JP5350562B1 - Existing pile removing device and method - Google Patents

Abstract

An existing pile removing apparatus and method for removing an unnecessary existing pile buried in the ground simply and efficiently.
A pile chuck shaft portion 55 that is vertically installed and that can be connected to a lower portion of a hydraulic swivel, two grip portions 51 for gripping the pile, and a pile chuck shaft portion 55 A gripping portion rotating shaft portion 52 that is connected and is rotatably installed at a substantially central portion of the two gripping portions 51, a hydraulic cylinder 53 for rotating the two gripping portions 51, and two grippers Pile having two connecting portions 54 that are rotatably connected to the piston 51 of the hydraulic cylinder 53 and the portion 51 and are configured so that the two gripping portions 51 open and close in response to the piston 56 coming in and out. The chuck 50 is provided, the pile chuck 50 is lowered to the position of the tip of the pile, and the tip of the pile is gripped and taken out.
[Selection] Figure 3

Description

  The present invention relates to an existing pile removing apparatus and method for removing unnecessary piles buried in the ground.

  For example, in the conventional existing pile removing apparatus shown in Patent Document 1, a casing having an excavating blade for digging the periphery of an existing pile that is buried in the ground and should be removed is used as a casing rotary lifting device. Then, it is lowered while rotating, excavated to a predetermined depth, the existing pile cutting blade provided at the lower end of the casing is protruded from the inner surface of the lower end, the existing pile is cut, and the existing pile cutting blade is cut Of the existing piles, the part above the cutting part is gripped by the grab of the gripping device having a grab that is hung from the crane and opened and closed, taken out from the upper opening of the casing, and then the casing is rotated. While descending. This makes it possible to easily remove existing piles buried in the ground and having a large length and weight.

JP 2009-2056 A

  However, in the conventional existing pile removing device, when a portion above the cutting portion of the existing pile is held by a grab that is hung from a crane and opened and closed and taken out from the upper opening of the casing, adjustment of the gripping work is adjusted. There is a problem in that it cannot be efficiently gripped and taken out because the ability and gripping force are not sufficient. In addition, when taking out the tip part of the lowermost part of the existing pile with a small shape and position, it is often said that the gripping work adjustment ability and the structure for gripping are not sufficient, so it is often not possible to grip and take out. There's a problem.

  In view of the above-described problems, an object of the present invention is to provide an existing pile removing apparatus and method for removing an unnecessary existing pile buried in the ground easily and efficiently.

  An existing pile removing apparatus according to the present invention includes a hydraulic unit that supplies hydraulic pressure, an auger that rotates a shaft by a rotation drive mechanism, a hydraulic swivel that is installed around the shaft and transmits hydraulic pressure supplied from the hydraulic unit, A casing connected to the shaft and excavating the periphery of a pile buried in the ground, a cutter connected to the lower part of the casing and moved inward of the casing to cut the pile, and a cutter drive unit having a cutter entry / exit mechanism And a control unit for controlling the cutter driving unit by the hydraulic pressure transmitted from the hydraulic swivel based on an input for controlling the entry and exit of the cutter, and a pile chuck for gripping and taking out the cut pile, The pile chuck is connected to the lower part of the hydraulic swivel, and a vertically installed pile chuck shaft portion that can be rotated and controlled, a plurality of gripping portions for gripping the pile, A gripping portion rotating shaft portion connected to the hook shaft portion and rotatably installed at a substantially central portion of the plurality of gripping portions, a hydraulic cylinder for rotating the plurality of gripping portions, and a plurality of gripping portions, And a plurality of coupling portions connected to the piston of the hydraulic cylinder so as to be pivotable and configured to open and close the plurality of gripping portions corresponding to the pistons coming in and out.

  By doing in this way, the operator controls the rotation of the pile chuck shaft part of the pile chuck and the hydraulic cylinder, so that the plurality of gripping parts open and close in response to the piston in and out, so that from the cutting part of the existing pile With respect to the upper part and the lowermost tip which is usually difficult to take out, it is possible to easily and efficiently perform the gripping and taking out operation by the pile chuck.

