JP2001032277A - Obstacle pile extracting method and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a working time and costs by moving a high pressure water jetting means downward for excavating along the circumferential face of an obstacle pile while jetting high pressure water, detaching the circumferential face of the obstacle pile from the soil sticking to the circumferential face for lower frictional resistance applied to the circumferential face of the obstacle pile from the soil, and extracting the obstacle pile upward. SOLUTION: Just above an obstacle pile K inserted into the ground G, a high pressure water jetting means 2 is hung by means of a hanging means. While high pressure water is supplied by a high pressure water supplying means 1 for excavating the ground G with high pressure water W jetted from a high pressure water jetting nozzle 10, the high pressure water jetting nozzle 10 is lowered and guided along the circumferential face of the obstacle pile K by means of a nozzle supporting and guiding body. In this way, the circumferential face of the obstacle pile K is disconnected from the soil sticking to it and frictional resistance applied to the circumferential face of the obstacle pile K from the soil during upward movement can be reduced, so that the obstacle pile K can be pulled out from the ground G.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an obstacle pile pulling method and an obstacle pile pulling apparatus.

[0002]

2. Description of the Related Art Conventionally, when constructing a structure on soft ground, a predetermined number of foundation piles are previously built on the soft ground, and the structure is constructed on the foundation pile.

[0003]

However, when constructing a heavy structure by further improving the soft ground,
Foundation piles that have already penetrated into the soft ground may hinder new ground improvement work.

[0004] For that purpose, it is necessary to pull out the foundation pile (hereinafter referred to as "obstacle pile") which becomes an obstacle, but since the soil is closely attached to the peripheral surface of the obstacle pile, the obstacle pile is pulled out. In this case, the frictional resistance that the obstacle pile receives from the soil is very large, so that a large drawing machine for pulling out the obstacle pile must be prepared, and it takes time to pull out and the work cost is high. There is a problem that has become.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention is directed to a method of pulling out and recovering an already obstructed pile from a pile penetrated into the ground, wherein high-pressure water is jetted from high-pressure water jetting means. By moving the high-pressure water jetting means downward along the peripheral surface of the obstacle pile while cutting, the edge of the peripheral surface of the obstacle pile and the soil closely adhered to the peripheral surface are cut, Reduce the frictional resistance of the pile surface from the soil,
An object of the present invention is to provide a method for pulling out an obstacle pile, which is characterized by pulling out an obstacle pile upward.

In the present invention, the high-pressure water supply means for supplying high-pressure water, and the high-pressure water ejection means for excavating and moving along the peripheral surface of the obstacle pile while ejecting the high-pressure water supplied from the high-pressure water supply means And a suspending means for suspending and supporting the high-pressure water jetting means.

[0007] The present invention is also characterized by the following configuration.

The high-pressure water jetting means includes a high-pressure water jet nozzle, and a nozzle support / guide that supports the high-pressure water jet nozzle and guides the high-pressure water jet nozzle downward along the peripheral surface of the obstacle pile. To do.

The high-pressure water jet nozzle includes a drilling jet hole that opens downward, and a propulsion jet hole that opens outward and upward.

[0010]

Embodiments of the present invention will be described below.

[0011] That is, the obstacle pile pulling method according to the present invention is a method of pulling out a pile that has already become an obstacle from a pile penetrated into the ground and recovering the pile, and ejecting high-pressure water from high-pressure water ejection means. While making the high-pressure water jetting means dig down and move along the peripheral surface of the obstacle pile, cut the edge between the peripheral surface of the obstacle pile and the soil that is in close contact with the peripheral surface, and then The feature is that the obstacle pile is pulled out upward.

As described above, since the obstacle is pulled out after cutting the edge between the peripheral surface of the obstacle pile and the soil closely contacting the peripheral surface, the obstacle pile is removed from the soil when the obstacle pile moves upward. The friction resistance received can be reduced, and the obstacle pile can be pulled out smoothly.

