JP2012219574A - Method and apparatus for burying concrete pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an operation of burying a concrete pile in accordance with various soil conditions, and lower a construction cost.SOLUTION: This method for burying the concrete pile comprises: setting a press-fitting device T that can press and lower a concrete pile K by using a plurality of chuck members 18 of a chuck mechanism 17 that is provided so as to be freely elevated and lowered, at a top face of a ground S that is a portion in which the concrete pile K is placed; providing a support mechanism 31 for supporting a drilling device 30 suspended by a wire 33 of a crane to the press-fitting device T; and selectively conducting an operation of pressing the concrete pile K by using the chuck mechanism 17 and an operation of drilling by using the drilling device 30.

Description

  The present invention relates to a concrete pile embedding method and apparatus for embedding a concrete pile in the ground.

Conventionally, a rotary press-fitting method in which a casing or a steel pipe pile is press-fitted while being gripped and rotated by a chuck mechanism is known (see Patent Document 1).
Conventionally, a pile burying method by a pre-boring method using a large device having a mast is known (see Patent Document 2).

JP 2008-202370 A JP 2009-243186 A

Among the above-mentioned known examples, the former is popular where uniform soil is widely distributed up and down. In such a case, the work is temporarily stopped, a large device is carried in, and the rework is performed by the pre-boring method.
Moreover, even if it is a rotary press-fit method, since it press-fits while rotating a pile, the apparatus becomes large-sized and makes the work on a narrow field difficult.
In addition, in the case of the rotary press-fitting method, if the press-fitting is performed while rotating the concrete pile, the concrete pile may be damaged, and the concrete pile has been buried by the pre-boring method.
Among the known examples, the latter pre-boring method can excavate even in the presence of an obstacle in the soil, so the problem of the former known example is solved. However, in the pre-boring method, a large screw auger with a leader is used. And the use of a concrete pile driving machine, the construction cost increases, and there is a problem that large equipment cannot be carried in a narrow construction site.
Although the present application is a press-fitting device that embeds a concrete pile, it enables excavation by a drilling device so that the press-fitting work and the excavation work can be selected. It is designed to facilitate the burial work.

According to the first aspect of the present invention, a press-fitting device T capable of press-fitting and lowering the concrete pile K by a plurality of chuck members 18 of the chuck mechanism 17 provided to be movable up and down is installed on the upper surface of the ground S where the concrete pile K is installed. The press mechanism T is provided with a support mechanism 31 for supporting the excavator 30 suspended from the wire 33 of the crane, and the press-in operation of the concrete pile K by the chuck mechanism 17 and the excavator operation of the excavator 30 are selected. This is a concrete pile burying method.
The invention of claim 2 is provided with a press-fitting device T capable of press-fitting and lowering the concrete pile K by a plurality of chuck members 18 of the chuck mechanism 17 provided to be movable up and down on the upper surface of the ground S where the concrete pile K is installed. When the concrete pile K cannot be press-fitted by the press-fitting device T due to a ground fault in the ground S, the concrete pile K of the press-fitting device T is replaced with the excavator 30, and the excavator 30 is moved by the support mechanism 31 of the press-fitting device T. After excavating the ground S in support and removing the soil obstacles in the ground S, the excavating device 30 of the press-fitting device T and the concrete pile K are replaced, and the concrete pile burying in which the concrete pile K is press-fitted by the press-fitting device T It is a method.
According to a third aspect of the present invention, the excavator 30 is configured by providing a casing 41 on the outer periphery of an auger 37 driven and rotated by a rotation drive mechanism 36 in a case 35, and an upper portion of the excavator 30 is connected to a wire 33 of a crane. The excavator 30 is provided in a guide groove 43 of the support mechanism 31 provided in the press-fitting device T, or is supported by the support mechanism 31 configured by the chuck mechanism 17 by friction. This is a concrete pile burying method in which excavation is performed while supporting the reaction force against the rotational force of the auger 37 of the excavator 30 by engaging and supporting the rail member 42 on the outer periphery of the casing 41.
The invention of claim 4 is configured such that the support mechanism 31 supports the reaction force by engaging the rail member 42 on the outer periphery of the casing 41 of the excavator 30 with the guide groove 43 provided in the press-fitting device T. The guide groove 43 is inserted into the insertion hole 46 of the guide member 45 detachably provided above the insertion hole 16 of the chuck frame 15 of the press-fitting device T or the chuck at a location corresponding to the rail member 42 of the casing 41. A concrete pile formed in the chuck member 18 of the mechanism 17 is embedded.
The invention of claim 5 includes a base frame 1 installed on the upper surface of the ground S where the concrete pile K is installed, and a chuck frame 15 having a chuck mechanism 17 that moves up and down by a press-fit cylinder 10 with respect to the base frame 1. A support mechanism 31 is provided on the chuck frame 15 side to support the excavator 30 suspended by a separately prepared wire 33. The support mechanism 31 is a rail provided on the outer periphery of the casing 41 of the excavator 30. A concrete pile embedded by forming the guide groove 43 in the chuck member 17 of the chuck mechanism 17 at a location corresponding to the rail member 42 of the casing 41 or the guide member 45 provided with the guide groove 43 engaged with the member 42. It is a device.

