JP7249216B2 - CONCRETE WALL REMOVAL DEVICE AND CONCRETE WALL REMOVAL METHOD - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete wall removing device and a concrete wall removing method.

A technique for removing a concrete wall cut from an existing concrete structure is known. For example, in Patent Document 1, when a concrete wall block body is removed from an existing reinforced concrete structure, a lower horizontal cutting line is formed first, and before forming the upper horizontal cutting line, a guide rail is disclosed. One end of each guide rail is inserted into a hole provided on the lower horizontal cutting line, and the other end of each guide rail is extended to the edge of the pedestal. Once the upper horizontal cut line is made, the blocks are separated and rest on the guide rails. A block pulled out sideways from a reinforced concrete structure slides on a guide rail to be mounted on a receiving frame.

Japanese Patent No. 3647933

By the way, there is a demand for further improvement in the efficiency of removing existing concrete walls.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a concrete wall removing apparatus and a concrete wall removing method capable of improving the efficiency of removing an existing concrete wall.

The present invention relates to a concrete wall removing apparatus for removing a concrete wall cut from an existing concrete structure, comprising: a pedestal on which the concrete wall cut from the concrete structure is mounted; a moving part that moves the pedestal, a drawer that pulls out the concrete wall cut from the concrete structure to the pedestal, and a drawer that prevents the concrete wall drawn to the pedestal from overturning. The overturn prevention part has a traction part that pulls the concrete wall and a support part that supports the concrete wall pulled by the traction part, and the concrete wall is pulled by the traction part and supported by the support part. The concrete wall is prevented from overturning by maintaining the posture of the wall. It is pulled out to the mounting surface by the drawer part through.
The support portion has a rod portion that is slidably supported and has an abutment portion that abuts against the wall surface of the concrete wall. Supports a concrete wall towed by a towing unit.

According to this configuration, in the concrete wall removing device for removing the concrete wall cut from the existing concrete structure, the concrete wall cut from the concrete structure is placed on the pedestal. Since the pedestal part is moved up and down by the elevating part, the concrete wall cut at any position in the vertical direction can be more easily placed on the pedestal part. Since the gantry is moved by the moving part, the concrete wall removed from the concrete structure can be transported to an arbitrary position. The concrete wall cut from the concrete structure is pulled out to the pedestal by the drawer part, and the overturn prevention part prevents the concrete wall pulled out to the pedestal by the drawer part from overturning, so that the vertical dimension is increased. A concrete wall that has been cut into pieces can be removed from the concrete structure as it is and transported. Therefore, it is possible to improve the efficiency of removing the existing concrete wall.

In this case, it is preferable to further include a reaction force offsetting portion that offsets the reaction force generated when the lead-out portion pulls out the concrete wall by coming into contact with the concrete structure.

According to this configuration, since the reaction force canceling portion abuts against the concrete structure, the reaction force generated when the draw-out portion draws out the concrete wall is offset, so that the existing concrete wall can be removed more stably. can be done.

According to this structure, the overturn prevention part has a traction part for pulling the concrete wall and a support part for supporting the concrete wall towed by the traction part. Since the overturning of the concrete wall is prevented by maintaining the posture, the overturning of the concrete wall can be prevented with a simple configuration.

Further, a guide part that closes at least a part of the gap between the mounting surface and the concrete structure by extending along the mounting surface on which the concrete wall of the pedestal part is mounted up to the concrete structure. Further provision is preferred.

According to this configuration, the guide portion extends to the concrete structure along the mounting surface on which the concrete wall of the pedestal portion is mounted, so that at least the gap between the mounting surface and the concrete structure is Since a part of the concrete wall is closed, it is possible to reduce the possibility that the concrete wall pulled out to the pedestal part by the drawer part falls into the gap between the mounting surface and the concrete structure.

The present invention also provides a concrete wall removing method for removing a concrete wall cut from a concrete structure using the concrete wall removing apparatus of the present invention.

