JPH07189254A - Sheathing device - Google Patents

Abstract

PURPOSE:To improve the efficiency of sheathing operation by mutually adjoining a sheet pile unit and a plurality of sheet piles in the verticality of the sheet pules of a plurality and holding each of the sheet piles by bearing frames in a vertically movable manner. CONSTITUTION:When a sheathing device 21 is installed, the sheathing device 21 under the state, in which the sheet pile units 22, 22 of the sheathing device 21 are shortened on the ground, is hung up by using a conveyor and carried to a position to be mounted and hung down in a ditch first. The width of the sheet pile units 22, 22 is extended, and sheet piles 24... are pushed against a soil wall and earth pressure is supported. When aimed burying construction is completed and the sheathing device 21 is removed, the width of the sheet pile units 22, 22 of the sheathing device 21 is shrunk in the ditch, hung up and removed by the conveyor, and conveyed to the next erection location. When there is an obstruction 99 such as a previously buried article in the ditch, a plurality of sheet piles 24... are held to the bearing frames 25 of the sheet piles 22 in a vertically movable manner respectively, and only the sheet pile 24 abutted against the obstruction 99 is placed and installed to an upper section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil retaining device for preventing a soil wall in a groove or a hole formed by excavating the soil from collapsing in a construction for burying various facilities in the soil. is there.

[0002]

2. Description of the Related Art As is well known, in the work of burying water and sewer pipes, gas pipes, power lines, telephone lines, etc. in the road, first the road is excavated in a groove shape to prevent the collapse of the earth wall on both sides of the groove. The most commonly used method is to carry out soil retaining work to do so, then perform the desired burying work for water pipes, etc., and then remove the soil retaining member and finally refill the groove. Among these series of work, the excavation work of the ditch on the ground and the backfilling work can be performed efficiently by using the excavating machine such as the backhoe, but the mechanization of the soil retention work of the excavated ditch is sufficiently realized. The reality is that it is done manually by the workers.

That is, when trenches are excavated on the ground, sheet piles are built one by one on both sides of the trenches using heavy equipment,
After that, a worker of a predetermined number of people enters into the groove, raises the belly from the worker on the ground, receives the cutting beam, and supports a plurality of sheet piles by these to perform the work manually. Then, even when removing the soil retaining member after the completion of the intended burying work of the water pipe, etc., a worker of a predetermined number of people enters the groove and manually removes the cutting beam and the abdomen to remove them. After handing over to the worker on the ground, the sheet piles are pulled out one by one using a heavy machine and finally the groove is backfilled. It is not preferable from the viewpoints of safety and hygiene that a worker manually performs such abdominal upset and installation / removal of a girder is a heavy labor and has a low work efficiency. From the above, effective improvement measures that can improve efficiency and rationalize soil retaining work have been demanded.

Therefore, as means for solving the above problems, those shown in FIGS. 6 and 7 have been proposed conventionally. The supporting unit 1 of the sheet pile shown in FIG. 6 has a pair of bellow raising members 3 and 3 respectively supporting a plurality of sheet piles 2 built in on both sides of the groove, and the bellow raising members 3 and 3 separated from each other in the longitudinal direction. And the supporting members 4 and 4 that are arranged in the same manner and that support the belly members 3, 3 so that they can be separated and approached. These supporting members 4 and 4 are provided with a drive mechanism (not shown), and the sheet piles 2 with the bellows raising members 3 and 3 built in on both sides of the groove.
It can be pressed to. This support unit 1
Is a sheet pile 2 on both sides of the trench excavated in the ground as usual.
After erection, the bellows wadding members 3, 3 are hung in the groove by a heavy machine in a state of being narrowed, and in the groove, the bellows rising members 3, 3 are widened by the drive mechanism and pressed against the sheet pile 2. It is something to support. After burying the desired water pipes, etc., the support unit 1 is carried out of the groove by the heavy machine in a state where the bellows raising members 3, 3 are reduced in width, and then the sheet piles 2 ... The groove is backfilled.

