JP2004190780A - Protection structure of underground buried pipe and execution method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protection structure which materializes miniaturization, cost reduction and reduction of execution time by simplifying a structure, and an execution method thereof. <P>SOLUTION: The protection structure contains piping 51 buried in a ground 50, a protection member 52 which is buried in the upper side of the piping 51 to support vertical load acting on the piping 51 from the ground 50 on the upper side of the piping 51, and a pile 53 for supporting the protection member 52. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a protection structure and a construction method for an underground pipe, and more particularly to a protection structure and a construction method for an underground pipe suitable for burying a pipe in a ground subsidence zone.
[0002]
[Prior art]
If the pipe is buried underground, the weight of soil acting on the pipe may damage the pipe. Therefore, conventionally, as described below, a pipe called a culvert or a sheath pipe is buried in the ground, and the pipe is inserted into the pipe to protect the pipe.
[0003]
FIG. 7 shows a method of protecting the pipe 11 with the culvert 10. In this case, the box-shaped culvert 10 is buried in the ground, and the pipe 11 is inserted into the culvert 10 to protect the pipe 11 from the load of the soil 13. Reference numeral 12 in FIG. 7 denotes a pile that supports the culvert 10.
[0004]
FIG. 8 shows a method of protecting the pipe 11 by the sheath pipe 14. In this case, a sheath pipe 14 having a larger diameter than the pipe 11 is buried in the soil 13, and the pipe 11 is inserted into the sheath pipe 14.
[0005]
[Problems to be solved by the invention]
However, in the conventional method of protecting the pipe 11 with the culvert 10 or the sheath pipe 14, the pipe 11 is protected from the load acting in the entire circumferential direction of the pipe 11 by the culvert 10 or the sheath pipe 14. There has been a problem that the pipe 14 becomes large, the cost increases, and the construction period also becomes long.
[0006]
In particular, when the pipe 11 is buried in the ground subsidence zone, it is necessary to increase the strength of the culvert 10 or the sheath pipe 14 because the vertical earth pressure acting as an external force on the pipe 11 (particularly the protruding earth pressure of Marston) is large. In addition, there is a problem that the culvert 10 or the sheath tube 14 is further increased in size and cost is increased.
[0007]
The present invention has been made in view of such a problem, and it is an object of the present invention to provide a method for protecting underground pipes and a method for constructing an underground pipe capable of shortening a construction period, while reducing the size and cost of a protective member. I do.
[0008]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
[0009]
That is, the gist of the present invention is that only the load in the vertical direction among the loads from the soil acting on the underground pipe is received by the protection member.
[0010]
The present invention relates to a pipe buried in soil, a flat protection member buried above the pipe and supporting a load acting on the pipe from soil above the pipe, and a pile supporting the protection member And characterized in that:
[0011]
According to the present invention, since only the vertical load acting on the pipe from the soil above the pipe is supported by the protection member, the configuration of the protection member can be simplified and downsized, thereby reducing costs and reducing the construction period. Shortening becomes possible. In particular, the present invention is suitable for a case where a pipe is buried in a ground subsidence zone.
[0012]
Here, a plurality of the pipes can be provided.
[0013]
Further, the present invention provides a step of driving piles on both sides of a position where a pipe is to be buried in the ground, a step of excavating a position where the pipe is to be buried to form a space, and an upper side of the pile. A step of attaching a protection member for supporting a vertical load acting on the pipe from the soil above the pipe above a position where the pipe is to be buried, and disposing the pipe at a predetermined position in the space. And a step of backfilling the soil in the space.
[0014]
The steps described above can be combined with each other without departing from the gist of the present invention.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
(1st Embodiment)
FIG. 1 shows a first embodiment of the present invention. Here, a pipe 51 buried in the soil 50 and a protection member 52 buried above the pipe 51 and supporting a vertical load acting on the pipe 51 from the soil 50 above the pipe 51 are provided. . In this example, only one pipe 51 is provided, but a plurality of pipes 51 may be provided as described later.
[0016]
The protection member 52 can be formed of steel, resin, wood, or the like into any shape. Here, the protection member 52 is formed in a long plate shape having a width b larger than the diameter of the pipe 51.
[0017]
The protection member 52 has at least the strength necessary to support the soil 50 on the upper side. The protection member 52 is supported by a plurality of piles 53 embedded on both sides of the pipe 50.
[0018]
As shown in FIG. 2, the pipe 51 is suspended by a substantially U-shaped suspension member 54 attached to the lower surface of the protection member 52. A gap is provided between the protection member 52 and the pipe 51. This gap need not be provided.
[0019]