In this case, the concrete structure is a tunnel for the passage of railway vehicles buried in the ground, and the upper slab extending from the top of the tunnel to the side of the tunnel and the With the extending lower slab and the pillars positioned between the upper and lower slabs installed, the pedestal part is placed between the concrete wall of the tunnel and the pillars, and the anti-tipping part keeps the concrete wall in place. The concrete wall cut from the tunnel is pulled out to the pedestal by the pull-out part while preventing the toppling of the tunnel, and the concrete wall cut from the tunnel is pulled out through the path between the concrete wall of the tunnel and the pillar by the moving part. You may move the mount part mounted.

According to this configuration, the concrete structure is a tunnel for passage of railroad vehicles buried in the ground. With the laterally extending lower slab and the stanchion positioned between the upper slab and the lower slab installed, the cradle section is positioned between the concrete wall of the tunnel and the stanchion, and the anti-tipping section is installed. While preventing the concrete wall from overturning, the drawer pulls out the concrete wall cut from the tunnel to the pedestal, and the moving unit cuts it from the tunnel through the path between the concrete wall of the tunnel and the pillar. In order to move the pedestal on which the concrete wall is placed, for example, in the case of expanding the railway station of the subway, the narrow space between the concrete wall of the tunnel and the support can be used while maintaining the passage of railway vehicles. can be used to remove existing concrete walls.

According to the concrete wall removing apparatus and the concrete wall removing method of the present invention, it is possible to improve the efficiency of removing the existing concrete wall.

(A) is a front view of the concrete wall removing apparatus according to the embodiment, (B) is a left side view of (A), and (C) is a plan view of (A). FIG. 10 is a perspective view showing a state in which the reaction force canceling portion and the guide portion are accommodated in the pedestal portion, and the support portion is retracted to the side opposite to the concrete wall; FIG. 4 is a perspective view showing a state in which the reaction force canceling portion and the guide portion are extended from the base portion toward the concrete structure, and the support portion is advanced toward the concrete wall; FIG. 2 is a cross-sectional view showing a state in which an upper slab, a lower slab, and columns are installed in a tunnel for railroad vehicle passage; (A) is a front view showing a step of pulling out a concrete wall cut from a concrete structure to a pedestal by the method for removing a concrete wall according to the embodiment, and (B) is a left side view of (A). (A) is a front view showing a step of lowering the pedestal on which the concrete wall is placed in the method for removing the concrete wall according to the embodiment, and (B) is a left side view of (A). (A) is a front view showing a step of moving a pedestal on which a concrete wall is placed in the method for removing a concrete wall according to the embodiment, and (B) is a left side view of (A). FIG. 5 is a cross-sectional view showing a state in which a concrete wall has been removed from the tunnel of FIG. 4 and a platform has been installed;

EMBODIMENT OF THE INVENTION Hereafter, embodiment of the concrete wall removal apparatus which concerns on this invention, and a concrete wall removal method is described in detail, referring drawings. As shown in FIGS. 1(A), 1(B) and 1(C), the concrete wall removing apparatus 1 of this embodiment removes a concrete wall 201 cut from an existing concrete structure 200 into a concrete structure. Removed from 200. The concrete wall removing device 1 includes a bogie frame 2 at the bottom of the concrete wall removing device 1, a front frame 3 extending upward from the front portion of the bogie frame 2, and a rear frame extending upward from the rear portion of the bogie frame 2. 4.

The concrete wall removing device 1 includes a pedestal section 10 , an elevating section 20 , a moving section 30 , a drawer section 40 and an overturn prevention section 50 . A concrete wall 201 cut from a concrete structure 200 is placed on the pedestal 10 . The pedestal part 10 has a mounting surface 11 on which the concrete wall 201 is mounted. Moreover, the gantry part 10 has a pair of stages 12 arranged along the front-rear direction of the concrete wall removing apparatus 1 on the left edge of the gantry part 10 . The stage 12 forms a plane that is one step higher than the mounting surface 11 .