As a result, work efficiency and work safety can be improved, and work costs can be reduced.

[0014] The obstacle pile pulling device according to the present invention comprises a high-pressure water supply means for supplying high-pressure water, and excavation along the peripheral surface of the obstacle pile while jetting high-pressure water supplied from the high-pressure water supply means. It is characterized by comprising a moving high-pressure water jetting means and a hanging means for hanging and supporting the high-pressure water jetting means.

In this way, in the obstacle pile pulling device according to the present invention, the high-pressure water jetting means is suspended by the suspension means just above the obstacle pile penetrating the ground.
Subsequently, high-pressure water is supplied from the high-pressure water supply unit to the high-pressure water ejection unit, and the high-pressure water ejection unit is excavated along the peripheral surface of the obstacle pile while ejecting high-pressure water from the high-pressure water ejection unit. be able to.

[0016] As a result, the peripheral surface of the obstacle pile and the soil closely contacting the peripheral surface are cut off to reduce the frictional resistance that the peripheral surface of the obstacle pile receives from the soil during the upward movement.

[0017] Therefore, after the obstacle pile is lifted by the suspending means after the above state, the obstacle pile can be smoothly pulled out from the ground.

The high-pressure water jetting means includes a high-pressure water jet nozzle, a nozzle support / guide body for supporting the high-pressure water jet nozzle and guiding the high-pressure water jet nozzle downward along the peripheral surface of the obstacle pile. It is characterized by having.

In this way, the underground is excavated by ejecting high-pressure water from the high-pressure water ejection nozzle, and the high-pressure water ejection nozzle is guided downward along the peripheral surface of the obstacle pile by the nozzle support / guide. Thereby, the edge between the peripheral surface of the obstacle pile and the underground soil can be cut smoothly and reliably.

The high-pressure water jet nozzle is characterized in that it has a drilling jet hole that opens downward and a propulsion jet hole that opens upward and outward.

In this way, the underground can be excavated by ejecting high-pressure water from the excavation hole of the high-pressure water ejection nozzle, and high-pressure water can be ejected from the propulsion ejection hole of the high-pressure water ejection nozzle. By doing so, the high-pressure water jet nozzle can be propelled downward, and the high-pressure water jet means can have a function of excavating and propelling while excavating.

Therefore, the high-pressure water jetting means can be made as light as possible to improve its handleability, and the structure of the apparatus can be improved without providing a separate means for propelling the high-pressure water jetting means. Simplification and cost reduction can be achieved.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

A shown in FIG. 1 is an obstacle pile pulling device as a first embodiment according to the present invention. The obstacle pile pulling device A includes a high pressure water supply means 1 for supplying high pressure water, High pressure water jetting means 2 which excavates and moves along the peripheral surface of obstacle pile K while jetting high pressure water supplied from supply means 1
And a suspending means 3 for suspending and supporting the high-pressure water jetting means 2.

The high-pressure water supply means 1 is, as shown in FIG.
A submersible pump 4, a water storage tank 5 connected to the submersible pump 4, a pressure pump 6 connected to the water tank 5, and a high-pressure water supply hose 7 connected to a discharge port of the pressure pump 6.
Is provided.

The high-pressure water jetting means 2 includes a high-pressure water jet nozzle 10
And a nozzle support / guide 11 that supports the high-pressure water jet nozzle 10 and guides the high-pressure water jet nozzle 10 downward along the peripheral surface of the obstacle pile K.

As shown in FIGS. 3 and 5, the nozzle support / guide 11 has a connecting piece 12 for connecting to the suspending means 3 and a nozzle support / removably connected to the connecting piece 12. A guide frame 13 is provided.

The connecting piece 12 has a plate-like piece 15 protruding from a tubular piece 14 via a support piece 16 in a bridging manner. 14a is a connection hole, 14b is a locking piece, and 15a is a connection hole.

