention has been made to solve the above-mentioned problems, and reduces frictional resistance between the pipe material and the ground so that the pipe material can be smoothly inserted into most of the ground, and the embedding distance is sufficiently long. It is an object of the present invention to provide a non-open-cutting pipe burying method capable of improving the efficiency of the entire burial work.

[0010]

A method for burying a non-excavated pipe according to the present invention is an excavation formed by inserting a drill rod having a drill head mounted at its tip into the ground and advancing to a digging end point separated by a predetermined distance. For the hole, after the excavation end point, the drill head at the tip of the drill rod is replaced with a reamer for diameter expansion, and the tip of the pipe material for embedding is attached to the reamer for diameter expansion through a predetermined connecting means. In the non-excavation pipe burying method in which the pipe material is inserted into the expanded drilling hole while the drilling hole is expanded by the reamer for expanding the diameter, the connecting means generates vibration. Means is integrally added, and the pipe material is vibrated by the vibration of the vibrating means. As described above, in the present invention, the vibrating means is integrally arranged in the connecting means for connecting the diametrical expansion reamer and the pipe material, and the pipe material in the ground is vibrated when the diameter expansion reamer expands and the pipe material is retracted. By doing so, it is possible to prevent the surrounding ground from adhering to the pipe material, promote the infiltration of the drilling fluid between the pipe material and the ground, and reduce the frictional resistance between the pipe material and the ground. The limit that can be pulled in the pipe material without breaking at the same time has expanded, and the burying distance can be set longer by one time of pulling in the pipe material.
By reducing the number of series of operations for drilling and drawing pipe material in the construction section, it is possible to significantly shorten the construction period and cost of the burying work. In addition, the loss of force due to frictional resistance is reduced, the propulsion efficiency of the pipe material is improved, and the retracting force of the drill rod can be suppressed to a low level, which reduces energy consumption during retracting and reduces working costs.

Further, the non-excavation pipe burying method according to the present invention, if necessary, excavates formed by inserting a drill rod having a drill head attached to the tip into the ground and advancing to an excavation end point separated by a predetermined distance. For the hole, after the excavation end point, the drill head at the tip of the drill rod is replaced with a reamer for diameter expansion, and the tip of the pipe material for embedding is attached to the reamer for diameter expansion through a predetermined connecting means. In the non-excavation pipe burying method in which the pipe material is inserted into the expanded drilling hole while expanding the drilling hole with the reamer for expanding the diameter, the vibrating part has a vibrating part. One or a plurality of vibrating means for transmitting the vibration to the contacted object that contacts with is movably arranged inside the pipe material, and the vibration of the vibrating means vibrates the pipe material. As described above, in the present invention, the vibrating means is movably disposed inside the pipe material, and when the diameter is expanded by the diameter expansion reamer and the pipe material is retracted,
By vibrating the underground pipe material with the vibration of the vibrating means,
It prevents the surrounding ground from adhering to the pipe material and promotes the penetration of the drilling fluid between the pipe material and the ground, reducing the frictional resistance between the pipe material and the ground. The range of pipes that can be pulled in is expanded, and the burial distance can be set longer by a single pull-in of pipes, and the number of series of drilling and pipe pull-in operations in the construction section is reduced, greatly shortening the burial period. And the cost can be reduced. Further, the loss of force due to the frictional resistance is reduced, the propulsion efficiency of the pipe material is improved, and the retracting force of the drill rod can be suppressed to a low level, so that energy consumption during retracting can be reduced and working cost can be reduced. in addition,
When the vibrating means is moved, vibration is generated from the inside of the pipe material at the location where the frictional resistance is the largest and the pipe material is vibrated, so that the frictional resistance can be reduced more reliably and the pulling force of the pipe material can be reduced.

Further, the non-open cutting pipe burying method according to the present invention has, if necessary, a vibrating vibrating portion, and another vibrating portion or a plurality of vibrating portions for transmitting the vibration to the contacted object in contact with the vibrating portion. The means is arranged movably inside the pipe material, and the vibrating means also vibrates the pipe material with the other vibrating means. As described above, in the present invention, the vibrating means is additionally arranged at a predetermined position inside the pipe material, and vibration is generated from at least two places with respect to the underground pipe material to surely vibrate a wider range of the pipe material. By further improving the adhesion prevention effect of the surrounding ground to the pipe material and the infiltration promotion effect of the fluid for excavation between the pipe material and the ground, it is possible to significantly reduce the friction resistance between the pipe material and the ground, Pipes can be smoothly drawn into any ground, and the efficiency of burial work can be improved. Further, by moving the vibrating means, vibration is generated from the inside of the pipe material at the location having the largest frictional resistance to vibrate the pipe material, and the frictional resistance can be reduced more reliably and the pulling force of the pipe material can be reduced.

In the non-excavation pipe burying method according to the present invention, other vibrating means for generating vibration is externally attached to the pipe material, if necessary, at the excavation end point position which is the entrance of the pipe material to the ground. The pipe material is vibrated by contact. As described above, in the present invention, the vibrating means is additionally provided at a position immediately before the pipe material enters the ground, and vibration is generated from at least two points with respect to the pipe material in the ground to ensure a wider range of the pipe material. By vibrating the pipe, the performance of preventing adhesion of the surrounding ground to the pipe material and the effect of promoting the infiltration of the drilling fluid between the pipe material and the ground are further enhanced, and the friction resistance between the pipe material and the ground is significantly increased. It is possible to reduce the number of pipes, and the pipe material can be smoothly drawn into any ground, and the efficiency of burial work can be improved.