The elevating unit 20 elevates the gantry unit 10 . The lifting section 20 has links 21 and 22 , a piston rod 23 , a cylinder 24 and a hydraulic unit 25 . The links 21 and 22, the piston rods 23 and the cylinders 24 are arranged on both the left and right sides of the concrete wall removing device 1 one by one. The link 21 and the link 22 are connected at their central portions so as to be rotatable about an axis extending in the lateral direction of the concrete wall removing apparatus 1 .

The upper end of the link 21 is connected to the lower surface of both side edges of the front end of the pedestal 10 so as to be rotatable around the axis of the concrete wall removing apparatus 1 along the left-right direction. The lower end of the link 21 is connected to the upper surface of both side edges of the bogie frame 2 so as to be slidable along the longitudinal direction of the concrete wall removing apparatus 1 . The upper end of the link 22 is connected to the lower surface of both side edges of the pedestal 10 so as to be slidable along the front-rear direction of the concrete wall removing apparatus 1 . The lower end of the link 22 is connected to the upper surface of both side edges of the front end of the bogie frame 2 so as to be rotatable about the horizontal axis of the concrete wall removing apparatus 1 .

A piston rod 23 and a cylinder 24 are connected between the link 21 and the link 22 . A tip portion of a piston rod 23 is connected to the link 22 so as to be rotatable around an axis extending in the horizontal direction of the concrete wall removing apparatus 1 . An end portion of a cylinder 24 accommodating a piston of a piston rod 23 is connected to the link 21 so as to be rotatable around an axis along the horizontal direction of the concrete wall removing apparatus 1 . The hydraulic pressure supplied from the hydraulic unit 25 causes the piston rod 23 and the cylinder 24 to extend and contract. As the piston rod 23 and the cylinder 24 between the link 21 and the link 22 expand and contract, the elevating section 20 elevates the pedestal section 10 .

The moving part 30 moves the concrete wall removing device 1 having the pedestal part 10 . The moving part 30 has four wheels 31 for running on a pair of rails 210 . The moving unit 30 has a motor 32 that drives wheels 31 . The moving part 30 has four rail clamps 33 that clamp the rails 210 to fix the concrete wall removing device 1 having the pedestal part 10 to the rails 210 .

The pull-out section 40 pulls out the concrete wall 201 cut from the concrete structure 200 to the pedestal section 10 . The drawer 40 has four wires 41 , a lever hoist 42 and a pulley 43 . The wire 41 has one end 41 a fixed to the bogie frame 2 , extends through the lever hoist 42 and the pulley 43 , and has the other end 41 b fixed to the bottom of the concrete wall 201 . A lever hoist 42 provides the necessary tension to the wire 41 on the left side of the concrete wall removing device 1 . Two pulleys 43 are arranged on the top surface of each of the two stages 12 of the pedestal 10 . The pulley 43 changes the direction of the wire 41 extending upward from the bogie frame 2 to the direction of the concrete wall 201 while sliding the wire 41 . The wire 41 is tensioned by the lever hoist 42 so that the pull-out portion 40 pulls the concrete wall 201 out to the pedestal portion 10 .

The overturn prevention part 50 prevents overturn of the concrete wall 201 pulled out to the gantry part 10 by the drawer part 40 . The overturn prevention portion 50 has a pulling portion 60 that pulls the concrete wall 201 and a support portion 70 that supports the concrete wall 201 pulled by the pulling portion 60 . By maintaining the attitude of the concrete wall 201 by being pulled by the traction part 60 and supported by the support part 70, the overturn prevention part 50 prevents the concrete wall 201 from overturning.

The traction section 60 has a pair of wires 61 , a lever hoist 62 and a pulley 63 . The wire 61 has one end 61 a fixed to the bogie frame 2 , extends through the lever hoist 62 and the pulley 63 , and has the other end 61 b fixed to the upper part of the wall surface of the concrete wall 201 . A lever hoist 62 provides the necessary tension to the wire 61 on the left side of the concrete wall removing device 1 . The pulley 63 is arranged on the ceiling and changes the direction of the wire 61 extending upward from the bogie frame 2 to the direction of the concrete wall 201 while sliding the wire 61 . The wire 61 is tensioned by the lever hoist 62 so that the traction unit 60 pulls the concrete wall 201 .