As described above, according to the present invention, the soil 50 above the pipe 51 buried in the soil 50 is supported by the protection member 52, and therefore, of the loads acting on the pipe 50 from the soil 50, only the vertical load Is received by the protection member 52.
[0020]
Since this vertical load accounts for a large proportion of the load acting on the soil 50, the load acting on the pipe 51 from the soil 50 becomes very small by supporting the vertical load with the protection member 52. Therefore, damage to the pipe 51 can be prevented.
[0021]
Further, since the protection member 52 only supports the load in the vertical direction due to the soil 50, that is, the weight of the soil 50 on the protection member 52, the protection member 52 can be reduced in size to a simple shape such as a flat plate. Thereby, the cost of the protection member 52 can be reduced, and the construction period can be shortened.
[0022]
In particular, even when the vertical earth pressure acting as an external force on the pipe 51 (especially the protruding earth pressure of Marston) is large, such as when the pipe 51 is buried in the ground subsidence zone, the protection member 52 bears this vertical earth pressure. Therefore, it is possible to prevent the pipe 51 from being damaged.
(2nd Embodiment)
FIG. 3 shows a second embodiment of the present invention. Here, the support plate 55 is disposed below the protection member 52. The support plate 55 is fixed to the piles 53 on both sides. The pipe 51 is disposed on the support plate 55 and is fixed to the support plate 55 by a fixing band 56.
[0023]
In this case, even when the weight of the pipe 51 is large, the pipe 51 can be reliably held by the support plate 55. The support plate 55 can have the same length as the pipe 51, but a shorter one can be intermittently or continuously arranged.
(Third embodiment)
FIG. 4 shows a third embodiment of the present invention. In the above embodiment, the case where one pipe 51 is embedded has been described. However, as shown in FIG. 4, a plurality of pipes 51a and 51b can be embedded.
[0024]
In this example, two pipes 51 a and 51 b are placed in parallel on the support plate 55 in the horizontal direction, and are fixed by fixing bands 56 respectively. In this case, the diameters of the pipes 51a and 51b can be the same or different.
[0025]
The three or more pipes 51a, 51b,... Can be arranged and fixed on the support plate 55.
[0026]
In this manner, by arranging the plurality of pipes 51a, 51b... In a line in the horizontal direction, the depth of excavating the soil 50 for embedding the pipes 51, 51b. .
(Fourth embodiment)
FIG. 5 shows a fourth embodiment of the present invention. Here, two pipes 51a and 51b are arranged in a line in the vertical direction. In FIG. 5, the pipes 51a and 5b are arranged in an overlapping manner, but a gap can be provided between the pipes 51 and 51b. Further, three or more pipes 51a, 51b,... Can be arranged in a line in the vertical direction.
[0027]
By arranging the plurality of pipes 51a, 51b... In a line in the vertical direction, the installation space for the pipes 51a, 51b.
(Fifth embodiment)
FIG. 6 is a flowchart illustrating the present invention. Here, a case where the third embodiment (see FIG. 3) is applied will be described as an example.
[0028]
First, a pile 53 is cast at a predetermined position in the soil 50 (step 1). Next, a space is formed by excavating the position where the pipe 51 is to be buried (step 2). Next, the support plate 55 is attached to the pile 53 (step 3).
[0029]
Subsequently, the pipe 51 is arranged on the support plate 55 and fixed with the fixing band 56 (Step 4). Next, after attaching the protection member 52 to the stake 53 (step 5), the soil 50 is backfilled in the space formed by the excavation (step 6).
[0030]
The steps 1 to 5 can be combined with each other without departing from the gist of the present invention.
[0031]
【The invention's effect】
In the present invention, of the loads acting on the pipe from the soil around the pipe buried in the middle, only the load in the vertical direction is supported by the protection member, so that the configuration of the protection member can be simplified and downsized, and the cost can be reduced. And the construction period can be shortened. In particular, even when the pipe is buried in the ground subsidence zone, the pipe can be protected from a vertical load.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a side view showing the first embodiment of the present invention.
FIG. 3 is a side view showing a second embodiment of the present invention.
FIG. 4 is a side view showing a third embodiment of the present invention.
FIG. 5 is a side view showing a fourth embodiment of the present invention.
FIG. 6 is a flowchart showing a fifth embodiment of the present invention.
FIG. 7 is a perspective view showing a conventional example.
FIG. 8 is a perspective view showing another conventional example.
[Explanation of symbols]
50 Soil 51, 51a, 51b Piping 52 Protection member 53 Pile 54 Suspension member 55 Support plate 56 Fixed band

Claims (3)

Pipes buried in the soil,
A protection member buried above the pipe and supporting a vertical load acting on the pipe from soil above the pipe,
And a stake for supporting the protection member. The underground pipe protection structure according to claim 1, wherein a plurality of the pipes are provided. A process of driving piles on both sides of the underground pipe where the pipes should be buried,
Excavating a position where the pipe is to be buried to form a space,
Above the position where the pipe is to be buried on the upper side of the pile, attaching a protection member that supports a vertical load acting on the pipe from the soil above the pipe,
Arranging the pipe at a predetermined position in the space;
Burying the soil in the space.

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