Further, the soil retaining device 11 shown in FIG. 7 is a unit of a pair of panels supporting a soil wall and a girder. The pair of panels 12 and 12 facing each other and the lengths of the panels 12 and 12 are arranged in the longitudinal direction. .., which are respectively arranged at upper and lower positions on both ends in the direction, and which support the panels 12, 12 so as to be spaced apart and approachable, respectively. A drive mechanism (not shown) is arranged on the support members 13, 13 ..., and presses the panels 12, 12 against the soil walls on both sides of the groove. While the earth retaining device 11 has conventionally prevented the collapse of the soil walls on both sides of the groove by the sheet pile, the panel 12,
After the groove is excavated in the ground, the panels 12, 12 are arranged in the groove by a heavy machine in a state where the panels 12, 12 are reduced in width, and the panels 12 and 12 are arranged by the drive mechanism.
12 is widened and pressed against the soil wall to support it. After burying the desired water pipe or the like, the earth retaining device 11 is lifted and removed by a heavy machine in a state where both panels 12 and 12 are reduced in width, and finally the groove backfilling work is performed.

[0006]

By the way, in order to use the above-mentioned support unit 1, it is necessary to build a large number of sheet piles 2 ... As in the conventional case, and to pull them out after the burying work is completed. Since the installation / removal work of No. 1 requires a considerable amount of time and labor, it could not be said that the soil retention work was sufficiently efficient.

Further, in the soil retaining device 11, when an obstacle such as an already buried object is present in the groove to be subjected to the soil retaining work, the panels 12 and 12 for pressing the soil wall come into contact with the obstacle to retain the soil. There is a problem that the device 11 cannot be installed.

The present invention has been made in view of the above circumstances, and realizes mechanization of earth retaining work of a groove excavated in the ground to save labor and improve work efficiency. An object of the present invention is to provide an earth retaining device that can cope with an obstacle such as an existing buried object existing in the groove.

[0009]

In order to achieve the above object, a soil retaining device according to a first aspect of the present invention has a pair of sheet pile units arranged to face each other along a vertical plane, and the sheet pile units are separated from each other. It comprises a support / moving mechanism for supporting the units freely and moving them in a separating / approaching direction.The sheet pile unit includes a plurality of sheet piles and a plurality of sheet piles that are adjacent to each other in a vertical plane, and And a support frame that is held so as to be movable in the vertical direction.

[0010]

In the soil retaining device of the present invention, the pair of sheet pile units move in the separating / approaching direction by operating the moving mechanism. Therefore, for example, when the soil retaining device is carried into a groove formed by excavating the ground and the pair of sheet pile units are separated by the moving mechanism, the sheet pile units come into contact with the soil wall surface in a pressure contact state. In this state, the pair of sheet pile units functions as a soil retaining member. Further, when there is an obstacle at the place where the sheet pile unit is installed, the vertical position of the sheet pile forming the sheet pile unit is adjusted with respect to the portion where the obstacle is present, and the sheet pile unit is thus installed at the determined position.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The soil retaining device 21 is arranged between the pair of sheet pile units 22 and 22 and both ends of the sheet pile units 22 and 22, and separates the sheet pile units 22 and 22 from each other.
A scissor lift mechanism (supporting / moving mechanism) 23 that supports the moving body and moves them in a separating / approaching direction,
23 and 23. The sheet pile unit 22 is composed of a plurality of sheet piles 24 ... And a support frame 25 that supports these sheet piles 24. Further, the support frame 25 is provided with support portions 31 and 31 located at the front and rear ends of the soil retaining device 21, and these support portions. Bellows raising member 3 having both ends fixed to the parts 31, 31
2 and 32, and guide frames 33, which are installed on the bellows raising members 32 and 32 and hold both side portions of the sheet pile 24. In addition, engagement parts 34, 34 used when hoisting the soil retaining device 21 are provided on the upper surface of the bellows raising member 32 arranged at the uppermost position.

The support portion 31 has columns 41, 41. The columns 41, 41 are connected by a connecting member 42 at the upper end and a connecting member 43 at the lower side, and further, a reinforcing plate is provided at the center and bottom in the vertical direction. 45, 4
6 is fixed.