As shown in FIGS. 1(A), 1(B), 1(C) and 2, the support portion 70 has four pillar portions 71 and rod portions 72 . Two pillars 71 are arranged on the upper surface of each of the two stages 12 of the pedestal 10 . The column portion 71 has its lower end fixed to the stage 12 of the pedestal portion 10, extends upward, and includes a rod support portion 71g at its upper end. As shown in FIGS. 2 and 3, the rod support portion 71g supports the rod portion 72 extending in the horizontal direction of the concrete wall removing device 1 so as to be slidable in the horizontal direction of the concrete wall removing device 1. As shown in FIGS.

Further, the rod support portion 71g changes the projection length of the rod portion 72 in the right direction (toward the concrete wall 201) of the concrete wall removing apparatus 1 in a stepwise or stepless manner, and the rod portion 72 is moved to the rod support portion. It can be fixed at 71g. For example, a plurality of holes are provided along the longitudinal direction in the side surface of the rod portion 72, and pins, bolts, or the like can be inserted into the rod portion 72 through the holes provided in the rod support portion 71g. By being inserted into one of the holes in the side surface portion, the rod portion 72 can be fixed to the rod support portion 71g while changing the projecting length of the rod portion 72 in stages. Further, when the concrete wall removing device 1 is moved, the rod portion 72 can be removed from the rod support portion 71g so as not to interfere with the movement of the concrete wall removing device 1 .

The rod portion 72 includes a contact portion 72c at its distal end and a handle portion 72h at its distal end. The contact portion 72 c contacts the wall surface of the concrete wall 201 . The handle portion 72h is gripped during an operation to change the projecting length of the rod portion 72. As shown in FIG. The support portion 70 supports the concrete wall 201 pulled by the pulling portion 60 by the contact portion 72c of the fixed rod portion 72 contacting the wall surface of the concrete wall 201 while the projection length is changed. Supporting the concrete wall 201 pulled by the pulling part 60 means not only supporting the concrete wall 201 by always contacting the contact part 72c with the concrete wall 201, but also supporting the concrete wall 201 pulled by the pulling part 60. This includes supporting the concrete wall 201 by abutting the abutment portion 72c that is close to the concrete wall 201 when the wall 201 is inclined.

As shown in FIGS. 1(A), 1(B), 1(C) and 2, the concrete wall removing device 1 contacts the right side surface of the pedestal 10 with the concrete structure 200, Three reaction force canceling parts 80 for canceling the reaction force generated when the drawer part 40 draws out the concrete wall 201 are provided. As shown in FIGS. 2 and 3, the reaction force canceling part 80 has a columnar shape, and changes the projection length of the concrete wall removing device 1 in the right direction (toward the concrete wall 201) in a stepwise or stepless manner. and its tip abuts the concrete structure 200 .

A handle portion 80 h is provided at a position corresponding to the reaction force canceling portion 80 on the left side portion of the gantry portion 10 . For example, the handle portion 80h is connected to a ball screw screwed into the pedestal portion 10 . The reaction force canceling portion 80 is connected with the nut of the ball screw. By rotating the handle portion 80h, the projecting length of the reaction force canceling portion 80 can be changed steplessly.

As shown in FIGS. 1(A), 1(B), 1(C) and 2, the concrete wall removing apparatus 1 has a concrete wall 201 of the pedestal 10 placed on the right side of the pedestal 10. Four guide portions 90 are provided that close at least part of the gap G between the mounting surface 11 and the concrete structure 200 by extending along the mounting surface 11 to the concrete structure 200 . “Along the mounting surface 11” means that the upper surface of the guide portion 90 coincides with the mounting surface 11 and that there is a height difference of about 1 to 50 mm between the upper surface of the guide portion 90 and the mounting surface 11. including. As shown in FIGS. 2 and 3, the guide part 90 can change the projection length of the concrete wall removing device 1 in the right direction (in the direction of the concrete wall 201) in a stepwise or stepless manner. part abuts the concrete structure 200 . The guide part 90 has a prism shape, and its upper surface is a smooth plane on which the concrete wall 201 pulled out by the lead-out part 40 can slide.