The nozzle support / guide frame 13 is provided with a plurality of ring-shaped support pieces 17 formed with a diameter larger than the outer diameter of the obstacle pile K at intervals in the vertical direction. 17
A ring-shaped water pipe 18 is attached to the outer peripheral surface of the ring-shaped water pipe 18 in a fitted state, and is extended vertically in the ring-shaped water pipe 18 so as to have four straight water pipes having a length substantially equal to that of the obstacle pile K. 19,19,19,19
Are connected at intervals in the circumferential direction of the ring-shaped water pipe 18, and the middle and lower ends of each straight water pipe 19, 19, 19, 19 are connected to the outer peripheral surface of each ring-shaped support piece 17. Attached to the frame. 17a is a connection hole.

The end of the high-pressure water supply hose 7 is connected to the ring-shaped water pipe 18 via a connection fitting 20.

Thus, the connecting hole 15a of the plate-like piece 15 is formed.
In addition, the hanging wire 23 of the hanging means 3 can be connected, the cylindrical piece 14 is fitted into the uppermost ring-shaped support piece 17, and the connection holes 17a, 14a
They are connected to each other by connecting bolts 29.

The high-pressure water jet nozzle 10 is a straight water pipe.
At the lower end of the high-pressure water jet nozzle 10, an excavation jet hole 21 that opens downward is formed.

As shown in FIG. 1, the suspending means 3 is provided with a suspending wire 22 and a pushing chuck body 24 on a suspending work machine 22.
Is connected to a hydraulic / electric supply unit 25 having an operation panel, and the hydraulic / electric supply unit 25 is connected to a generator 26.

The pushing chuck body 24 chucks the plate-like piece 15 of the connecting piece 12 by a hydraulic actuator, and pushes the nozzle support / guide frame 13 into the underground G by its own weight.

Next, a method of pulling out and collecting the obstacle pile K penetrated into the underground G by the obstacle pile pulling device A will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the high-pressure water jetting means 2 is suspended by the suspending means 3 at a position immediately above the obstacle pile K penetrating into the underground G.

As shown in FIGS. 2 and 3, high-pressure water is supplied to the high-pressure water jetting means 2 from the high-pressure water supply means 1, and the high-pressure water jetting nozzle 10 provided in the high-pressure water jetting means 2 supplies high-pressure water W to the high-pressure water jetting means 2. The underground G is excavated while the high pressure water jet nozzle 10 is lowered and guided along the peripheral surface of the obstacle pile K by the nozzle support / guide 13.

As a result, by cutting off the edge between the peripheral surface of the obstacle pile K and the soil that is in close contact with the peripheral surface, the frictional resistance that the peripheral surface of the obstacle pile K receives from the soil during the upward movement can be reduced. .

As shown in FIG. 4, the obstacle pile K is lifted by the suspending means 3 so that the obstacle pile K is pulled out from the underground G.

At this time, the edge between the peripheral surface of the obstacle pile K and the soil that is in close contact with the peripheral surface is cut off, so that the frictional resistance that the peripheral surface of the obstacle pile K receives from the soil during the upward movement is reduced. Therefore, the obstacle pile K can be pulled out more smoothly than the underground G.

FIG. 6 shows an obstacle pile pulling device A as a second embodiment. The obstacle pile pulling device A has the same basic structure as the obstacle pile pulling device A as the first embodiment. However, the configuration of the high-pressure water jetting means 2 is different.

That is, the high-pressure water jetting means 2 according to the present embodiment comprises four straight water pipes 19, 19,
19,19 project downward, and each straight water pipe 19,1
9, 19, 19 are arranged at substantially equal intervals in the circumferential direction of the ring-shaped water pipe 18, and high-pressure water jet nozzles 10, 10, 10 and 10 are connected respectively.

As shown in FIGS. 7 to 9, the high-pressure water jet nozzle 10 has an excavation jet hole that opens right below.
21 and excavation holes 30 and 30 opening outward and downward
And a propulsion ejection hole 31 that opens upward and outward.