The scissor lift mechanism 23 is composed of link members 51, 51 and 52 and a rotating mechanism 53 thereof. The link members 51, 51 are arranged in parallel, and their upper ends are supported by the pins 54 by the columns 41, 41.
(The left side in FIG. 2) is rotatably connected to the upper part, and the lower end is rotatably connected to a lower part of the columns 41, 41 (right side in FIG. 2) facing the columns 41, 41 by a pin 55. Has been done. The pin 55 is attached to the elongated holes 56, 56 formed in the columns 41, slidably in the vertical direction. In addition, the link member 52
Are located so as to intersect with the link members 51, 51, and their upper and lower ends are connected to the columns 41 ... In the opposite direction to the link members 51, 51. That is, the upper end of the link member 52 is rotatably connected to the upper part of the pillars 41, 41 (on the right side in FIG. 2) to which the lower ends of the link members 51, 51 are attached by a pin 57, and the lower end of the link member 51, 51. Posts 41 with the upper end attached
(Left side in FIG. 2) It is rotatably connected to the lower side by a pin 58, and this pin 58 is attached to the elongated holes 59, 59 formed in the columns 41, 41 so as to be slidable in the vertical direction. The link members 51, 51 and 52 are rotatably connected to each other by a pin 60 at the central portion in the longitudinal direction thereof.

The rotating mechanism 53 includes a rod 71 having an external thread, a handle 72 for rotating the rod 71,
Female threaded support member 73 screwed onto rod 71
And a mounting member 74 that regulates the vertical position of the lower end of the rod 71 and holds the rod 71 rotatably.
The support member 73 is connected to the link member 5 by the pins 75 and 75.
1, 51 are rotatably attached, and the attachment member 74 is rotatably attached to the link member 52 by a pin 76. With these configurations, the scissor lift mechanism 2
3, when the handle 72 is rotated, the length of the rod 71 between the support member 73 and the mounting member 74 changes, the angle at which the link members 51, 51 and 52 intersect, changes, and the sheet piles that are arranged facing each other. The units 22 and 22 can be moved in the separating / approaching directions to change the intervals between them.

A stopper 77 is attached to the upper end portion of the sheet pile 24, and when the earth retaining device 21 is lifted, the stopper 77 hits the bellow raising member 32 and the guide frame 33 arranged at the uppermost portion of the support frame 25. The sheet pile 24 comes into contact with the support frame 31 and prevents the sheet pile 24 from falling off the support frame 31. In FIG. 3, the stopper 77 is not shown in order to show the engagement state between the side portion of the sheet pile 24 and the guide frame 33.

To install the soil retaining device 21 in a trench excavated on the ground, for example, a transport device 81 shown in FIG. 4 is used. The carrying device 81 includes a gate-shaped frame 82.
And a caster 83 for moving the same, and a suspending mechanism 84 for suspending and supporting the earth retaining device 21 in the frame 82 so as to be able to move up and down.

The frame 82 has a pair of legs 85, 8
5 and a horizontal portion 86 that is laterally bridged at their upper ends. Further, the leg portion 85 is a lower frame 87,
The elevation frame 88 and the elevation mechanism 89 for elevating the elevation frame 88 with respect to the lower frame 87 are included. Further, the horizontal portion 86 includes a central frame 90,
Slide frames 91, 91 and each slide frame 9
It is composed of a slide mechanism 92 for sliding 1 with respect to the central frame 90. And legs 8
5, the upper end of the elevating frame 88 constituting the upper part of 5 and the slide frame 91 constituting both sides of the horizontal portion 86.
The tips of are connected and fixed in an orthogonal state to be integrated.
As a result, in the frame 82, the elevating mechanism 89 moves the elevating frame 88 up and down with respect to the lower frame 87, so that the leg portion 85 expands and contracts, and the height of the horizontal portion 86 can be freely adjusted. By sliding the slide frame 91 with respect to the central frame 90, the horizontal portion 86 expands and contracts, and the distance between the two leg portions 85, 85 can be freely adjusted.

Further, the above-mentioned suspension mechanism 84 includes the lower frame 87 of the leg portion 85 and the central frame 90 of the horizontal portion 86.
4 sets of 2 sheaves (pulleys), 2 attached to each of the sheaves 93, 94, and a predetermined length of the sheaves 93, 94 wound around the sheaves 93, 94 and having their base ends fixed to the distal end of the slide frame 91. It is composed of four wires 95. The hook 96 is attached to the tip of the wire 95, and the hook 96 is engaged with the engaging portion 34 arranged on the support frame 25 of the earth retaining device 21 to make the earth retaining device 21.
Suspend and support.