  In addition, the existing pile removing method according to the present invention includes a hydraulic unit that supplies hydraulic pressure, an auger that rotates a shaft by a rotational drive mechanism, and a hydraulic swivel that is installed around the shaft and transmits hydraulic pressure supplied from the hydraulic unit. And a casing that is connected to the shaft and excavates around the pile buried in the ground, a cutter that is connected to the lower part of the casing and moves inward of the casing to cut the pile, and a cutter having a cutter entry / exit mechanism A drive unit, a control unit for controlling the cutter drive unit by hydraulic pressure transmitted from a hydraulic swivel based on an input for controlling the entry and exit of the cutter, and a pile chuck for gripping and taking out the cut pile A step of burying the casing around the pile, a step of cutting the pile with a cutter, and removing the buried casing at the connecting portion, and a hydraulic swivel The step of connecting the lot and the pile chuck, the step of grasping the upper part of the cut pile with the pile chuck and taking it out, and the casing being buried to the bottom of the pile, could not be taken out in the previous takeout step The method includes the steps of lowering the pile chuck to the position of the tip of the pile, gripping and taking out the tip of the pile with the pile chuck, and taking out the casing.

  In this way, the operator controls the pile chuck, so that the portion above the cutting portion of the existing pile and the lowermost tip portion that is usually difficult to take out can be easily and efficiently piled. Gripping and unloading operations can be performed using a chuck.

  According to the existing pile removing apparatus according to the present invention, by controlling the pile chuck, the operator can easily simplify the portion above the cutting portion of the existing pile and the lowermost tip that is usually difficult to take out. In addition, it is possible to efficiently perform gripping and unloading operations using a pile chuck.

It is a figure which shows the outline | summary of the existing pile removal apparatus which concerns on this invention. It is a figure which shows the structure of the monitor apparatus of the existing pile removal apparatus which concerns on this invention. It is a front view which shows the structural example of the pile chuck | zipper of the existing pile removal apparatus which concerns on this invention. It is a top view which shows the structural example of the pile chuck | zipper of the existing pile removal apparatus which concerns on this invention. It is a 1st figure which shows the example of the existing pile removal method which concerns on this invention. It is a 2nd figure which shows the example of the existing pile removal method which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an outline of an existing pile removing apparatus according to the present invention. The existing pile removing apparatus 100 has the following configuration. An operator enters the operation room 1 of the crane, and the operator controls the entire work using an operation unit including switches in the operation room 1.

  An auger 3 having a rotation drive mechanism and rotating the shaft is connected to the upper end of the crane 2. Under the auger 3, a hydraulic pipe 11 that is installed around the rotating shaft of the auger 3 and is supplied from the monitor device 10 is connected, and a hydraulic swivel 4 that supplies the hydraulic pipe 6 downward is installed. The lower part of the hydraulic swivel 4 is connected to a rotating shaft in the hydraulic swivel 4, and a casing 5 for excavating while rotating around a pile (PC pile) 12 buried in the lower part of the ground 13 is connected. Yes. A digging blade 9 for digging the ground is provided at the lowermost part of the casing 5. Moreover, although the mechanism for taking out the water and air for digging underground is also provided in the lowest part of the casing 5, since it is not directly related to the content of this invention, description is abbreviate | omitted. Further, the upper end of the crane 2 is also provided with a hook 14 for hanging various heavy objects.

  Around the lower portion of the casing 5, there are two systems, a cutter 8 that can move while rotating inward to cut the existing pile 12, and a cutter drive unit 7 that has a mechanism for moving the cutter 8 in and out. In place. A hydraulic pipe 6 supplied from the hydraulic swivel 4 is connected to each cutter driving unit 7 through the periphery of the casing 5.

  The monitor device 10 that displays information corresponding to the rotational position of the cutter 8 and the degree of opening and closing of the pile chuck described later is installed in a place where an operator in the operation room 1 can visually recognize. In addition, in order to control the entry / exit of the cutter 8 and the opening / closing of the pile chuck, an electrical input (switch on / off) by an operator is received, and a control unit that controls the cutter driving unit 7 and the pile chuck by hydraulic pressure, and hydraulic pressure Is provided in the monitor device 10. The weight of the existing pile removing apparatus 100 according to the present invention having the above-described configuration is about 25 to 35 tons, and can be operated with a truck crane, a rough terrain crane, and the like, and has an advantage that the work space can be smaller than the conventional one. is there.

  FIG. 2 is a diagram showing a configuration of the cutter and pile chuck monitoring device 10 of the existing pile removing device according to the present invention. A hydraulic pipe 26 from the hydraulic unit 21 is connected to the pump 22. A solenoid valve 24 is connected from the pump 22 through a hydraulic pipe 27. The pump 22 is driven by a motor 23. The pump 22 and the electromagnetic valve 24 are on / off controlled by an electrical signal from the control unit 25. When the operator operates the operation unit 28 including a switch in the operation chamber 1, the control unit 25 operates and controls the pump 22 and the electromagnetic valve 24.

