JP4374338B2 - Pile removal equipment - Google Patents

Description

The present invention relates to the removal equipment of the pile. More specifically, the present invention relates to a structure in which a pile with a root-solidified portion can be removed from the ground.

  When rebuilding a building, it is necessary to remove old piles (existing piles) buried in the ground to prevent them from interfering with new piles. Conventionally, such a pile has been removed by driving a pipe having a large diameter around the pile so as not to receive earth pressure from the surroundings, and in this state the pile is lifted with a crane.

  However, this removal method forcibly pulls the pile out of the ground, so a large crane is required, and the pile may be broken during the pulling out and remain in the ground.

As a means for solving such a problem, for example, a pile removal device disclosed in Patent Document 1 is known. This removal apparatus comprises a tube body implanted around the pile (the casing), rotatable blade has a structure provided in the horizontal direction bit and tube side of excavating soil to the bottom. This removal device is in a state where the blade is closed (not rotated inward of the tube) and the tube is rotated in the forward direction and driven into the ground, and the lower blade reaches a place deeper than the tip of the pile. Rotate the tube in the opposite direction. Thereby, a blade | wing can be rotated inside a pipe | tube with the resistance received from soil, a pipe is pulled up in that state, a blade | wing is applied to the front-end | tip of a pile, and a pile is hooked and removed with a pipe body. The blade | wing which hooks a pile is formed by bending the front side inward of a pipe | tube so that it may receive the resistance of soil and may rotate inward of a pipe | tube, when a pipe body is rotated in the reverse direction. Even when the blade is closed, the tip side of the blade is protruded inward of the pipe.

  By the way, depending on the strength of the place where the construction is done, the cement milk is sent to the lower side of the underground to form a solidified part in the underground so that it has a resistance against pulling and subsidence. There is what I did.

Japanese Utility Model Publication No. 7-2538

When using the removal apparatus described in Patent Document 1 to pull out a pile on which a root-solidified portion is formed, there are the following problems.
The removal device described in Patent Document 1 is in a state where the tip side of the blade protrudes inward of the pipe even when the blade is closed as described above . Therefore, in the case of removing a pile having a root solidified portion formed by hardening cement milk, the tip side of the blade is caught by the root solidified portion and cannot be driven further into the ground. That is, in the above-described removal device, the blade cannot reach a position deeper than the tip of the pile, and thus the pile on which the root-solidified portion is formed cannot be removed.

An object of the present invention can be removed from the ground in piles roots hardened portion is formed to provide a removal equipment pile.

Means taken by the present invention to achieve the above object are as follows.
In the first invention,
A removal device for removing piles buried in the ground,
With a tube,
The tube is
Crushing the underground obstacles, and bit to drill or cut,
By rotating the pipe body in the opposite direction to the driving direction, the pipe body can be extended toward the inside of the pipe body, and when the pipe body is pulled up in this state, it comes into contact with the position where the pile can be removed, A blade member that allows it to be removed from the ground,
Resistance means for projecting the blade member toward the inside of the pipe body by receiving the resistance of the soil when rotating the pipe body in the direction opposite to that when driving,
With
The blade member is provided so that a part of the peripheral wall portion including the lower end portion of the tubular body is cut off, and the peripheral wall portion rotates in the horizontal direction and projects toward the inside of the tubular body,
The resistance means for projecting the blade member toward the inside of the tubular body is configured by providing a protruding object downward from the lower end surface of the blade member,
The tip of the bit that protrudes downward from the lower end surface of the tubular body protrudes downward from the resistance means,
The blade member and the resistance means are configured such that when the tube body is driven in, a portion that is within the thickness width of the tube body and protrudes toward the inside of the tube body is not formed.
Pile removal device.

In the second invention,
Fluid ejecting means capable of sending fluid into the ground corresponding to the outer peripheral side or inner peripheral side of the tubular body is provided.
It is a pile removal apparatus concerning the 1st invention.

In the claims and the column of the next action, each constituent element of the present invention is described by correspondingly assigning a reference numeral given to each part in an embodiment described later. However, this code granted is for the purpose of facilitating the understanding of the description only and are not meant to be limiting to the various parts of each constituent.

(Work)
The operation of the present invention will be described. To remove a pile buried in the ground, first, the tube (1) constituting the removal device (T) is rotated and pushed into the ground and driven around the pile. Next, when the blade member (14) reaches the position where the pile can be removed, rotate the tube (1) in the reverse direction so that the blade member (14) protrudes inward of the tube (1). To do. The blade member (14) rotates inward in the tube body (1) by rotating the tube body (1) in the reverse direction so that the resistance means (141) receives the resistance of the soil. In this state, the pipe body (1) is pulled up and the protruding blade member (14) is brought into contact with a position where the pile can be removed. And the pipe (1) is pulled up as it is. As a result, the pile is caught in the blade member (14) and removed from the ground together with the pipe body (1).