Further, in the non-open cutting pipe burying method according to the present invention, vibrations of different frequencies are generated by the respective vibrating means as needed, and one or a plurality of predetermined positions of the pipe material are respectively vibrated by the vibrating means. Is vibrated at a predetermined frequency and a predetermined amplitude that are different from the vibration frequency. As described above, in the present invention, the vibration frequencies of the plurality of vibrating means are made different from each other, and the predetermined vibration different from any of the two vibrating means that causes one or a plurality of predetermined positions of the tubular material by the resonance of each vibration. By setting the state, if there is a part of the ground where frictional resistance against the pipe material is large, an appropriate vibration state is given to the corresponding position of the pipe material, and the pipe material does not necessarily need to be uniformly vibrated. Can be smoothly drawn into the ground, the output of the vibrating means can be suppressed and the cost can be reduced, and a reliable vibrating part can be set regardless of the position of the vibrating means, and the freedom of layout of the vibrating means is great. Becomes
There are few restrictions on the burial work, and workability can be improved.

Further, in the non-open cut pipe burying method according to the present invention, the vibration frequency of each of the vibrating means is controlled to a different predetermined value, if necessary, so that the pipe material has a predetermined vibration frequency and a predetermined vibration frequency. This is to continuously displace a portion vibrating with amplitude in the longitudinal direction of the pipe material. Thus, in the present invention,
By adjusting the vibration in each of the vibrating means to a different predetermined frequency, the vibration state of the pipe material, by making the portion in the predetermined vibration state based on resonance continuously grow in the longitudinal direction of the pipe material, The friction state of the pipe material with respect to the ground in each of the half cycle of vibration of the pipe material in one longitudinal direction of the pipe material and the other half cycle of vibration in the other longitudinal direction of the pipe material is made different from each other, and Can generate propulsion in either direction,
When the direction of this propulsive force and the retracting direction of the drill rod are matched, the frictional resistance between the pipe material and the ground becomes extremely small, and the pipe material can be inserted and buried in the ground with a small pulling force.
The efficiency of burial work can be dramatically improved and the construction cost can be significantly reduced.

Further, the non-open cutting pipe burying method according to the present invention controls the vibration frequency of each of the vibrating means to different predetermined values, if necessary, so that the predetermined portion of the pipe material appearing on the ground. The amplitude at is zero. As described above, in the present invention, the vibrations in the respective vibrating means are adjusted to different predetermined frequencies, and the node position at which the vibration amplitude of the pipe material caused by the resonance of the respective vibrations becomes 0 is located at the specific portion on the ground. By not vibrating the pipe material on this specific part of the ground, it is possible to improve the work efficiency by making this specific part non-vibrating when performing some work on the specific part of the pipe material on the ground. By setting the joint of pipes to a vibration-free portion when adding, it is possible to perform continuous joint work while pulling even in the ground with high resistance, greatly improving the efficiency of burial work, and the entire construction period. Can be shortened.

Further, in the non-open cut pipe burying method according to the present invention, the diameter expanding reamer is integrally provided with a vibrating means for generating vibration, and the vibration is generated by the vibration of the vibrating means. To do. Thus, in the present invention, the reamer for expanding the diameter is integrally provided with the vibrating means, and the reamer for expanding the diameter is vibrated at the time of expanding the diameter by the reamer for expanding the diameter and retracting the pipe material. In addition to preventing the surrounding ground from adhering to the diameter expansion reamer, it also promotes the penetration of the drilling fluid between the diameter expansion reamer and the ground to increase the friction resistance between the diameter expansion reamer and the ground. As a result, the diameter can be expanded more smoothly, and the diameter expansion work can be performed smoothly even when burying pipe material in any ground, and the loss of force due to frictional resistance is reduced to promote the diameter expansion reamer. The efficiency can be improved and the pulling force of the drill rod can be further reduced.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment of the Invention) A non-excavation pipe burying method according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an explanatory view of a pipe material retracted state in the non-open cutting pipe burying method according to the present embodiment, and FIG. 2 is a diameter expansion state explanatory diagram of a diameter expansion reamer in the non-open cutting pipe burying method according to the present embodiment. .

As shown in each of the above figures, the non-open cutting pipe burying method according to the present embodiment is, in addition to the above-mentioned conventional non-open cutting pipe burying method, a connecting means for connecting the diameter expansion reamer 13 and the pipe member 20. A vibrating portion (not shown) as a vibrating means for generating vibration is disposed inside the expander chuck 14a of 14 and the outer periphery of the pipe material 20 exposed from the ground 30 on the reaching shaft 32 side, A vibrating device 15 for generating vibration is attached as another vibrating means, and the excavation hole 3 formed in the ground
When the reamer 13 for diameter expansion and the drawing of the pipe material 20 are performed with respect to 3, vibration is generated from the connecting means 14 and the vibrating device 15, and the pipe material 20 is inserted into the expanded drill hole 33 while vibrating. It is to go.