  A hydraulic pipe 29 connected to the output side of the solenoid valve 24 is connected to a hydraulic input unit 36 in the cylinder 34. A cylinder 34 is vertically installed above the base 30 and slides up and down by adjusting hydraulic pressure. In the cylinder 34, a hydraulic input part 36 is connected to the lower part of the piston 35, and a hydraulic output part 37 is connected to the upper part. The output pipe 11 connected to the hydraulic output unit 37 is connected to the hydraulic swivel 4.

  A transparent scale plate 31 on which a scale corresponding to the position (height) of the piston 35 is written at the upper part of the cylinder 34, and a display board on which a numerical display corresponding to each scale is written beside the scale plate 31 32 is fixed. On the display board 32, for example, 0 display corresponds to the lowest position of the piston 35, 150 display corresponds to the uppermost position of the piston 35, and 25 to 125 display therebetween is the piston 35. Correspond to each of the middle positions. The details of the operation of the cutter and the pile chuck will be described later. The 0 display on the scale plate 31 indicates a state in which no cutter has come out and the state in which the pile chuck is completely open, and 150 indicates that the cutter has been completely output. The state and the pile chuck fully closed, the 25-125 indications correspond to indicate that the cutter is in the middle position and that the pile chuck is in the middle position of opening and closing, respectively.

  When the operator turns on the switch of the operation unit 28, the control unit 25 operates to open the electromagnetic valve 24, and the oil from the pump 22 is sent to the hydraulic pipe 29 through the hydraulic pipe 27. And it flows in into the lower part of piston 35 from hydraulic input part 36, and pushes up piston 35 up. Then, the position of the corresponding piston 35 on the scale plate 31 moves higher. That is, the operator can know the position of the cutter and the open / close state of the pile chuck during operation.

  FIG. 3 is a front view showing a configuration example of the pile chuck 50 of the existing pile removing device according to the present invention. FIG. 4 is a plan view thereof (however, the display of the pile chuck shaft portion 55 and the like is omitted). In the pile chuck 50, two pile gripping portions 51 installed symmetrically at the lower portion of a vertically controllable pile chuck shaft portion 55 for connecting to the lower portion of the hydraulic swivel 4, a gripping portion A rotating shaft portion 52, a hydraulic cylinder 53, and two connecting portions 54 are provided.

  About the shape of the two pile holding parts 51, a lower part is a part of a cylinder and it is a fan shape which becomes narrow, so that the width | variety of a side surface goes down. The upper part of the two pile holding parts 51 is a part of a cone, and has a fan shape that becomes narrower as the width of the side surface goes up. When the two pile gripping portions 51 are open, the lower portion of the pile gripping portion 51 is substantially vertical, and the soil passing through the pile chuck 50 is released to excavate in that state. It has an opening 57 having an area, and has a structure in which the upper portion of the pile gripping portion 51 is substantially vertical when completely closed. The diameter of the pile chuck 50 is slightly smaller than the inner diameter of the casing 5 so as to enter the inside of the casing 5 substantially vertically and not to tilt during movement and opening / closing operation.

  The gripping part rotation shaft part 52 is horizontally installed at a substantially central part of the two gripping parts 51 so as to be rotatable. The hydraulic cylinder 53 is vertically installed on the upper part of the gripping part rotation shaft part 52 in order to rotate the two pile gripping parts 51. The two connecting portions 54 are pivotally connected to the upper portions of the two gripping portions 51 and the upper portion of the piston 56 of the hydraulic cylinder 53, respectively. It is configured such that the lower ends of the two gripping portions 51 are opened and closed by rotating symmetrically about the same rotation angle about the partial rotation shaft portion 52 as an axis. Also, a plurality of protrusions (bits) 59 having a good shape are provided inside the lower portions of the two pile gripping portions 51 so as not to slip and fail to grip the existing piles. The stopper 58 is horizontally provided inside the two pile gripping portions 51 under the gripping portion rotation shaft portion 52, and when the existing pile is gripped, the existing pile is moved to the gripping portion rotation shaft portion 52 and the like. It is to prevent you from hitting.

  FIG. 5 is a first diagram illustrating an example of an existing pile removing method according to the present invention. In FIG. 5A, the auger 3, the hydraulic swivel 4, the casing 5, and the cutter driving unit 7 are connected in order from the tip of the crane 2. The casing 5 includes an upper casing 5A, a lower casing 5B, and a flange (or clutch) 16 for connecting or disconnecting them. The display of hydraulic piping and cutters is omitted. These are set at a position directly above the existing pile 12 of a PC pile having a total length of 20 to 30 m embedded in the lower part of the ground 13.