A handle portion 90 h is provided at a position corresponding to the guide portion 90 on the left side portion of the gantry portion 10 . For example, the handle portion 90h is connected to a ball screw screwed into the pedestal portion 10 . The guide part 90 is connected with the nut of the ball screw. By rotating the handle portion 90h, the projection length of the guide portion 90 can be changed steplessly.

As shown in FIGS. 1(A), 1(B) and 1(C), the concrete wall removing apparatus 1 includes a control panel for controlling the operation of the hydraulic unit 25 of the lifting section 20 and the motor 32 of the moving section 30. 100.

A concrete wall removing method for removing the concrete wall 201 cut from the concrete structure 200 from the concrete structure 200 using the concrete wall removing apparatus 1 of the present embodiment will be described below. In the following description, as shown in FIG. 4, the concrete structure 200 is a tunnel 300 buried underground E for railway vehicles to pass through. The circumference of the tunnel 300 has been excavated to construct a subway station platform or the like. A retaining wall 304 is installed on the side of the tunnel 300 , and a lining plate 305 is installed near the ground above the tunnel 300 .

An upper slab 301 extending from the top of the tunnel 300 to the side of the tunnel 300, a lower slab 302 extending from the bottom of the tunnel 300 to the side of the tunnel 300, and arranged between the upper slab 301 and the lower slab 302 A pillar 303 is installed. A plurality of pillars 303 are installed along the extending direction of the tunnel 300 . The distance between the concrete wall 201 of the tunnel 300 and the pillar 303 is about 1 m. In the following, an example of removing the concrete wall 201 of the tunnel 300 in order to construct a subway station platform or the like will be described.

As shown in FIGS. 5A and 5B, a protection wall 306 is installed on the inner wall surface side of the tunnel 300 . A plurality of bit holes are drilled for cutting the concrete wall 201 from the tunnel 300 while the protection wall 306 prevents excavation debris from scattering. A wire saw inserted through the bit hole cuts the concrete wall 201 from the tunnel 300 . During construction, a worker 401 is placed inside the tunnel 300 for monitoring as necessary.

A pair of rails 210 are arranged between the concrete wall 201 of the tunnel 300 and the support 303 . The concrete wall removing device 1 is moved on the rails 210 by the wheels 31 of the moving part 30 , and the pedestal part 10 of the concrete wall removing device 1 is arranged between the concrete wall 201 of the tunnel 300 and the support 303 . The concrete wall removing device 1 is fixed to the rail 210 by the rail clamp 33 in order to prevent the concrete wall removing device 1 from running away and overturning. The elevation unit 20 adjusts the height of the pedestal 10 so that the height of the lower end of the concrete wall 201 and the height of the mounting surface 11 of the pedestal 10 match.

A work scaffold 501 for a worker 402 to work is installed on the opposite side of the concrete wall removing apparatus 1 from the tunnel 300 . As shown in FIGS. 3, 5A, and 5B, the handle portion 80h and the handle portion 90h are operated by the worker 402, so that the reaction force canceling portion 80 is directed toward the outer wall surface of the tunnel 300. As shown in FIGS. and the guide portion 90 are extended, and the tip portions of the reaction force canceling portion 80 and the guide portion 90 come into contact with the outer wall surface of the tunnel 300 .