The connecting means 14 is a mechanism for vibrating the pipe member 20 by vibrating the vibrating portion inside the expander chuck 14a. For this vibrating portion, electric power, air pressure, Alternatively, hydraulic pressure or the like is supplied from a predetermined supply source on the side of the reaching shaft 32 through an electric wire or a pipe extending outside the pipe material 20. The electric wire or pipe can be connected to the vibration unit through the inside of the pipe material 20.

The vibrating device 15 includes the ground 30 of the pipe material 20.
It is a mechanism that is mounted around the exposed portion of the pipe and transmits vibrations to the pipe material 20 while allowing the movement of the pipe material 20 with the progress of insertion into the ground 30. Next, the pipe burying work by the non-open cutting pipe burying method according to the present embodiment will be described. Similarly to the above-mentioned conventional method, after starting and forming the starting shaft 31 and the reaching shaft 32 at both end positions of the planned pipe burying position, a predetermined drilling fluid as a primary drilling hole is drilled from a predetermined position on the ground in the vicinity of the starting shaft 31. The drill rod 12 is inserted into the ground 30 while being discharged from the tip. The drill head 11 at the tip of the drill rod 12 excavates while unraveling the earth and sand to form a drill hole 33 in the rear.

When the drill head 11 reaches the reaching shaft 32 at the end point of excavation, the drill head 11 is removed from the tip of the drill rod 12 and the drill hole 33 is expanded to a predetermined diameter if necessary, and then buried. The diameter of the reamer 13 is larger than the outer diameter of the pipe material 20 and is suitable for retracting the pipe material.
2 and the pipe member 2 to the reamer 13 for expanding the diameter.
The 0 end is attached via the connecting means 14. Further, the vibrating device 15 is attached to the pipe member 20 in the reaching shaft 32.

Thereafter, as secondary drilling and pipe material drawing, the diameter expansion reamer 13 is rotated while discharging the drilling fluid from the outer surface of the diameter expansion reamer 13 on the tip end side, and the primary drilling hole is formed. When the drill rod 12 is pulled in while unraveling the soil around 33, the drill hole 33 is expanded to the diameter of the pipe material 20 or more, and the pipe material 20 is inserted into the drill hole 33.

While the pipe material 20 is being inserted into the excavation hole 33, the vibrating portion inside the expander chuck 14a and the vibrating device 15 on the reaching shaft 32 side are vibrated respectively to vibrate the pipe material 20 in the ground to a predetermined vibration. It vibrates uniformly with a number. Tubing 20
By vibrating, it is possible to prevent the surrounding ground 30 from being in close contact with the pipe material 20, and to promote the intrusion of the drilling fluid between the pipe material 20 and the ground 30, thereby making it possible to prevent the drilling fluid from entering between the pipe material 20 and the ground 30. Pipe material 20 that reduces frictional resistance and increases frictional resistance
It is possible to prevent a state in which it is impossible to pull in.

When the reamer 13 for expanding the diameter and one end of the pipe material 20 reach the starting shaft 31 and the insertion of the pipe material 20 is completed, the generation of vibration in the connecting means 14 and the vibrating device 15 is stopped,
The diameter expanding reamer 13 is separated from the pipe material 20 and all the drill rods 12 are pulled up to treat residual or overflowing excavated soil, muddy water, etc. in each shaft, while the drill rod 12, the diameter expanding reamer 13, and a vibrating device. Construction will be completed if 15 etc. are removed.

As described above, in the non-excavation pipe burying method according to the present embodiment, the vibrating portion is integrally provided in the connecting means 14 for connecting the diametrical expansion reamer 13 and the pipe member 20, and the pipe member 20 The vibrating device 15 is arranged at a position immediately before entering the ground 30, and when the diameter is expanded by the diameter expansion reamer 13 and the pipe 20 is retracted, vibration is generated from two locations at both ends of the underground portion of the pipe 20. By vibrating the pipe material 20 as a whole, it is possible to prevent the surrounding ground 30 from adhering to the pipe material 20, and
The penetration of the drilling fluid between the pipe material 20 and the ground 30 can be promoted, and the frictional resistance between the pipe material 20 and the ground 30 can be significantly reduced.
0 can be smoothly drawn in, the limit of pipe material retraction without breakage in the middle is widened, and the burying distance by one retraction of the pipe material 20 can be set longer, so that drilling and pipe material retraction in the construction section can be performed. The number of series of operations can be reduced to improve the efficiency of burial work. Moreover, the propulsion efficiency of the pipe member 20 is improved by reducing the frictional resistance, and the drill rod 1
The retraction force of No. 2 can be suppressed to a small value, and the energy consumption at the time of retraction can be reduced to reduce the work cost.

(Second Embodiment of the Present Invention) Second Embodiment of the Present Invention
The non-excavation pipe burying method according to the embodiment will be described with reference to FIG. FIG. 3 is an explanatory view of the usage state of the self-propelled vibration exciter in the non-open cut pipe burying method according to the present embodiment. As shown in FIG. 3, in the non-open cutting pipe burying method according to the present embodiment, the inside of the pipe material 20 is moved as a vibrating means instead of the vibrating section arranged in the connecting means 14 in the first embodiment. When using the possible self-propelled vibration exciter 16 to expand the diameter of the excavation hole 33 by the diameter expansion reamer 13 and retract the pipe material 20,
Vibration is generated from the self-propelled vibrating device 16 and the vibrating device 15, and the pipe material 20 is vibrated and inserted into the enlarged excavation hole 33.