According to the removal device (T), the blade member (14) can be accommodated within the thickness width of the tubular body (1), and a portion protruding inward of the tubular body (1) can be prevented from being formed. , even in the case of piles with roots consolidated unit, without the blade member (14) is caught in the roots hardened part can be driven while cutting the roots hardened portion at bit (11, 12).

  If the fluid ejecting means (13a, 13b) that can send fluid to the ground on the outer peripheral side or inner peripheral side of the tube (1) is provided, it is driven while the soil is being dissolved by the ejected fluid .

According to the present invention, the blade member can be accommodated within the thickness width of the tubular body, and can be driven in a state where a portion protruding toward the inside of the tubular body is not formed. Thus, for example, even if the pile that has a root consolidated unit, without the blade member or caught by the roots hardened part can be driven while cutting the roots hardened portion at bit. That is, according to the present invention, even a pile having a root-solidified portion can be removed.

Embodiments of the present invention will be described in more detail with reference to the drawings.
FIG. 1 shows an embodiment of a pile removal device according to the present invention, and is an enlarged perspective view of a main part viewed from the lower side.
FIG. 2 is a bottom view of the removal device shown in FIG.
FIG. 3 is an AA longitudinal sectional view of the removal device shown in FIG.

  The removal device T includes a casing 1 that is a tubular body having a required length (see FIGS. 4 to 7 for the length). The casing 1 has an inner diameter larger than the diameter of the pile to be removed from the ground. In the peripheral wall portion of the casing 1, a plurality of escape holes 15 for escaping water injected into the casing 1 to the outside are provided over the substantially entire length with a required interval in the length direction in a state of penetrating the inside and outside. is there. In addition, although the casing 1 shown in this Embodiment used what was formed using the steel pipe, this is not limited, For example, the thing using concrete can also be used.

  The lower part of the casing 1 is a replaceable head part 10. The head portion 10 is thicker than the other portions of the casing 1 and has a short tube shape with a slightly larger outer diameter. The head unit 10 is replaced when worn out.

The head unit 10 will be described in detail.
At the lower end of the head portion 10, crushing the underground obstacle, the external bit 11 and the inner bit 12 to drill or cut is provided. Protrudes from the external bit 11 outer peripheral portion downward, the internal bit 12 is provided so as to project downward from the lower end surface. External Bit 11 and the inner bit 12, are arranged alternately over the entire circumference at a predetermined interval. External Bit 11 and the inner bit 12 in this embodiment has been shown as a state which is provided to alternately three places respectively, which is not limited, the number can be set arbitrarily. Since the external bit 11 and the inner bit 12 using a known technique, a detailed description of the structure will be omitted.

The portion where the external bit 11 and the inner bit 12 is not provided among the lower portions of the head portion 10 by rotating at a direction opposite to type in the casing 1 is rotated in the forward direction, the casing 1 inwards A blade member 14 that can be overhanged is provided. The blade member 14 is formed by cutting out a part of the peripheral wall portion including the lower end portion of the head portion 10. Therefore, the blade member 14 has the same width and thickness as the width of the head portion 10, and has a slightly curved shape. The blade member 14 is provided so as to be able to project inward from the casing 1 by rotating in the horizontal direction by providing a hinge portion 140 on one side.

  The blade member 14 is configured such that the side end surface opposite to the hinge portion 140 cannot be rotated outward by being obliquely cut as shown in FIG. More specifically, the inner circumferential surface and the arc portion of the outer circumferential surface are formed to have substantially the same length.

  Further, a resistor 141 is provided on the lower end surface of the blade member 14 as resistance means for projecting the blade member 14 inward of the casing 1. The resistor 141 is provided so as to form a protrusion protruding downward. The blade member 14 is formed in such a size that it can abut the tip of the pile and remove the pile from the ground together with the casing 1 when projecting inside the casing 1.

  Water jetting devices 13a and 13b, which are fluid jetting means, are provided at two opposing locations on the outer peripheral portion of the casing 1 (including the head portion 10). The water injection devices 13a and 13b include water supply pipes 130a and 130b provided in a state extending linearly along the length direction of the casing 1, and water injection nozzles 131a and 131b provided at the tips thereof.

  The cover members 132a and 132b are provided outside the water supply pipes 130a and 130b so as to cover almost the entire length, so that the water supply pipes 130a and 130b are not exposed to the outside of the casing 1. The cover members 132a and 132b shown in the present embodiment are those formed using equilateral angle steel, but the shape of the cover member is not particularly limited. However, since the cover member receives a considerable earth pressure from the soil when the casing 1 is rotated, a shape that can make this earth pressure as small as possible is preferable.