FIG. 5 shows a state in which the work of installing the soil retaining device 21 in the groove excavated on the ground is being carried out by using the transport device 81. In this installation work, first, the sheet pile units 22 and 22 of the soil retaining device 21 are contracted on the ground, and the soil retaining device 21 in this state is lifted by the transport device 81 to be transported to a position to be installed, and the inside of the groove T is moved. Hang on. After that, the sheet pile units 22 and 22 are widened and the sheet piles 24 are pressed against the soil wall to support the soil pressure. After the desired burial work is completed, the soil retaining device 21 can be removed by following the above procedure in reverse. That is, the sheet pile units 22 and 22 of the soil retaining device 21 are reduced in width in the trench T, and then lifted and removed by the transport device 81 and transported to the next installation location.

In the installation work of the soil retaining device 21, as shown in FIG. 1, an obstacle 99 such as an already buried object is placed in the groove.
, The supporting frame 25 of the sheet pile unit 22 holds the plurality of sheet piles 24 so that the sheet piles 24 can move in the vertical direction.
The earth retaining device 21 may be installed with only the chisel positioned above.

According to the earth retaining device 21 as described above, the plurality of sheet piles 24 are held by the support frame 25 to form the sheet pile unit 22, and the pair of sheet pile units 22, 2 facing each other.
Since 2 constitutes the earth retaining device 21 which is supported by the scissors lift mechanisms 23 and 23 and is integrated and installed in the groove, it is not necessary to build one sheet pile on each side surface of the groove for earth retaining work. There is no need for the worker to raise the belly manually and to install a cutting beam, and since the soil retaining device 21 is removed even after the completion of the intended burying work, it is not necessary to pull out the sheet piles one by one. Therefore, the efficiency of soil retaining work in the ditch is dramatically improved, the safety is secured, and the sanitary aspect is good. Further, since the soil retaining work which conventionally required the skill of the worker has been simplified, anyone can do it easily by a simple operation.

Further, when there is an obstacle in the excavated trench, only the sheet pile 24 which comes into contact with the obstacle among the plurality of sheet piles 24 constituting the sheet pile unit 22 is positioned above the earth retaining device 21. Can be installed. Further, when a high earth pressure is expected to be applied to a specific sheet pile 24 among the plurality of sheet piles 24 constituting the sheet pile unit 22, a long sheet pile 24 is used as the sheet pile 24, and only the sheet pile 24 is used. The lower end can be embedded in the ground to support high earth pressure. And a piece of sheet pile 24
If the damaged sheet pile 24 is damaged, the earth retaining device 21 can be continuously used by replacing only the damaged sheet pile 24 with a new sheet pile 24, which is excellent in economic efficiency.

A pair of sheet pile units 22 facing each other,
The spacing of 22 can be appropriately set by the scissor lift mechanisms 23, 23 arranged in front of and behind the soil retaining device 21, so that not only can a groove of any width be accommodated,
It is possible to cope with the case where the groove width is changed by independently driving the front and rear scissor lift mechanisms 23, 23.

Further, by adopting scissor lift mechanisms 23, 23 as the supporting / driving mechanism, the sheet pile units 22, 22 are supported at two upper and lower positions at the front and rear ends to have a stable structure, and have sufficient strength to support earth pressure. Front and rear scissor lift mechanism 2
Since the fulcrum at the center of the groove width is one point (the position where it is connected by the pin 60) in the sheet pile units 22 and 22 supporting section according to 3, it is easy to carry in materials such as pipes to be buried in the intended construction. Not only this, but also for workers who enter the groove for the work of connecting pipes, etc., it is easier for them to slip through this support part, and the pitch of the support part (conventional beam) is widened. Improves workability. Further, as compared with the support member 13 in the conventional soil retaining device 11 shown in FIG. 7, the scissor lift mechanism 23 can make the space between the sheet pile units 22, 22 narrower, so that the soil retaining device 21 as a whole can be made thinner. It can be done and it does not take up much space for storage and is easy to transport.