The self-propelled vibrating device 16 has a constitution in which a vibrating unit 16b is attached to a self-propelled vehicle 16a used as a part of a well-known in-pipe construction robot. It is a mechanism that moves to a predetermined inner position, vibrates the vibration unit 16b at that position, and transmits vibration to the outer pipe member 20 to vibrate the pipe member 20. Next, the pipe burying work by the non-open cutting pipe burying method according to the present embodiment will be described. The formation of the excavation hole 33 as the primary drilling hole in the ground 30 and the connection of the diameter expansion reamer 13 and the pipe member 20 to the drill rod 12 at the reaching shaft 32 are the same as those in the first embodiment. Connection means 1 at one end
The self-propelled vibrator 15 is attached to the pipe member 20 attached to the diameter expansion reamer 13 via the pipe member 20 from the other end side of the pipe member 20.
The vibration device 15 is inserted into the inside, moved inside to be positioned at a predetermined position of the pipe material 20, and the vibrating device 15 is attached to the outer periphery of the pipe material 20 in the reaching shaft 32.

Thereafter, for secondary drilling and pipe material drawing, the diameter-expanding reamer 13 is rotated while discharging the drilling fluid from the tip-side outer surface of the diameter-expansion reamer 13 as in the first embodiment. When the drill rod 12 is retracted while unraveling the earth and sand around the drill hole 33 formed by the primary drilling, the drill hole 33 is expanded to a diameter of the pipe material 20 or more,
The pipe material 20 is inserted into the excavation hole 33. This drill hole 3
While the pipe material 20 is being inserted into 3, the self-propelled vibration generator 16 and the vibration device 15 on the side of the reaching shaft 32 are vibrated to uniformly vibrate the pipe material 20 in the ground at a predetermined frequency.

However, in the ground 30, there may be a specific portion where the frictional resistance with the pipe material 20 is large, such as a bent portion of the excavation hole 33 or a portion where the earth pressure is locally high due to the soil quality. When the pipe material 20 reaches such a specific location, the self-propelled vibration exciter 16 is moved to a predetermined portion of the pipe material 20 in contact with the particular location, and the self-propelled vibration exciter 16 is vibrated at this location to cause the pipe material 20 to move. Direct transmission of vibration, pipe material 20
Vibrate. By vibrating the pipe material 20 with respect to the ground 30 without damping, the friction resistance is reliably reduced, and the pipe material 20 can smoothly pass through this specific portion. The self-propelled vibration exciter 16 gradually moves in the pipe material 20 in the direction opposite to the advancing direction in accordance with the movement of the pipe material 20 as the pipe material 20 is inserted, and during the pipe material retraction, the pipe material 20 corresponding to the specific location of the ground 30 is moved. It should be placed in a predetermined area.

When the reamer 13 for expanding the diameter and one end of the pipe material 20 reach the starting shaft 31 and the insertion of the pipe material 20 is completed, the vibration generation in the self-propelled vibrating device 16 and the vibrating device 15 is stopped, and self-propelled. The vibration device 16 is collected from the other end of the pipe material 20.
Further, similarly to the first embodiment, the diametrical expansion reamer 13 is separated from the pipe material 20 and all the drill rods 12 are pulled up, and the drill rod 12, the diametrical expansion reamer 13, the vibration device 15 and the like are removed. If the construction is completed.

As described above, in the non-open cutting pipe burying method according to the present embodiment, the self-propelled vibration exciter 16 is movably arranged inside the pipe material 20, and the diameter of the pipe material 20 is increased by the diameter expansion reamer 13. At the time of pulling in, the self-propelled vibrating device 16 is positioned at a predetermined portion of the pipe material 20 and vibrated, and the predetermined portion of the pipe material 20 can be directly vibrated. Therefore, it is possible to ensure that the friction resistance with the pipe material 20 in the ground 30 is large. The pipe material 20 can be vibrated, the vibration damping can be suppressed, the frictional resistance can be efficiently reduced, and the retracting force of the pipe material 20 can be further reduced, and the embedding distance can be set longer by retracting the pipe material 20 once. Therefore, the number of series of work for drilling and pipe drawing in the construction section can be reduced to improve the efficiency of burial work.

In the non-open cutting pipe burying method according to the above-mentioned embodiment, the self-propelled vibrator 16 is inserted into the pipe member 20 from the beginning of drawing the pipe member 20 to vibrate, but the invention is not limited to this. At the beginning of pulling in the pipe material 20, only the vibration device 15 is used without inserting the self-propelled vibration device 16 into the pipe material 20, and after the pipe material 20 is pulled into the ground 30 to some extent to increase the frictional resistance, the self-propelled vibration device. 16 may be inserted from the other end of the pipe material 20 and moved to a predetermined position of the pipe material 20 to generate vibration.

Further, in the non-open cutting pipe burying method according to each of the first and second embodiments, vibration is generated at each of the connecting means 14 or the self-propelled vibrating device 16 and the vibrating device 15. Although it is configured to generate and vibrate the pipe material 20, in addition to this, for the ground 30 having a property that the vibration of the pipe material 20 is not easily attenuated, the connecting means 14 or the self-propelled vibration device is used without using the vibration device 15. Tubular material 2 in only 16 places
It is also possible to adopt a configuration in which vibration is generated in 0, and as in the above-described respective embodiments, the underground portion of the pipe material 20 is vibrated to generate the pipe material 2.
The frictional resistance between 0 and the ground 30 can be reduced.