Further, three rolling wheels 32, 32, 32 are attached to the ring-shaped water pipe 18 at substantially equal intervals in the circumferential direction of the ring-shaped water pipe 18. , 32, 32 abut against the peripheral surface of the obstacle pile K in three directions to support the ring-shaped water pipe 18 and to smoothly move while rolling along the extension direction of the obstacle pile K. I have. 33 is a rolling wheel stay and 34 is a rolling wheel spindle.

In this way, the underground G can be excavated by ejecting the high-pressure water W downward from the excavation ejection holes 21, 30, 30 of the high-pressure water ejection nozzle 10, thereby excavating the underground G. High-pressure water W from the propulsion nozzle 31 of the nozzle 10
By jetting the water upward, the high-pressure water jet nozzle 10 can be propelled downward. As a result, the high-pressure water jetting means 2 can have an excavating function of propelling while excavating.

Accordingly, the high-pressure water jetting means 2 can be made as light as possible to improve its handleability, and the apparatus can be provided without separately providing means for propelling the high-pressure water jetting means 2. The structure can be simplified and the cost can be reduced.

FIGS. 10 and 11 show an obstacle pile pulling device A as a third embodiment. The obstacle pile pulling device A has the basic structure of the obstacle pile pulling device A as the first embodiment. However, the configuration of the high-pressure water jetting means 2 is different.

That is, the high-pressure water jetting means 2 according to the present embodiment is suitable when the obstacle pile K is a steel pipe pile.
The nozzle support / guide 11 of the high-pressure water jetting means 2 is
Main carriage 40 moving along the extension direction on the circumference of
A pair of left and right auxiliary trolley support arms 41, 41 that pivotally support the base end of the main trolley 40 and extend in the left-right direction, and auxiliary trolleys 42, 42 attached to the distal ends of the auxiliary trolley support arms 41, 41, respectively.
Is provided. 43 is a pivot bracket, and 44 is a pivot pin whose axis is oriented in the vertical direction.

In this manner, the pair of left and right auxiliary trolley support arms 41, 41 is connected to the pivot pin as shown by the chain line in FIG.
Auxiliary bogies 42, 42 attached to the distal ends of the auxiliary bogie support arms 41, 41 so as to be rotatable around the respective 44, 44,
It is possible to abut on the peripheral surface of the obstacle pile K having an arbitrary outer diameter. Therefore, the adaptability of the obstacle pile pulling-out device A to the obstacle pile K can be favorably secured.

The main bogie 40 has rolling wheels 51, 51, 51, 51 attached to the upper, lower, left and right sides of the bogie main body 50, and the bogie main body 50 extends along the extension direction on the peripheral surface of the obstacle pile K. The bogie main body 50 is provided with a magnetic body 52, and the bogie main body 50 is attracted to the peripheral surface of the obstacle pile K, which is a steel pipe pile, by the magnetic force of the magnetic body 52. 53 is a rolling wheel stay, and 54 is a rolling wheel spindle.

The auxiliary bogie 42 has rolling wheels 61, 61 attached to the upper and lower portions of the bogie main body 60 to connect the bogie main body 60 to the obstacle pile K.
Along with the direction of extension on the circumference of the
A magnetic body 62 is provided on the bogie main body 60, and the bogie main body 60 is attracted to the peripheral surface of the obstacle pile K, which is a steel pipe pile, by the magnetic force of the magnetic body 62. 63 is a rolling wheel stay, and 64 is a rolling wheel spindle.

Then, straight water pipes 45, 46, 46, 47, 47 extending vertically are attached to the main carriage 40 and the distal end and the base end of the pair of left and right auxiliary carriage support arms 41, 41, The straight water pipe 45 attached to the main bogie 40 and the straight water pipes 47, 47 adjacent to the left and right sides thereof are connected via flexible connecting pipes 48, 48. The straight water pipes 46, 46, 47, 47 attached to the arms 41, 41 are connected to each other by rigid connecting pipes 49, 49.
Are connected via.