In the invention of claim 1 and claim 2, since the concrete pile K is press-fitted by the press-fitting device T, the concrete pile K can be buried without damaging it, the working noise can be reduced, and the construction cost can be reduced.
In addition, even if there is a ground fault, the excavation device 30 can be attached to the press-fitting device T instead of the concrete pile K, and the excavation work of the concrete pile K can be completed without interruption. In this respect, the construction cost can be reduced.
Moreover, since the excavator 30 can be supported by the press-fitting device T and excavation work can be performed, before the concrete pile K is lowered and press-fitted by the press-fitting device T, obstacles in the soil can be removed in advance, and the excavator 30 can be combined efficiently. Can do.
Moreover, the excavator 30 can be operated while suspended by a crane that does not have a mast, enables construction on a small site, and eliminates the need to carry in and use unnecessary large-sized equipment, thereby reducing the construction cost. it can.
Furthermore, since the press-fitting device T press-fits the concrete pile K without rotating it, it is not necessary to provide a rotation mechanism in the press-fitting device T. In this respect, too, the small press-fitting device T can be used for work in a narrow field. It can be made possible and the construction cost can be reduced.
In invention of Claim 3, the operation | work by the excavation apparatus 30 suspended with the crane is realizable.
In the invention of claim 4, the excavator 30 can be easily supported, and several kinds of guide members 45 of the guide groove 43 are prepared and selectively used, or the position of the chuck member 18 is changed. By doing so, the excavator 30 having a different diameter can be used.
In invention of Claim 5, the press-fit apparatus T which can be pressed in without rotating the concrete pile K can be provided, the press-fit apparatus T can be embed | buried without damaging the concrete pile K, work noise is reduced, and construction cost Since the press-fitting device T can also perform excavation work by the excavator 30, the concrete pile K can be buried regardless of the presence or absence of subsidence, and the overall work can be simplified. Costs can be reduced.

The press-fitting state diagram of the concrete pile by the press-fitting device. The excavation state figure which used a press-fitting device and a drilling device together. The top view of a press-fit apparatus. The side view of a drilling rig. The press-fit state figure of the concrete pile of the other Example by a press-fit apparatus. The excavation state figure of the other Example which used the press-fitting device and the excavation device together. The top view of the other Example of a press-fit apparatus. The side view of the other Example of excavation equipment. FIG. The top view and side view of an example of a support mechanism. Sectional drawing of the closed state of the chuck mechanism of a press-fit apparatus. Sectional drawing of the open state of the chuck mechanism of a press-fit apparatus.