As described above, the soil retaining device 21 has a simple structure and mechanism and can be provided at a low cost.

In the above embodiment, the case where the stopper 77 is attached to the upper end portion of the sheet pile 24 in order to prevent the sheet pile 24 from falling off the support frame 25 has been described as an example. Has
For example, an appropriate method such as attaching a hook member to the sheet pile 24 may be adopted. In particular, due to the load limitation of the heavy equipment, only the pair of support frames 25, 25 and the scissors lift mechanism 23, 23 that are integrated are first installed in the groove, and then the sheet piles 24 are sequentially inserted into the guide frame 33. Needless to say, when configuring the soil retaining device 21, it is not necessary to attach the stopper 77 or the like to the sheet pile 24.

Further, the sheet pile 2 which constitutes the sheet pile unit 22.
Although the case where the number of the sheets 4 is 6 and the number of the wadding members that form the support frame 25 is 2 has been described as an example, these may be appropriately increased or decreased depending on the situation. Similarly, the support portion 3
The number of columns 41, connecting members 42, 43, and the arrangement / structure of the reinforcing plates 45, 46, etc., which compose one, may be appropriately adjusted.

Further, although the scissors lift mechanism 23 by human power is taken as an example of the device for supporting and moving the pair of sheet pile units 22, 22, power such as hydraulic pressure, water pressure, electric power may be used, or the supporting and movement may be performed. An appropriate device such as a cylinder mechanism may be adopted as the device.

[0029]

According to the soil retaining device of the present invention, the following effects can be obtained. That is, a plurality of sheet piles are held by a support frame to form a sheet pile unit, and a pair of opposing sheet pile units are supported by a supporting / moving mechanism to form an integrated soil retaining device and installed in a groove. There is no need to build sheet piles on both sides of the groove as work, and it is not necessary to manually raise the belly in the groove and set up a girder in the groove, and it is integrated even after the intended burial work is completed. It is not necessary to pull out the sheet piles one by one because they will be removed as converted soil retaining devices. Therefore, the efficiency of soil retaining work in the ditch is dramatically improved, the safety is secured, and the sanitary aspect is good. Further, since the soil retaining work which conventionally required the skill of the worker has been simplified, anyone can do it easily by a simple operation.

Further, since the supporting frame of the sheet pile unit can hold a plurality of sheet piles so as to be movable in the vertical direction, when an obstacle such as an existing buried object exists, only the sheet pile that abuts on the obstacle is present. It can be located and installed above. Furthermore, if a high earth pressure is expected to be applied to a specific sheet pile among the plurality of sheet piles that make up the sheet pile unit, it is possible to embed the lower end portion only in the sheet pile in the ground to support the high earth pressure. . When one sheet pile is damaged, the earth retaining device can be continuously used by replacing only the damaged sheet pile with a new sheet pile, which is excellent in economy.

[Brief description of drawings]

FIG. 1 is a front view in which a part of a soil retaining device that is an embodiment of the present invention is omitted.

FIG. 2 is a side view in which a part of the soil retaining device is omitted.

FIG. 3 is a plan view in which a part of the soil retaining device is omitted.

FIG. 4 is a side view showing a carrying device for carrying the soil retaining device.

FIG. 5 is a view showing a state where installation work is being carried out in the groove of the soil retaining device.

FIG. 6 is a perspective view of a conventionally used sheet pile support unit.

FIG. 7 is a perspective view of a conventional soil retaining device.

[Explanation of symbols]

 21 Soil retaining device 22 Sheet pile unit 23 Scissors lift mechanism (supporting / moving mechanism) 24 Sheet pile 25 Support frame

Front page continuation (72) Inventor Osamu Nakajima 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Toshiyuki Yamada 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph Phone Co., Ltd.

Claims (1)

[Claims] 1. A pair of sheet pile units arranged to face each other along a vertical plane, and a supporting / moving mechanism for supporting the sheet pile units so as to be spaced apart from and approaching each other and moving them in the spacing direction. The sheet pile unit includes a plurality of sheet piles, and a support frame that holds the plurality of sheet piles adjacent to each other in a vertical plane and holds each of them vertically movable.