Water injection nozzle 131a is the lower side near the head portion 10, the water in the external bit 11 and the inner bit 12 side is provided downwardly to allow injection. The water injection nozzle 131b is provided at a position slightly above the water injection nozzle 131a so that water can be injected obliquely downward inside the casing 1 from the outside (see FIG. 3). On both sides of each of the water injection nozzles 131a and 131b, bank members 133a and 133b are provided to prevent soil from directly hitting the water injection nozzles 131a and 131b when the casing 1 is rotated. Each bank member 133a, 133b is formed to have a required height. Each bank member 133a, 133b is provided with a plurality of rod-like erection members 134 at a required interval.

(Work)
FIG. 4 is an explanatory diagram of the use state showing the state where the soil around the upper part of the pile is removed and the removal device is suspended by the pile driving machine,
FIG. 5 is an explanatory diagram of a use state showing a state where the removal device is driven into the ground from the state shown in FIG.
FIG. 6 is an explanatory diagram of the use state showing a state in which the pile is pulled out from the inside of the removal device,
FIG. 7 is an explanatory view of the usage state showing a state in which a pile remaining in the ground is removed.

  With reference to FIG. 1 thru | or FIG. 7, the usage method and effect | action of the removal apparatus T shown in this Embodiment are demonstrated. In addition, this Embodiment demonstrates the case where the pile 8 of the state which was buried in the ground and the root hardening part 80 by the cement milk was formed in the lower part side is removed. Moreover, in this Embodiment, what was called a pile driving machine 9 was used as a civil engineering machine which drives the removal apparatus T into the ground or pulls it up from the ground. Specifically, in the pile driving machine 9, a rack 900 is provided over the entire length of a leader 90 extending in the vertical direction, and an elevating device 91 for moving the removal device T up and down is attached to the rack 900 via a pinion gear (not shown). The one having a structure that moves up and down (for example, one disclosed in Japanese Patent Application Laid-Open No. 2004-150078) was used.

  Please refer to FIG. First, since the pile 8 is in a state of being buried in the ground, the upper layer of the ground is dug up so that the upper portion of the pile 8 is exposed. And the scaffold member which consists of metal boxes in the vicinity of the pile 8 is embed | buried so that an upper surface may become substantially flush with the ground surface, and the pile driving machine 9 can be installed in the stable state. In addition, this process is not necessary when removing the thing which the upper part of a pile exposes to the ground surface beforehand.

  Next, the upper part of the removal device T is attached to the lifting device 91 of the pile driving machine 9, and the lifting device 91 is moved to the upper part of the rack 900 so that the removal device T is suspended. The pile driving machine 9 is installed at a position where the pile 8 is arranged in the casing 1 of the removal device T by lowering the lifting device 91.

Please refer to FIG. The removal device T is rotated by the lifting device 91, and the lifting device 91 is lowered in a state where the blade member 14 is within the thickness width of the head portion 10 and does not protrude toward the inside of the casing 1, and the casing around the pile 8. The removal device T is driven into the ground so that 1 is provided.
The removal device T is driven while water is injected from the water injection nozzles 131a and 131b by the water injection devices 13a and 13b, and the soil inside and outside the casing 1 is dissolved by water pressure. The water injected into the casing 1 flows out from the escape hole 15 to the outside of the casing 1 and does not accumulate inside.

The bottom side of the pile 8, since the root solidified portion 80 by the cement milk is formed, Typing to a certain depth, the external bit 11 and the inner bit 12 that is provided at the lower end of the head portion 10 is the It hits the root hardening part 80. Removal device T has a lifting device 91 provided in the rack 900 is driven is lowered, since the rotating while being pushed by a strong downward force, the root hardened portion outside bit 11 and the inner bit 12 It is driven while cutting 80. That is, in the removal device T, the blade member 14 is formed by cutting out a part of the peripheral wall portion of the head portion 10, so that it is within the thickness width of the head portion 10 when driven and does not protrude into the casing 1. Therefore, it is driven into the root-clamping portion 80 without being caught as in the conventional case.

  Please refer to FIG. When the blade member 14 reaches a place deeper than the tip of the pile, driving of the removal device T is stopped, and supply of water to the water injection devices 13a and 13b is also stopped. In this way, the earth pressure applied to the pile 8 is applied to the casing 1, and the soil in the casing 1 is dissolved with water, and hangs down from the exposed upper portion of the pile 8 and the upper portion of the leader 90 of the pile driving machine 9. The stake wire 92 is hung on the crane hook 901 and the pile 8 is pulled upward. However, the pile 8 may be broken in the middle without falling out, and the lower side may remain in the ground.