An example of an apparatus capable of carrying out the method of the present invention will be described below with reference to the drawings.
Reference numeral 1 denotes a base frame of a press-fitting device T for press-fitting a concrete pile K made of concrete into the ground S. The base frame 1 is formed in a long square shape in plan view, and is provided with upper and lower cylinders 2 at four corners. The upper and lower cylinders 2 correct the front / rear / left / right inclination of the base frame 1 to bring the base frame 1 into a substantially horizontal state. A receiving member 3 for the rod 4 of the upper and lower cylinders 2 is grounded on the upper surface of the ground S.

  A substantially rectangular opening 5 penetrating vertically is formed at the left and right intermediate position of the base frame 1, and weights 6 are placed and fixed on the upper surfaces of the left and right sides of the opening 5. The weight 6 is set so as to be equal to or greater than the reaction force when the concrete pile K is press-fitted due to its weight.

  A press-fit cylinder 10 is provided on the base frame 1 around the opening 5. In the press-fit cylinder 10, a base portion of the cylinder 12 is attached to a support 11 fixed to the base frame 1, and a chuck frame 15 is attached to a rod 13 of the press-fit cylinder 10. A circular insertion hole 16 is provided at the center of the chuck frame 15, and a chuck mechanism 17 is provided in the insertion hole 16 for fastening and fixing (chucking) the concrete pile K inserted through the insertion hole 16.

  The chuck mechanism 17 is provided with a plurality of chuck members 18 that enter and exit toward the center of the insertion hole 16. Although the configuration of the entrance / exit mechanism for allowing the chuck member 18 to enter and exit is arbitrary, in this embodiment, each chuck member 18 is made to enter / exit by the chuck cylinder 19. 20 is a rod of the chuck cylinder 19, and 21 is a hydraulic piping member of the chuck cylinder 19.

The press-fitting device T inserts a concrete pile K into the insertion hole 16 of the chuck frame 15 in a state where the rod 13 of the press-fitting cylinder 10 is contracted, and tightens and fixes the rod 13 of the press-fitting cylinder 10 with the chuck mechanism 17. It is extended, the chuck frame 15 is lowered, and the concrete pile K is press-fitted into the ground S.
On the chuck frame 15 side, a support mechanism 31 for supporting a separately prepared excavator 30 is provided.

  Therefore, even if the excavator 30 is simply suspended from the wire 33 of the crane, the reaction force of the excavator 30 is supported by the support mechanism 31 provided in the press-fitting device T, so that excavation work can be performed.

  That is, during the press-fitting work of the concrete pile K by the press-fitting device T, if there is an underground trouble due to the presence of conglomerate or the like in the ground S, the concrete pile K is once pulled out and excavated by the support mechanism 31 of the press-fitting device T. What is necessary is just to press-fit the concrete pile K again by the press-fitting device T after supporting the apparatus 30 and removing a soil obstacle by excavation work of the excavating device 30.

The excavator 30 may have any configuration as long as excavation work can be performed. For example, the upper attachment portion 32 provided on the upper portion of the excavator 30 is connected to an arm portion (not illustrated) of a crane (not illustrated). Is hung on the hook 34 of the wire 33 that hangs down. A rotation drive mechanism 36 is provided in the case 35 of the upper attachment portion 32, and an upper portion of the rotation shaft 38 of the auger 37 is attached to the rotation drive mechanism 36, and an excavation head 39 is provided at the lower portion of the auger 37. A casing 41 is provided on the outer periphery of the auger 37, and the upper portion of the casing 41 is fixed to the upper mounting portion 32.
Reference numeral 40 denotes a hydraulic hose that transmits power to the rotation drive mechanism 36.

  The support mechanism 31 that supports the excavating device 30 is constituted by the chuck mechanism 17 of the chuck frame 15, and the outer periphery of the casing 41 of the excavating device 30 is fastened and fixed by the chuck mechanism 17, and the excavating device 30 is caused by the friction force of the tightening and fixing. The reaction force at the time of excavation work is supported (see FIGS. 1 to 4, 11, and 12).