(Third Embodiment of the Present Invention) Third Embodiment of the Present Invention
The non-open cutting pipe burying method according to the embodiment will be described with reference to FIG. FIG. 4 is an explanatory view of a pipe material retracting state in the non-open cutting pipe burying method according to the present embodiment. As shown in FIG. 4, in the non-open cutting pipe burying method according to the present embodiment, the vibrating section of the connecting means 14 and the vibrating device 15 in the first embodiment generate vibrations of different frequencies. ,
One or a plurality of predetermined positions of the pipe member 20 are vibrated at a predetermined frequency and a predetermined amplitude based on the resonance of each vibration.

Next, the pipe burying work by the non-open cutting pipe burying method according to the present embodiment will be described. Forming a drill hole 33 in the ground 30 as a primary drilling hole, and a reamer 13 for expanding the diameter of the drill rod 12 and the pipe material 2 in the reaching shaft 32.
The process up to the connection of 0 and the start of retraction of the diameter expansion reamer 13 and the pipe 20 by the drill rod 12 are the same as in the first embodiment.

When the vibrating portion inside the expander chuck 14a and the vibrating device 15 on the reaching shaft 32 side are respectively vibrated at different predetermined frequencies, one or a plurality of the pipe members 20 are resonated due to the resonance of each vibration in the pipe member 20. A given position may oscillate with an amplitude significantly greater than the amplitude of each individual vibration. Utilizing this phenomenon, the drill hole 3
While the pipe material 20 is being inserted into 3, the bent portion of the excavation hole 33 (see FIG. 4; range A), the portion where the earth pressure is locally high due to the soil (see FIG. 4; range B), etc. Tubing 2
With respect to the ground 30 having one or a plurality of specific points where the frictional resistance with 0 is large, one or a plurality of predetermined portions of the pipe member 20 contacting the specific points by adjusting the frequencies of the two vibrating means respectively. Make a large amplitude vibration state. By vibrating the pipe material 20 by increasing the amplitude with respect to the ground 30, it is possible to reliably reduce the frictional resistance and allow the pipe material 20 to smoothly pass through this specific portion. The respective vibration frequencies of the vibrating section and the vibrating device 15 are gradually displaced in the pipe material 20 in the direction opposite to the advancing direction in accordance with the movement of the pipe material 20 as the pipe material 20 is inserted, and the The large amplitude position is appropriately adjusted so as to coincide with the specific portion of the ground 30.

When the reamer 13 for expanding the diameter and one end of the pipe material 20 reach the starting shaft 31 and the insertion of the pipe material 20 is completed, vibrations in the connecting means 14 and the vibration exciter 15 are performed as in the first embodiment. The generation is stopped, the diameter expansion reamer 13 is separated from the pipe material 20, all the drill rods 12 are pulled up, and residual drilled soil, overflowing excavated soil, muddy water, etc. are treated in each shaft, while the drill rod 12 and the diameter expansion reamer are treated. 13, vibration device 1
Construction will be completed if 5th grade is removed.

As described above, in the non-open-cutting pipe burying method according to the present embodiment, the oscillating portion of the connecting means 14 and the oscillating device 1 are used at the time of expanding the diameter by the diameter expanding reamer 13 and retracting the pipe 20.
5 and 5 are vibrated at different frequencies, and one or a plurality of predetermined positions of the pipe material 20 can be vibrated at a predetermined vibration state, for example, with a large amplitude by resonance of different vibrations. It is possible to vibrate the pipe material 20 by matching the large amplitude position to the position where
The frictional resistance can be efficiently reduced, the pulling force of the pipe material 20 can be further reduced, and a large amplitude vibration can be generated at a predetermined position of the pipe material 20 by resonance, so that each vibrating means has a smaller output. It is possible to further reduce the cost of burial work.

In the non-open cutting pipe burying method according to the above-mentioned embodiment, the vibrating portion of the connecting means 14 and the vibrating device 1 are used.
A configuration in which two vibrating means 5 are vibrated at different frequencies to cause any portion of the pipe material 20 to have a predetermined vibration state by resonance, and the predetermined vibration state portion is displaced at the same speed as the insertion progress of the pipe material 20. However, in addition to this, the vibration frequency of each vibrating means is controlled to another different predetermined value, and a predetermined vibration state of the pipe material due to the resonance of the vibration, for example, a portion having a large amplitude is the longitudinal direction of the pipe material. It is also possible to adopt a configuration in which a beat state in which the tubular member 20 is continuously displaced at a speed faster than the insertion progress of the tubular member 20 is obtained, and a half cycle of vibration in one direction of the longitudinal direction of the tubular member 20 and a vibration in the other direction in the longitudinal direction Since the frictional states of the pipe material 20 with respect to the ground 30 in the respective half cycles are different from each other, the vibrating pipe material 20 is different from the ground material 30 in the same manner as a so-called vibration actuator. Will have a driving force for any orientation of the longitudinal direction, the propulsion direction and the drill rod 12
If the pull-in directions of the pipes are the same, the pipe material 20 and the ground 30
It is possible to make the frictional resistance to and extremely small, and to insert the pipe 20 into the ground 30 with a small pulling force to bury it, and it is possible to miniaturize the construction equipment used for pulling in, while there is a margin in the frictional resistance. , It is possible to drastically increase the efficiency of burial work, such as the ability to draw in a larger diameter pipe, and to significantly reduce construction costs.