  Please refer to FIG. When the pile is broken in the middle and the lower side remains in the ground, the removal device T is rotated in the direction opposite to the forward direction when driven, and the blade member 14 is rotated so as to project inward of the casing 1. . Specifically, since the resistance member 141 provided on the lower end surface receives the resistance of the soil when the removal device T rotates in the reverse direction, the blade member 14 is projected to the inside of the casing 1 around the hinge portion 140. Rotate.

  Since the blade member 14 protrudes inward of the casing 1 at a position deeper than the tip of the pile 8, when the lifting device 91 is lifted and the removal device T is pulled up, the blade member 14 is brought into contact with the tip of the pile 8. And the part which remained in the ground of the pile with the removal apparatus T is pulled up from the ground by pulling up the removal apparatus T in this state. Thus, the remaining part of the pile 8 is removed from the ground.

  In the present embodiment, the process of pulling out the pile with a crane is included, but this is not limited. For example, in the case of a pile with a short length, the process of pulling out with a crane is not included, and the removal device T It can also be removed with the pulling up.

  In addition, although not described in the present embodiment, when the pile to be removed is a long object, the removal device T connects a plurality of casings in the length direction while driving, so as to correspond to the pile. It is constituted by making it into a state of a long object.

  In the present embodiment, the rack 90 is provided in the leader 90, and the pile driving machine 9 having a structure in which the lifting device 91 is lifted and lowered with respect to the rack 900 via a pinion gear (not shown) is used. This is not a limitation, and the civil engineering machine is not particularly limited as long as the removal device T can be driven into the ground or pulled up from the ground. For example, it is possible to use a type that does not push in the removal device T but enters the ground by its own weight by rotating.

  In the present embodiment, the water ejecting devices 13a and 13b are cited as the fluid ejecting means, and water is ejected. However, this is not limited, and air (air) can be ejected from the fluid ejecting means. .

  The terms and expressions used in this specification are merely explanatory and are not limiting at all, and exclude terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to do. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

The principal part expansion perspective view which shows one Embodiment of the pile removal apparatus which concerns on this invention. The bottom view of the removal apparatus shown in FIG. The AA longitudinal cross-sectional view of the removal apparatus shown in FIG. The use condition explanatory drawing which shows the state which removed the soil around the pile upper part and suspended the removal apparatus with the pile driving machine. FIG. 5 is a use state explanatory diagram illustrating a state in which the removal device is driven into the ground from the state illustrated in FIG. 4. Use condition explanatory drawing which shows the state which pulls out a pile from the inside of a removal apparatus. Use condition explanatory drawing which shows the state which removes the pile which remained in the ground.

T removal device 1 casing 10 head portion 11 outside bit 12 internal bit 13a, 13b water injector 130a, 130b water pipes 131a, 131b water injection nozzles 132a, 132b cover member 133a, 133b bank component 134 bridging member 14 the blade member 140 Hinge part 141 Resistor 15 Relief hole 8 Pile 80 Rooting part 9 Pile driver 90 Leader 900 Rack 901 Crane hook 91 Lifting device 92 Sling wire

Claims (2)

A removal device for removing piles buried in the ground,
It has a tube (1)
The tube (1)
Crushed underground obstacles, and bits for drilling or cutting (11, 12),
By rotating the pipe body (1) in the opposite direction to the driving direction, the pipe body (1) can be projected inward, and when the pipe body (1) is pulled up in this state, the pile can be removed. A blade member (14) that abuts and enables the pipe (1) and the pile to be removed from the ground,
Resistance means (141) for projecting the blade member (14) inward of the pipe body (1) by receiving the resistance of the soil when rotating the pipe body (1) in the direction opposite to that when driving,
With
The blade member (14) is provided so that a part of the peripheral wall portion including the lower end portion of the tube body (1) is cut out and the peripheral wall portion rotates in the horizontal direction so as to protrude inward of the tube body (1). And
The resistance means (141) for projecting the blade member (14) to the inside of the pipe body (1) is configured by providing a protrusion from the lower end surface of the blade member (14),
The tip of the bit (12) that protrudes downward from the lower end surface of the tube (1) protrudes downward from the resistance means (141),
The blade member (14) and the resistance means (141) are configured such that when the tubular body (1) is driven, a portion protruding within the tubular body (1) is not formed within the thickness width of the tubular body (1). There is
Pile removal device. Fluid ejecting means (13a, 13b) capable of sending fluid into the ground corresponding to the outer peripheral side or inner peripheral side of the tube (1) is provided.
The pile removal apparatus according to claim 1.

Images