As shown in FIGS. 5A and 5B, the wire 41 and the lever hoist 42 of the drawer 40 are arranged via the pulley 43 . A pulley 63 is installed on the lower surface of the upper slab 301 . A wire 61 and a lever hoist 62 of the traction section 60 are arranged via a pulley 63 . As shown in FIGS. 3, 5A, and 5B, the rod portion 72 of the support portion 70 is pushed into the concrete by the worker 402 until the contact portion 72c contacts or approaches the concrete wall 201. As shown in FIGS. The wall 201 is advanced. As described above, the preparation for pulling out the concrete wall 201 cut from the tunnel 300 to the pedestal part 10 is completed.

As shown in FIGS. 5(A) and 5(B), the concrete wall 201 cut from the tunnel 300 is pulled out to the pedestal 10 by the lead-out portion 40 while the overturn prevention portion 50 prevents the concrete wall 201 from overturning. be The concrete wall 201 is pulled out to the frame part 10 by operating the lever hoist 42 of the drawer part 40 by the workers 403 and 404 . As the concrete wall 201 is pulled out by the pull-out portion 40 , the concrete wall 201 is towed by the workers 403 and 404 operating the lever hoist 62 of the towing portion 60 of the overturn prevention portion 50 . In response to the pulling of the concrete wall by the pulling portion 60, the contact portion 72c of the rod portion 72 of the support portion 70 is retracted by the worker 402 so as to keep contacting or approaching the concrete wall 201, whereby the pulling portion A concrete wall 201 pulled by 60 is supported.

By maintaining the attitude of the concrete wall 201 by being pulled by the pulling portion 60 and supported by the support portion 70, the concrete wall 201 is prevented from falling over. The contact of the reaction force canceling portion 80 with the tunnel 300 cancels out the reaction force generated when the lead-out portion 40 pulls out the concrete wall 201 . By extending the guide portion 90 along the mounting surface 11 of the pedestal portion 10 to the tunnel 300, a part of the gap G between the mounting surface 11 and the tunnel 300 is blocked, thereby The concrete wall 201 drawn out to the gantry part 10 by the drawer part 40 is prevented from falling into the gap G between the surface 11 and the tunnel 300 .

As shown in FIGS. 6A and 6B , the concrete wall 201 pulled out to the gantry 10 by the drawer 40 is fixed to the gantry 10 by a belt 502 . As shown in FIGS. 2, 6A, and 6B, the reaction force canceling portion 80 and the guide portion 90 are accommodated in the pedestal portion 10. As shown in FIGS. The working scaffold 501 is removed. The lifting section 20 lowers the gantry section 10 to the lowest position. The fixing of the concrete wall removing device 1 to the rail 210 by the rail clamp 33 is released.

As shown in FIGS. 7A and 7B, the rod portion 72 is removed from the rod support portion 71g so as not to interfere with the movement of the concrete wall removing device 1. As shown in FIGS. A concrete wall removing apparatus provided with a pedestal part 10 on which a concrete wall 201 cut from a tunnel 300 is placed by a moving part 30 via a path of a rail 210 between a concrete wall 201 of the tunnel 300 and a pillar 303. 1 is moved. After unloading the concrete wall 201 from the gantry 10 at an arbitrary location, the concrete wall 201 remaining in the tunnel 300 is subjected to the same process as described above.

As shown in FIG. 8, a platform 307 is installed after the concrete wall 201 has been removed. After that, the excavated part was backfilled, a part of the retaining wall 304, the lining board 305 and the protection wall 306 were removed, and the road and facilities on the road that existed at the position where the lining board 305 was installed is restored.

According to this embodiment, in the concrete wall removing device 1 for removing the concrete wall 201 cut from the existing concrete structure 200 from the concrete structure 200, the concrete wall cut from the concrete structure 200 is removed by the pedestal unit 10. 201 is placed. Since the pedestal part 10 is moved up and down by the elevating part 20 , the concrete wall 201 cut at an arbitrary position in the vertical direction can be more easily placed on the pedestal part 10 . Since the gantry part 10 is moved by the moving part 30, the concrete wall 201 removed from the concrete structure 200 can be transported to an arbitrary position. The concrete wall 201 cut from the concrete structure 200 is pulled out to the pedestal part 10 by the lead-out part 40, and the overturn prevention part 50 prevents the concrete wall 201 pulled out to the pedestal part 10 by the lead-out part 40 from overturning. The concrete wall 201 that has been cut so as to increase the dimension in the direction can be removed from the concrete structure 200 in the same posture and transported. Therefore, the efficiency of removing the existing concrete wall 201 can be improved.