Further, in the non-open cutting pipe burying method according to the above-mentioned embodiment, the vibrating portion of the connecting means 14 and the vibrating device 1 are used.
The two vibrating means 5 are vibrated at different frequencies so that any portion of the pipe material 20 is brought into a predetermined vibrating state by resonance. In addition to this, the vibrating frequency of each vibrating means is different. Can be adjusted to different predetermined values of 0 to obtain a state in which the node position of amplitude 0 based on the resonance of each vibration is located at a predetermined position of the exposed portion of the pipe material 20 on the ground. By not vibrating the pipe material 20, when performing some work on a specific portion of the pipe material 20 on the ground, the work efficiency can be improved by keeping this specific portion in a non-vibrating state.
Construction of the ground 30 which has a large frictional resistance and needs to vibrate the pipe material 20 by setting the joint portion of the pipe material 20 to a vibration-free portion when adding another pipe material 20 to 0 by welding, heat fusion, or the like. Also in the above, continuous joining work while pulling in the pipe material 20 is possible, the efficiency of the burying work is significantly improved, and the period of the entire work can be shortened.

Further, in the non-open cutting pipe burying method according to each of the first to third embodiments, the vibrating means is arranged at each position to vibrate the pipe material 20, but in addition to this, The diameter expansion reamer 13 may also be configured to have a vibrating means integrally incorporated therein. By vibrating the diameter expansion reamer 13 at the time of expanding the diameter by the diameter expansion reamer 13 and retracting the pipe material 20, the diameter expansion reamer 13 is expanded. In this case, it is possible to prevent the surrounding ground 30 from closely contacting the diameter expansion reamer 13 and to promote the intrusion of the drilling fluid between the diameter expansion reamer 13 and the ground 30 to increase the diameter expansion reamer 13 and the ground. It is possible to reduce the frictional resistance between the reamer 30 and the reamer 13 for diametrically expanding the diameter of the tubing material 20 and smoothly expand the diameter of the tubing 20 regardless of the type of the ground 30. Can improve the propulsion efficiency of the drill rod 1 More can be further reduced retraction force.

Further, in the non-open cutting pipe burying method according to each of the first and third embodiments, an electric wire or pipe for supplying electric power, hydraulic pressure or the like to generate vibration at the vibration part of the connecting means 14. Is arranged along the outside of the pipe material 20 or through the inside of the pipe material 20, but the invention is not limited to this, and the swivel portion 14 of the front drill rod 12 and the connecting means 14 is not limited to this.
It is also possible to adopt a configuration in which electric power or hydraulic pressure is supplied to the vibrating section through b to generate vibration.

Further, in the non-excavation pipe burying method according to each of the first to third embodiments, the starting shaft 31 is previously excavated at the excavation start point, and the reaching shaft 32 is excavated at the excavation end point. Although these are set as the start point and the end point of the pipe burial, the present invention is not limited to this, and the burial work can be performed without providing the starting shaft 31 and / or the reaching shaft 32, which is vacant during the burial period. By not forming the vertical shaft from the beginning, the curing period after backfilling is almost unnecessary, the construction period can be further shortened, and the strength of the ground after the construction can be greatly increased. When this vertical shaft is not formed, the drill rod 12 is inserted into the ground 30 from a predetermined position on the ground which is an excavation start point to excavate, and the drill rod 12 reaches a predetermined position on the ground which is an end point of the excavation. By retracting and burying the pipes, as shown in FIG. 5, the start point and the end point of the embedded portion of the pipe material 20 are located on the ground when the retracting is completed. Further, small slopes 34 for smoothing the entrance and exit of the drill rod 12 and the pipe material 20 with respect to the ground can be formed at the excavation start point and the excavation end point (see FIG. 5). This slope 34
Even if it is provided, it has almost no effect on the strength of the ground compared to the vertical shaft, and the strength of the temporary hole closing state at the time of construction interruption is also high,
There is little effort for temporary closing work. After the pipe 20 is retracted and buried, the ground 30 is drilled downward near the start point and the end point of the buried portion to expose the pipe 20, where the pipe 20 is cut, and another pipe 20 is cut at this cut portion. And the pipe 20 is directly connected to another pipe 20 which is buried in advance. On the other hand, a concrete hand hole or the like is embedded in the drilled portion to construct a pipe connection hole for accommodating the end of the pipe material 20, or the pipe is backfilled as it is. To do.

[0045]

As described above, according to the present invention, the vibrating means is integrally disposed in the connecting means for connecting the reamer for expanding the diameter and the pipe material, and when the reamer for expanding the diameter expands and the pipe material is retracted. By vibrating the pipe material in the ground, the surrounding ground is prevented from adhering to the pipe material, and the penetration of the drilling fluid between the pipe material and the ground is promoted, resulting in friction between the pipe material and the ground. Since the resistance can be reduced, the limit of pipe material retraction without breakage in the middle expands, the burial distance can be set longer by one time of pipe material retraction, and a series of drilling and pipe material retraction operations in the construction section. By reducing the number of times, it is possible to significantly shorten the construction period of burial work and reduce costs. In addition, the loss of force due to frictional resistance can be reduced to improve the propulsion efficiency of the pipe material, and the retracting force of the drill rod can be suppressed to a small level, which reduces the energy consumption during retracting and reduces the working cost. Have.