Here, the high pressure water supply hose 7 is a main carriage.
It is connected to the upper end of a straight water pipe 45 attached to 40.

High-pressure water jet nozzles 10, 10, 10, 10, 10 are connected to the lower ends of the straight water pipes 45, 46, 46, 47, 47, respectively. Reference numeral 10 includes an excavation ejection hole 21 that opens directly downward, and a propulsion ejection hole 31 that opens outward and upward.

Obstacle pile pulling device A according to this embodiment
Is configured as described above, and the obstacle pile pulling device A can easily pull out the obstacle pile K by the following work process.

The main trolley 40 and the auxiliary trolley 42 are
It is installed in a state of being sucked on the upper peripheral surface of the obstacle pile K by 2,62.

In the same state, the high-pressure water supply nozzle 7 passes through each straight water pipe 45, 46, 46, 47, 47, and the high-pressure water jet nozzle 10
The high-pressure water W is pumped to the high-pressure water jet nozzle 21 and the high-pressure water W is jetted from the excavation jet holes 21 and the excavation jet holes 31 of each high-pressure water jet nozzle 10.

The main trolley 40 and the auxiliary trolley 42 are integrally lowered and moved by the excavating force of the high-pressure water jet nozzle 10,
Cut the edge between the peripheral surface of the obstacle pile K and the underground G.

In this state, the obstacle pile K is lifted by the suspending means 3 to pull out the obstacle pile K.

At this time, the edge between the peripheral surface of the obstacle pile K and the soil that is in close contact with the peripheral surface is cut off, so that the peripheral surface of the obstacle pile K receives little frictional resistance from the soil during the upward movement. Therefore, the obstacle pile K can be pulled out more smoothly than the underground G.

As the magnetic bodies 52 and 62, a permanent magnet having appropriate magnetism can be used, or an electromagnet which can be appropriately magnetized by energization can be used.

[0062]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, while the high-pressure water jetting means jets high-pressure water, the high-pressure water jetting means is excavated and moved downward along the peripheral surface of the obstacle pile, thereby obtaining the obstacle pile. It is characterized in that the edge of the peripheral surface of the obstacle and the soil closely contacting the peripheral surface are cut to reduce the frictional resistance that the peripheral surface of the obstacle pile receives from the soil, and then the obstacle pile is pulled upward.

As described above, in the obstacle pile pull-out method according to the present invention, the obstacle pile is pulled out after cutting off the edge between the peripheral surface of the obstacle pile and the soil in close contact with the peripheral surface. Therefore, the frictional resistance that the obstacle pile receives from the soil during the upward movement can be reduced, and the obstacle pile can be pulled out smoothly.

As a result, work efficiency and work safety can be improved, and work costs can be reduced.

According to the second aspect of the present invention, the high pressure water supply means for supplying high pressure water and the high pressure water supplied from the high pressure water supply means are excavated and moved along the peripheral surface of the obstacle pile while jetting. The apparatus includes high-pressure water jetting means and hanging means for hanging and supporting the high-pressure water jetting means.

As described above, in the obstacle pile pulling device according to the present invention, the high-pressure water jetting means is suspended by the suspension means just above the obstacle pile penetrating the ground.
Subsequently, high-pressure water is supplied from the high-pressure water supply unit to the high-pressure water ejection unit, and the high-pressure water ejection unit is excavated along the peripheral surface of the obstacle pile while ejecting high-pressure water from the high-pressure water ejection unit. be able to.

As a result, it is possible to reduce the frictional resistance that the peripheral surface of the obstacle pile receives from the soil when the peripheral surface of the obstacle pile moves upward by cutting off the edge between the peripheral surface of the obstacle pile and the soil that is in close contact with the peripheral surface.

Therefore, if the obstacle pile is lifted by the suspending means after the above state, the obstacle pile can be pulled out smoothly from the underground.