Furthermore, during movement, the pedestal part 10 on which the concrete wall 201 is placed can be lowered to a lower position by the lifting part 20, so that the stability of the concrete wall removing apparatus 1 during movement can be improved. can.

Further, according to the present embodiment, since the reaction force canceling portion 80 abuts against the concrete structure 200, the reaction force generated when the lead-out portion 40 pulls out the concrete wall 201 is offset. concrete wall 201 can be removed.

Further, according to the present embodiment, the overturn prevention portion 50 includes the traction portion 60 that pulls the concrete wall 201 and the support portion 70 that supports the concrete wall 201 pulled by the traction portion 60 . Since the concrete wall 201 is prevented from overturning by maintaining the attitude of the concrete wall 201 by being pulled by the support member 70 and supported by the support portion 70, the overturning of the concrete wall 201 can be prevented with a simple configuration.

In addition, according to the present embodiment, the guide portion 90 extends along the mounting surface 11 on which the concrete wall 201 of the pedestal portion 10 is mounted to reach the concrete structure 200, so that the mounting surface 11 and the concrete Since at least a part of the gap G between the structure 200 is closed, the concrete wall 201 pulled out to the pedestal part 10 by the drawer part 40 falls into the gap G between the mounting surface 11 and the concrete structure 200. - 特許庁can be reduced.

Further, according to the present embodiment, the concrete structure 200 is a tunnel 300 for passage of railway vehicles buried underground, and an upper slab 301 extending from the upper part of the tunnel 300 to the side of the tunnel 300. Then, with the lower slab 302 extending from the lower part of the tunnel 300 to the side of the tunnel 300 and the struts 303 arranged between the upper slab 301 and the lower slab 302 installed, the gantry part 10 is installed in the tunnel. The concrete wall 201 is placed between the concrete wall 201 and the support 303 of 300, and the concrete wall 201 cut from the tunnel 300 is pulled out to the pedestal part 10 by the lead-out part 40 while preventing the concrete wall 201 from overturning by the overturn prevention part 50, In order to move the pedestal part 10 on which the concrete wall 201 cut from the tunnel 300 is placed by the moving part 30 through the path between the concrete wall 201 of the tunnel 300 and the pillar 303, for example, When expanding a railway station, it is possible to remove the existing concrete wall 201 by utilizing the narrow space between the concrete wall 201 of the tunnel 300 and the pillar 303 while maintaining the traffic of the railway vehicle. .

The present invention can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art, including the embodiment described above. Moreover, it is also possible to configure a modified example using the technical matters described in the above-described embodiments. For example, the moving part 30 may have tires or tracks that run on the floor instead of running on the rails 210 .

In addition, the rod support portion 71g of the support portion 70 of the overturn prevention portion 50 has a hinge mechanism. It may be arranged so as not to interfere with the movement of the concrete wall removing device 1 during movement. Moreover, the rod portion 72 may have a nested structure and be flexible.

In addition, the reaction force canceling portion 80 has a flat plate shape, and the projection length of the concrete wall removing device 1 in the direction of the concrete wall 201 can be changed stepwise or steplessly. 200 may abut. Further, the guide portion 90 has a flat plate shape and extends along the mounting surface 11 on which the concrete wall 201 of the pedestal portion 10 is mounted until reaching the concrete structure 200, so that the mounting surface 11 and the concrete structure are separated from each other. The entire gap G between the body 200 may be closed. The upper surface of the flat guide portion 90 is a smooth plane on which the concrete wall 201 drawn out by the drawer portion 40 can slide. Either one of the reaction force canceling portion 80 and the guide portion 90 may be omitted, and the reaction force canceling portion 80 may also serve as the guide portion 90 , or the guide portion 90 may also serve as the reaction force canceling portion 80 .