Next, as shown in FIG.5 (b), it pushes into the existing pile 12 first rotating the casing 5B which is the lower part of the casing 5 to the circumference | surroundings centering on the existing pile 12 to 5-10 m. . Next, when the operator operates the operation unit 28 including a switch, the entrance / exit control of the cutter 8 is controlled based on the display on the scale plate of the monitor device 10 corresponding to the entrance / exit position of the cutter 8 in the cutter drive unit 7. The operation is performed accurately so that the load on the cutter 8 does not become excessive, and the existing pile 12 is gradually cut. If the existing pile 12 is completely cut at the cutting part 17, the cylindrical soil in the casing 5B rotates, so that another worker sees and judges it, and gives a signal to the operator who is operating it. .
Next, the operator stops the rotation of the casing 5, and with the cutter 8 left out, the operator separates the casing 5 </ b> A and the casing 5 </ b> B from the flange (or clutch) 16 and pulls up the casing 5 </ b> A.

Next, as shown in FIG. 5 (c), the casing 5A and the flange (or clutch) 16 connected to the lower part of the hydraulic swivel 4 are removed, and the lot 15 and the pile chuck 50 are newly connected to each other. Set these in the upper position.
Next, as shown in FIG. 5 (d), the pile chuck 50 is lowered to a position above the cut existing pile 12 and is gripped by the pile chuck 50. At that time, when the operator operates the operation unit 28 including a switch, the pile chuck 50 is controlled to be opened and closed based on the display of the scale plate corresponding to the opening and closing position of the pile chuck 50 of the monitor device 10. The operation is accurately performed so that 50 securely holds the upper part of the existing pile 12.
Next, as shown in FIG. 5 (e), when the whole is pulled up with the pile chuck 50 gripping the upper part of the existing pile 12, the upper part of the existing pile 12 can be taken out from the cutting part 17. The upper part of the existing pile 12 is lifted and moved to a place for placing on the ground. The existing pile 12A which is the lower part of the existing pile 12 cut | disconnected by the cutting part 17 is in the state left in the ground.

  Next, the lot 15 and the pile chuck 50 connected to the lower part of the hydraulic swivel 4 are removed, the casing 5A and the flange (or clutch) 16 are connected again, and 5 again from the upper end of the existing pile 12A remaining in the ground. The casing 5B is further pushed into the ground up to 10 m, and the upper portion of the existing pile 12A is cut in the same manner as shown in FIGS. 5 (a) to 5 (e). The upper existing pile 12A is lifted and moved. By repeating this operation several times, the existing pile 12 having a total length of 20 to 30 m can usually be completely removed from the ground.

FIG. 6 is a second diagram illustrating an example of an existing pile removing method according to the present invention. FIG. 6A shows a state in which the casing 5 </ b> B is buried up to the lowest part of the existing pile 12. In other words, it is a diagram showing the final stage of the work shown in FIG.
Next, as shown in FIG. 6B, the upper portion of the existing pile 12 left in the ground is gripped by the pile chuck 50 as described in FIG. In the gripped state, the part of the existing pile 12 is pulled up by the pile chuck 50 and moved to a place for placing on the ground.
However, as shown in FIG.6 (c), the front-end | tip part 12B of the existing pile 12 which was broken for the reason of strength etc. and was not able to be taken out may remain in the ground.
In this case, as shown in FIG. 6 (d), the pile chuck 50 is lowered to the position of the tip end portion 12 </ b> B of the existing pile 12 with the casing 5 </ b> B buried to the lowermost portion, and the tip end portion 12 </ b> B is gripped by the pile chuck 50. And pull up. The shape of the distal end portion 12B is various, and the position is not always in the center, and it is difficult to grip well with the gripping means having the conventional structure. In the pile chuck 50 according to the present invention, the operator can almost certainly grasp whether or not the front end portion 12B is gripped without tilting in the casing 5B during the work. Further, since the pile chuck shaft portion 55 can be controlled in rotation, the pile chuck 50 can be set in a direction in which the tip portion 12B can be easily gripped by performing forward / reverse operation.

After pulling up to the tip 12B of the existing pile 12 with the pile chuck 50, finally, the lot 15 and the pile chuck 50 are removed from the hydraulic swivel 4, the casing 5A and the flange (or clutch) 16 are connected again, and the casing Remove 5B.
Further, as shown in FIG. 6E, when the tip 12B is close to the end and cannot be gripped by the pile chuck 50, the pile chuck 50 is removed and the spiral 60 is attached. The spiral 60 is provided with a spiral protrusion 60A around the vertical axis, and a head 60B is provided at the lowermost part for breaking the tip 12B of the existing pile 12 into small pieces while rotating. After the tip portion 12B is crushed into small pieces by the head 60B, the small pieces are carried upward by the projection 60A as a guide by the rotation of the spiral 60, and are taken out to the ground. Alternatively, the pile chuck 50 may be connected again to grip and take out the small piece. With such a work method, the tip 12B of the existing pile 12 can be completely removed from the ground regardless of the shape and position of the tip 12B.