  The casing 41 is provided with a rail member (key protrusion) 42 that is parallel to the axial direction of the casing 41 and protrudes outward in the radial direction with the same dimension from the beginning to the end. The rail member 42 is provided on the chuck frame 15 side. The guide mechanism (key groove) 43 is engaged to support the reaction force against the rotational force of the auger 37 of the excavator 30, and the support mechanism 31 may be configured by the rail member 42 and the guide groove 43 (FIG. 5 to 10).

  In the embodiment, a guide member 45 having a guide groove 43 is provided above the insertion hole 16 of the chuck frame 15. The guide member 45 is formed with a circular insertion hole 46 through which the casing 41 of the excavator 30 is inserted, and the guide groove 43 is formed at a location corresponding to the rail member 42 of the casing 41 on the inner periphery of the insertion hole 46. (FIG. 10).

  In this case, several types of guide members 45 are prepared with different diameters of the insertion holes 46, widths of the guide grooves 43, and the like, and are selectively used.

  11 and 12 show another embodiment of the support mechanism 31, and the guide groove 43 is formed in the chuck member 18 of the chuck mechanism 17 at a location corresponding to the rail member 42 of the casing 41. A support mechanism 31 is configured.

  9 and 10, a pair of the rail member 42 and the key groove 43 is provided, but in FIG. 11 and FIG.

(Operation of Example)
The soil quality of the ground S where the concrete pile K is buried is investigated by so-called boring, and if there is no conglomerate or the like that obstructs the work, the ground S is press-fitted above a predetermined position where the concrete pile K is buried. The apparatus T is installed, the concrete pile K is attached to the chuck mechanism 17 of the insertion hole 16 of the chuck frame 15 of the press-fitting apparatus T, the chuck frame 15 is lowered to the predetermined depth by the press-fitting cylinder 10, and then First, the chuck mechanism 17 is once separated from the concrete pile K, the chuck frame 15 is raised to the uppermost position, the concrete pile K is again gripped by the chuck mechanism 17 and press-fitted by the press-in cylinder 10, and this operation is repeated. Then, the concrete pile K is press-fitted to a predetermined depth.

  Therefore, if the work is in the ground S where there is no conglomerate or the like that obstructs the work, the concrete pile K can be press-fitted by the press-fitting device T, and the excavation process by the excavator 30 or the driving process to drive the concrete pile K by the hammer, etc. Can be omitted, and the work process is remarkably simplified.

  In addition, the press-fitting work by the press-fitting device T omits a hammering step and the like, and therefore the work noise is significantly reduced.

  In addition, the press-fitting work of the concrete pile K of the press-fitting device T is made by press-fitting the concrete pile K only by expansion and contraction of the press-fitting cylinder 10 and press-fitting the concrete pile K without rotating, so that no torsional load is applied to the concrete pile K. Preventing breakage such as cracks, the concrete pile K can be buried smoothly and reliably.

  Therefore, even in the ground S, which has been found to have no underground trouble by so-called boring, there may be an underground trouble depending on the location, and even when the press-fitting operation cannot be continued due to the presence of this underground trouble, The concrete pile K that has been press-fitted by the press-fitting device T is once pulled out, the excavator 30 is supported instead of the concrete pile K by the support mechanism 31 provided in the press-fitting device T, and the soil of the ground S is excavated by the excavator 30. After removing the medium obstacle, the excavator 30 of the press-fitting device T and the concrete pile K are replaced again, and the concrete pile K is press-fitted by the press-fitting device T.

  Therefore, the concrete pile K is buried by the press-fitting device T alone, the excavation work is omitted, the work process is remarkably simplified, and the press-fitting device T is temporarily caused by a ground fault due to conglomerate or the like in the ground S. Even if the press-fitting work cannot be performed by the support mechanism 31, the concrete pile K can be buried by the excavator 30 using the press-fitting device T by the support mechanism 31, so that the work can be continuously performed without interruption, and the work efficiency is improved. It is done.