Further, the shape, position and quantity of the drawer portion 40, the pulling portion 60, the support portion 70, the reaction force canceling portion 80 and the guide portion 90 of the above embodiment may be changed as appropriate.

DESCRIPTION OF SYMBOLS 1... Concrete wall removal apparatus, 2... Bogie frame, 3... Front frame, 4... Rear frame, 10... Base part, 11... Placement surface, 12... Stage, 20... Lifting part, 21, 22... Link, 23... Piston rod 24 Cylinder 25 Hydraulic unit 30 Moving unit 31 Wheel 32 Motor 33 Rail clamp 40 Drawer 41 Wire 41a One end 41b The other end 42 Lever hoist 43 Pulley 50 Overturn prevention part 60 Traction part 61 Wire 61a One end 61b Other end 62 Lever hoist 63 Pulley 70 Support part 71 Column part 71g rod support portion 72 rod portion 72h handle portion 72c contact portion 80 reaction force canceling portion 80h handle portion 90 guide portion 90h handle portion 100 control panel 200 Concrete structure 201 Concrete wall 210 Rail 300 Tunnel 301 Upper slab 302 Lower slab 303 Support 304 Retaining wall 305 Covering plate 306 Protective wall 307 Platform 401, 402, 403, 404 Worker 501 Work platform 502 Belt G Gap E Underground.

Claims (6)

A concrete wall removing device for removing a concrete wall cut from an existing concrete structure,
a pedestal on which the concrete wall cut from the concrete structure is mounted;
an elevating unit that elevates the pedestal;
a moving unit that moves the pedestal;
a drawer for drawing out the concrete wall cut from the concrete structure to the mount;
an overturn prevention unit that prevents overturning of the concrete wall that is pulled out to the pedestal unit by the drawer unit;
with
The fall prevention part is
a pulling part for pulling the concrete wall;
a support portion that supports the concrete wall towed by the towing portion;
has
preventing the concrete wall from overturning by maintaining the posture of the concrete wall by being pulled by the pulling part and supported by the supporting part ;
The pedestal part has a mounting surface on which the concrete wall is mounted,
The concrete wall is pulled out to the mounting surface by the drawer section through a gap between the mounting surface and the concrete structure.
Concrete wall removal equipment. The support portion has a rod portion that is slidably supported and has a contact portion that contacts the wall surface of the concrete wall,
The support portion supports the concrete wall pulled by the pulling portion by the contact portion of the rod portion coming into contact with the wall surface of the concrete wall.
The concrete wall removing device according to claim 1. 3. The concrete wall removing apparatus according to claim 1 , further comprising a reaction force offsetting portion that offsets a reaction force generated when said pull-out portion pulls out said concrete wall by coming into contact with said concrete structure. At least part of the gap between the mounting surface and the concrete structure is closed by extending along the mounting surface on which the concrete wall of the pedestal part is mounted to reach the concrete structure. The concrete wall removing device according to any one of claims 1 to 3 , further comprising a guide part. A concrete wall removing method for removing the concrete wall cut from the concrete structure by using the concrete wall removing apparatus according to any one of claims 1 to 4 . The concrete structure is a tunnel for passage of railroad vehicles buried in the ground,
an upper slab extending from the top of the tunnel to the sides of the tunnel;
a lower slab extending laterally of the tunnel from a lower portion of the tunnel;
a strut positioned between the upper slab and the lower slab;
is installed,
placing the pedestal part between the concrete wall of the tunnel and the support;
While preventing the concrete wall from overturning by the overturn prevention part, the drawer part draws out the concrete wall cut from the tunnel to the pedestal part;
6. The system according to claim 5 , wherein the moving part moves the pedestal part on which the concrete wall cut from the tunnel is placed via a path between the concrete wall of the tunnel and the pillar. Concrete wall removal method.

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