In the present invention, the high-pressure water jetting means supports the high-pressure water jet nozzle and the high-pressure water jet nozzle, and guides the high-pressure water jet nozzle downward along the peripheral surface of the obstacle pile. Nozzle supporting and guiding member.

In this way, the underground is excavated by ejecting high-pressure water from the high-pressure water ejection nozzle, and the high-pressure water ejection nozzle is guided downward along the peripheral surface of the obstacle pile by the nozzle support / guide. Thereby, the edge between the peripheral surface of the obstacle pile and the underground soil can be cut smoothly and reliably.

According to the fourth aspect of the present invention, the high-pressure water jet nozzle includes a drilling jet hole that opens downward and a propulsion jet hole that opens upward and outward.

In this way, the underground can be excavated by ejecting high-pressure water from the excavation hole of the high-pressure water ejection nozzle, and high-pressure water can be ejected from the propulsion ejection hole of the high-pressure water ejection nozzle. By doing so, the high-pressure water jet nozzle can be propelled downward, and the high-pressure water jet means can have a function of excavating and propelling while excavating.

Accordingly, the high-pressure water jetting means can be made as light as possible to improve its handleability, and the structure of the apparatus can be improved without providing a separate means for propelling the high-pressure water jetting means. Simplification and cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an obstacle pile pulling-out device according to the present invention.

FIG. 2 is an explanatory view of a hanging operation of high-pressure water jetting means provided in the obstacle pile pulling-out device.

FIG. 3 is an explanatory diagram of a digging operation by the high-pressure water jetting means.

FIG. 4 is an explanatory view of an operation of pulling out an obstacle pile by a hanging means.

FIG. 5 is an exploded perspective view of high-pressure water jetting means.

FIG. 6 is an explanatory perspective view of an obstacle pile pulling-out device as a second embodiment.

FIG. 7 is an explanatory cross-sectional side view of high-pressure water jetting means.

FIG. 8 is a cross-sectional plan view of a high-pressure water jet nozzle.

FIG. 9 is a low-side view of a high-pressure water jet nozzle.

FIG. 10 is an explanatory plan view of an obstacle pile pulling-out device as a third embodiment.

FIG. 11 is an explanatory diagram of a digging operation of high-pressure water jetting means provided in the obstacle pile pulling-out device.

[Explanation of symbols]

 A Obstacle pile pull-out device G Underground K Obstacle pile W High-pressure water 1 High-pressure water supply means 2 High-pressure water jetting means 3 Hanging means 4 Underwater pump 5 Water storage tank 6 Pumping pump section 7 High-pressure water supply hose

Claims (4)

[Claims] Claims 1. A method of pulling out and recovering an already obstructed pile from a pile penetrated into the ground, wherein the high-pressure water jetting means obstructs the high-pressure water jetting means while jetting high-pressure water from the high-pressure water jetting means. By moving the excavation downward along the periphery of the pile, the edge of the periphery of the obstacle pile and the soil that is in close contact with the periphery are cut, and the frictional resistance that the periphery of the obstacle pile receives from the soil A method for pulling out obstacles, characterized by reducing the size of the obstacles and then pulling out the obstacles upward. 2. High-pressure water supply means for supplying high-pressure water, high-pressure water ejection means for digging and moving along the peripheral surface of the obstacle pile while ejecting high-pressure water supplied from the high-pressure water supply means, And a suspension means for suspending and supporting the water jetting means. 3. A high-pressure water jetting means, comprising: a high-pressure water jetting nozzle; a nozzle support / guide that supports the high-pressure water jetting nozzle and guides the high-pressure water jetting nozzle down along the peripheral surface of the obstacle pile. The obstacle pulling-out device according to claim 2, comprising: 4. The obstacle pile according to claim 3, wherein the high-pressure water jet nozzle has a drilling jet hole that opens downward and a propulsion jet hole that opens outward and upward. Extraction device.