Further, according to the present invention, the vibrating means is movably arranged inside the pipe material, and the pipe material in the ground is vibrated by the vibration of the vibrating means when the diameter is expanded by the diameter expansion reamer and the pipe material is retracted. By doing so, it is possible to prevent the surrounding ground from adhering to the pipe material, promote penetration of the drilling fluid between the pipe material and the ground, and reduce the frictional resistance between the pipe material and the ground. The limit of pipe material retraction without breakage is expanded, the burial distance can be set longer by one time of pipe material retraction, and the number of series of drilling and pipe material retraction operations in the construction section can be reduced to reduce burial work. This has the effect of significantly reducing the construction period and cost. Furthermore, the loss of force due to frictional resistance is reduced, the propulsion efficiency of the pipe material is improved, and the pulling force of the drill rod can be suppressed to a small level, which reduces the energy consumption at the time of pulling and reduces the working cost. Have. In addition, the effect that the vibrating means is moved to generate vibration from the inside of the pipe material at the location with the largest frictional resistance to vibrate the pipe material, and the frictional resistance can be reduced more reliably and the pulling force of the pipe material can be reduced. Have.

Further, according to the present invention, a vibrating means is additionally provided at a predetermined position inside the pipe material, and vibrations are generated from at least two locations with respect to the underground pipe material to ensure a wider range of the pipe material. By vibrating the pipe, the performance of preventing adhesion of the surrounding ground to the pipe material and the effect of promoting the infiltration of the drilling fluid between the pipe material and the ground are further enhanced, and the friction resistance between the pipe material and the ground is significantly increased. It is possible to reduce the number of pipes, the pipe material can be smoothly drawn into any ground, and the efficiency of the burying work can be improved. Further, by moving the vibrating means, vibration is generated from the inside of the pipe material at the location with the largest frictional resistance to vibrate the pipe material, and there is an effect that the frictional resistance can be reduced more reliably and the pulling force of the pipe material can be reduced. .

Further, according to the present invention, the vibrating means is additionally provided at a position immediately before the pipe material enters the ground, and vibration is generated from at least two places in the pipe material in the ground to widen the pipe material. By vibrating the area reliably, the performance of preventing the surrounding ground from adhering to the pipe material and the effect of promoting the infiltration of the excavating fluid between the pipe material and the ground are further enhanced, and the friction resistance between the pipe material and the ground is further enhanced. The effect is that the pipe material can be pulled in smoothly on any ground, and the efficiency of burial work can be improved.

Further, according to the present invention, the vibration frequencies of the plurality of vibrating means are made different from each other, and the vibrating means is different from any of the two vibrating means which causes one or a plurality of predetermined positions of the tubular material by resonance of each vibration. By setting a predetermined vibration state,
When a part of the ground has a large frictional resistance against the pipe material, an appropriate vibration state is given to the corresponding position of the pipe material, and the pipe material is pulled into the ground smoothly without necessarily vibrating the entire pipe material uniformly. It is possible to suppress the output of the vibrating means and reduce the cost, and to set the vibrating part reliably regardless of the position of the vibrating means, which increases the freedom of the layout of the vibrating means and limits the burying work. There is little effect, and workability can be improved.

Further, according to the present invention, the vibration in each of the vibrating means is adjusted to a different predetermined frequency, and the vibration state of the pipe material becomes a predetermined vibration state based on the resonance in the longitudinal direction of the pipe material. By making the beating state to move continuously, the friction state of the pipe material with respect to the ground in each of the half cycle of vibration of the pipe material in one longitudinal direction of the pipe material and the other half cycle of vibration in the other longitudinal direction of the pipe material By making them different from each other, it is possible to generate a propulsive force in the vibrating pipe material in either direction of the longitudinal direction of the pipe material.If the direction of this propulsive force and the pull-in direction of the drill rod are matched, the pipe material and the ground The frictional resistance of the pipe is extremely small, and it is possible to insert the pipe material into the ground and bury it with a small retraction force, which has the effect of dramatically improving the efficiency of burial work and significantly reducing the construction cost. That.

Further, according to the present invention, the vibrations in the respective vibrating means are adjusted to different predetermined frequencies, and the node position at which the vibration amplitude of the pipe material caused by the resonance of the respective vibrations becomes 0 is specified on the ground. By positioning it in a part and not vibrating the pipe material in this specific part on the ground, when doing some work on the specific part of the ground material of the pipe material, the work efficiency can be improved by making this specific part non-vibrating,
In particular, when connecting multiple pipes, by setting the joints between pipes to non-vibration parts, it is possible to perform continuous splicing work while pulling even in the ground with high resistance, and the efficiency of burial work is greatly improved. It has the effect of shortening the entire construction period.