  Note that, according to the present application, the presence of the support mechanism 31 of the press-fitting device T allows selection of either the press-fitting work of the concrete pile K of the press-fitting device T alone or the excavation work by the excavating device 30. The selection of the work sequence with the excavation work is arbitrary. For example, after conducting a soil survey of the ground S by so-called boring and confirming that the ground S has no conglomerate or the like that obstructs the work, After excavation work, if there are no subsidences, it is determined that there are few subsidences. After that, concrete piles K are buried in the center of the press-fitting work. You may make it return to.

  Thus, the excavation work performed by supporting the excavator 30 by the support mechanism 31 provided in the press-fitting device T will be described. The support mechanism 31 that supports the excavator 30 is configured by the chuck mechanism 17 of the chuck frame 15. Therefore, the outer periphery of the casing 41 of the excavator 30 is fastened and fixed by the chuck mechanism 17, and the reaction force during excavation work by the excavator 30 is supported by the friction force of the tightening and fixing.

For this reason, even the excavator 30 suspended from the wire 33 of the crane is supported by the excavator 30 of the press-fitting device T, so that excavation work can be easily performed.
The excavator 30 lowers the casing 41 fixed by the chuck mechanism 17 together with the chuck frame 15 and rotates the auger 37 and the excavation head 39 in the casing 41 by the same procedure as the press-fitting operation of the concrete pile K. Let me drill.

  In addition, since the support mechanism 31 is configured using the chuck mechanism 17 of the press-fitting device T, the concrete pile K can be embedded with the press-fitting device T having a simple configuration if the excavating device 30 is prepared.

  Further, when the support mechanism 31 is configured by the rail member 42 on the excavator 30 side and the guide groove 43 on the press-fitting device T side, the rail member 42 is provided in the casing 41 of the excavator 30, and the rail member 42 is used as the press-fitting device. When engaged with the guide groove 43 provided at T, the rail member 42 and the guide groove 43 support the reaction force against the rotational force of the auger 37 of the excavator 30.

  Therefore, even when a work reaction force that cannot support the casing 41 with a frictional force is generated, the reaction force of the excavation work is supported by the engagement force between the rail member 42 and the guide groove 43. Even with the excavating device 30, the concrete pile K can be buried with the press-fitting device T.

  In this case, the support mechanism 31 has a guide member 45 attached above the insertion hole 16 of the chuck frame 15, and a circular insertion hole 46 through which the casing 41 of the excavator 30 is inserted into the guide member 45 and an inner periphery of the insertion hole 46. Since the guide groove 43 is formed at a location corresponding to the rail member 42 of the casing 41, the casing 41 of the press-fitting device T is inserted into the insertion hole 46 of the guide member 45 from above to loosen the wire. When the excavator 30 is lowered and the rail member 42 is engaged with the guide groove 43 provided in the press-fitting device T, the rail member 42 and the guide groove 43 support the reaction force against the rotational force of the auger 37 of the excavator 30. Then, the ground S is excavated.

  In this case, several types of guide members 45 are prepared with different diameters of the insertion holes 46 and widths of the guide grooves 43 and can be selectively used. Therefore, the excavator 30 corresponding to the concrete pile K having different diameters and lengths can be used. It can be used and work in an optimal state.

Further, in another embodiment of the support mechanism 31 of FIG. 11, the support mechanism 31 is configured by forming the guide groove 43 in the chuck member 18 of the chuck mechanism 17 at a location corresponding to the rail member 42 of the casing 41. Therefore, the rail member 42 of the casing 41 engages with the guide groove 43 of the chuck member 18 to support the reaction force against the rotational force of the auger 37 of the excavator 30 and excavate the ground S.
Each of the above-described embodiments is illustrated and described separately or mixed for easy understanding. However, these embodiments can be combined in various ways, and these expressions can be used for configuration and operation. However, there is a case where a synergistic effect is obtained.