As described above, according to the existing pile removing apparatus and the method thereof according to the embodiment of the present invention, the operator is provided with a portion above the cutting portion 17 of the existing pile 12 and a lowermost portion that is usually difficult to take out. About the front-end | tip part 12B, operation of holding | grip and taking out by the pile chuck | zipper 50 etc. can be performed simply and efficiently.
The present invention is not limited to the embodiments described above, and various other embodiments can be adopted. For example, the structure which bends the lowest part of the two pile holding parts 51 inside may be sufficient. Further, the pile chuck 50 may have three or more pile gripping portions 51 instead of the two pieces.

  INDUSTRIAL APPLICABILITY The present invention can be used for an existing pile removing device and method for removing unnecessary piles buried in the ground.

DESCRIPTION OF SYMBOLS 1 Operation room 2 Crane 3 Auger 4 Hydraulic swivel 5 Casing 6, 11 Hydraulic piping 7 Cutter drive part 8 Cutter 9 Excavation blade 10 Monitor apparatus 12 Existing pile 13 Ground 14 Hook 15 Lot 16 Flange (or clutch)
17 Cutting part 21 Hydraulic unit 22 Pump 23 Motor 24 Solenoid valve 25 Control part 28 Operation part 30 Base 31 Scale plate 32 Display board 34 Cylinder 35 Piston 36 Hydraulic input part 37 Hydraulic output part 50 Pile chuck 51 Pile grip part 52 Grip part rotation Shaft portion 53 Cylinder 54 Connecting portion 55 Pile chuck shaft 56 Piston 57 Opening 58 Stopper 59 Protruding portion 60 Spiral 100 Existing pile removing device

Claims (2)

A hydraulic unit for supplying hydraulic pressure;
An auger that rotates the shaft by a rotation drive mechanism;
A hydraulic swivel installed around the shaft and transmitting hydraulic pressure supplied from the hydraulic unit;
A casing connected to the shaft and excavating around a pile buried in the ground;
A cutter connected to the lower part of the casing, moving inward of the casing and cutting the pile;
A cutter driving unit having an entry / exit mechanism of the cutter;
A control unit for controlling the cutter driving unit by hydraulic pressure transmitted from the hydraulic swivel based on an input for controlling the entering and exiting of the cutter;
A pile chuck for gripping and removing the cut pile,
The pile chuck is
A pile chuck shaft portion that is vertically installed and is connectable to a lower portion of the hydraulic swivel, and capable of rotation control.
A plurality of gripping portions for gripping the pile;
A gripping part rotating shaft part connected to the pile chuck shaft part and rotatably installed at a substantially central part of the plurality of gripping parts,
A hydraulic cylinder for rotating the plurality of gripping portions;
A plurality of connecting portions that are pivotally connected to the plurality of gripping portions and pistons of the hydraulic cylinder, and are configured to open and close the plurality of gripping portions in response to the pistons coming in and out. The existing pile removal device as a feature. A hydraulic unit for supplying hydraulic pressure;
An auger that rotates the shaft by a rotation drive mechanism;
A hydraulic swivel installed around the shaft and transmitting hydraulic pressure supplied from the hydraulic unit;
A casing connected to the shaft and excavating around a pile buried in the ground;
A cutter connected to the lower part of the casing, moving inward of the casing and cutting the pile;
A cutter driving unit having an entry / exit mechanism of the cutter;
A control unit for controlling the cutter driving unit by hydraulic pressure transmitted from the hydraulic swivel based on an input for controlling the entering and exiting of the cutter;
A pile chuck for gripping and removing the cut pile;
Burying the casing around the pile; and
Cutting the pile with the cutter;
Removing the embedded casing at a connecting portion, and connecting the lot and the pile chuck to the hydraulic swivel;
Grabbing the upper part of the cut pile with the pile chuck and taking it out;
With the casing buried to the bottom of the pile, the pile chuck is lowered to the position of the tip of the pile that could not be taken out in the previous take-out step, and the tip of the pile is moved by the pile chuck. Grasping and removing, and
A step of removing the casing; and a method for removing an existing pile.