Further, according to the present invention, the reamer for expanding the diameter is integrally provided with the vibrating means, and the reamer for expanding the diameter is vibrated at the time of expanding the diameter by the reamer for expanding the diameter and retracting the pipe material. When the diameter is increased, the surrounding ground is prevented from adhering to the reamer for expansion, and the penetration of the drilling fluid between the reamer for expansion and the ground is promoted, and the reamer for expansion and the ground are expanded. Since the frictional resistance can be reduced, the diameter expansion progresses more smoothly, and it is possible to perform the diameter expansion work smoothly even when burying pipe material in any type of ground, and reduce the loss of force due to friction resistance for diameter expansion. The propulsion efficiency of the reamer can be improved, and the pulling force of the drill rod can be further reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view of a pipe material retracted state in a non-open cutting pipe burying method according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a diameter expansion state in the diameter expansion reamer in the non-open cutting pipe burying method according to the first embodiment of the present invention.

FIG. 3 is an explanatory view of a usage state of a self-propelled vibration exciter in a non-open cutting pipe burying method according to a second embodiment of the present invention.

FIG. 4 is an explanatory view of a pipe material retracted state in a non-open cutting pipe burying method according to a third embodiment of the present invention.

FIG. 5 is an explanatory view of a pipe material retracted state in the non-open cutting pipe burying method according to another embodiment of the present invention.

FIG. 6 is an explanatory view of an excavation state using a drill head and a mounting state of a reamer for diameter expansion in a conventional non-excavation pipe burying method.

FIG. 7 is an explanatory view of a diameter expansion state in a diameter expansion reamer according to a conventional non-open cutting pipe burying method and an explanatory view of a flexible tube burying completion state.

[Explanation of symbols]

11 drill head 12 drill rod 13 Diameter expansion reamer 13a ejection hole 14 Connection means 14a Expander chuck 14b swivel part 15 Vibration device 16 Self-propelled vibration device 16a self-propelled vehicle 16b Excitation unit 20 pipe material 30 ground 31 Starting shaft 32 reaching shaft 33 drill holes 34 Slope

Continuation of the front page (56) References JP-A-11-223277 (JP, A) JP-A-2-91394 (JP, A) JP-A-63-142189 (JP, A) Actual development Sho-51-16913 (JP , U) Japanese Patent Publication 4-32193 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/06 E21D 9/08

Claims (8)

(57) [Claims] 1. A drill at the tip of the drill rod at the end point of drilling, with respect to a drill hole formed by inserting a drill rod with a drill head mounted at the tip into the ground and advancing to a finish point at a predetermined distance. After exchanging the head for a diameter expansion reamer and attaching the tip of the pipe material for embedding to the diameter expansion reamer through a predetermined connecting means, the drill rod is retracted and the diameter of the excavation hole is expanded by the diameter expansion reamer. In the non-open cutting pipe burying method in which the pipe material is inserted into the enlarged drilling hole, the connecting means is integrally added with a vibrating means for generating vibration, and the vibrating means vibrates. A non-open cutting pipe burying method, characterized in that the pipe material is vibrated by. 2. A drill at the tip of the drill rod at the drilling end point, for a drilling hole formed by inserting a drill rod with a drill head mounted at the tip into the ground and advancing to a drilling end point separated by a predetermined distance. After exchanging the head for a diameter expansion reamer and attaching the tip of the pipe material for embedding to the diameter expansion reamer through a predetermined connecting means, the drill rod is retracted and the diameter of the excavation hole is expanded by the diameter expansion reamer. In the non-excavation pipe burying method in which the pipe material is inserted into the enlarged drilling hole while having a vibrating vibrating portion, one or a plurality of vibrating parts are transmitted to the contacted object in contact with the vibrating portion. A non-open cutting pipe burying method, characterized in that a vibrating means is movably disposed inside the pipe material, and the pipe material is vibrated by the vibration of the vibrating means. 3. The non-open-cutting pipe burying method according to claim 1, further comprising: a vibrating vibrating portion, and another vibrating means for transmitting the vibration to a contacted object in contact with the vibrating portion. Is movably disposed inside the pipe material, and the pipe material is vibrated even by the other vibrating means. 4. The non-excavation pipe burying method according to any one of claims 1 to 3, wherein another vibrating means for generating vibration at the excavation end point position which is an entrance to the ground of the pipe material. A non-open cutting pipe burying method, characterized in that the pipe is vibrated by contacting the outside of the pipe. 5. The non-open cutting pipe burying method according to claim 3 or 4, wherein vibrations having different frequencies are generated by each of the vibrating means, and one or a plurality of predetermined positions of the pipe material are vibrated. A non-cutting pipe burying method characterized by vibrating at a predetermined frequency different from the frequency of the means and a predetermined amplitude. 6. The non-drilling pipe burying method according to claim 5, wherein the vibration frequencies of the vibrations in each of the vibrating means are controlled to different predetermined values, and the predetermined vibration frequency and the predetermined amplitude of the pipe material. A non-excavation pipe burying method characterized by continuously displacing the part that vibrates in the longitudinal direction of the pipe material. 7. The non-excavation pipe burying method according to claim 5, wherein the vibration frequencies of the respective vibration means are controlled to different predetermined values, respectively, and a predetermined portion of the pipe material that appears on the ground is exposed. A non-open cutting pipe burying method characterized by setting the amplitude to 0. 8. The non-excavation pipe burying method according to any one of claims 1 to 7, wherein the reamer for expanding the diameter is integrally provided with a vibrating means for generating vibration. A non-open cutting pipe burying method characterized by vibrating due to the vibration of