  DESCRIPTION OF SYMBOLS 1 ... Base frame, 2 ... Upper / lower cylinder, 3 ... Receiving member, 4 ... Rod, 5 ... Opening, 6 ... Weight, 10 ... Press-fit cylinder, 11 ... Strut, 12 ... Cylinder, 13 ... Rod, 15 ... Chuck frame, DESCRIPTION OF SYMBOLS 16 ... Insertion hole, 17 ... Chuck mechanism, 18 ... Chuck member, 19 ... Cylinder, 20 ... Rod, 21 ... Piping, 30 ... Excavator, 31 ... Support mechanism, 32 ... Upper attachment part, 33 ... Wire, 35 ... Case , 36: Rotation drive mechanism, 37: Auger, 38: Rotating shaft, 39 ... Excavation head, 41 ... Casing, 42 ... Rail member, 43 ... Guide groove, 45 ... Guide member, 46 ... Insertion hole.

Claims (5)

  On the upper surface of the ground S where the concrete pile K is installed, a press-fitting device T capable of press-fitting and lowering the concrete pile K by a plurality of chuck members 18 of the chuck mechanism 17 provided so as to be movable up and down is installed. A concrete pile embedding method in which a support mechanism 31 for supporting the excavation device 30 suspended from the wire 33 is provided, and the press-in operation of the concrete pile K by the chuck mechanism 17 and the excavation operation of the excavation device 30 are selected.   On the upper surface of the ground S where the concrete pile K is installed, a press-fitting device T capable of press-fitting and lowering the concrete pile K by a plurality of chuck members 18 of the chuck mechanism 17 provided so as to be movable up and down is installed. When the concrete pile K cannot be press-fitted by the press-fitting device T, the concrete pile K of the press-fitting device T is replaced with the excavator 30, and the excavator 30 is supported by the support mechanism 31 of the press-fitting device T to excavate the ground S. Then, after removing the ground fault of the ground S, the excavation device 30 of the press-fitting device T and the concrete pile K are replaced, and the concrete pile burying method in which the concrete pile K is press-fitted by the press-fitting device T.   In Claim 1 or Claim 2, the excavator 30 is configured by providing a casing 41 on the outer periphery of an auger 37 that is driven and rotated by a rotation drive mechanism 36 in a case 35, and the upper portion of the excavator 30 is connected to a crane. The outer periphery of the casing 41 is frictionally supported by the support mechanism 31 configured by the chuck mechanism 17 while suspended from the wire 33, or the excavation is performed in the guide groove 43 of the support mechanism 31 provided in the press-fitting device T. A concrete pile burying method in which excavation is performed while supporting the reaction force against the rotational force of the auger 37 of the excavator 30 by engaging and supporting the rail member 42 on the outer periphery of the casing 41 of the apparatus 30.   In Claim 3, the said support mechanism 31 is set as the structure which engages the rail member 42 of the outer periphery of the casing 41 of the said excavation apparatus 30 with the guide groove 43 provided in the press-fit apparatus T, and supports reaction force, The said guide The groove 43 is formed in the insertion hole 46 of the guide member 45 detachably provided above the insertion hole 16 of the chuck frame 15 of the press-fitting device T, or in the portion corresponding to the rail member 42 of the casing 41. A method for burying a concrete pile formed on the chuck member 18 of FIG.   A base frame 1 installed on the upper surface of the ground S where the concrete pile K is installed, and a chuck frame 15 having a chuck mechanism 17 that moves up and down by a press-fitting cylinder 10 with respect to the base frame 1. Is provided with a support mechanism 31 for supporting the excavator 30 suspended by a separately prepared wire 33, and the support mechanism 31 is a guide with which a rail member 42 provided on the outer periphery of the casing 41 of the excavator 30 is engaged. A concrete pile embedding apparatus configured by forming the guide groove 43 in the chuck member 17 of the chuck mechanism 17 at a location corresponding to the guide member 45 provided with the groove 43 or the rail member 42 of the casing 41.

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