JPH0420480B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to construction work such as extension, expansion, expansion, repair, reinforcement, etc. of platforms in subway premises. ) and a construction method for extending and expanding subway platforms based on this construction method.

[Conventional technology]

Conventionally, the method of dismantling and removing a premises wall built along a subway track is to excavate the outside of the premises wall to create a passageway space, and then remove the premises wall from both sides of the passageway space side and the track side. The material was then crushed or cut and dismantled using a vibrating crusher or a blade-type cutting machine that rotates a disc-shaped diamond blade.

[Problem that the invention seeks to solve]

However, the vibratory crusher used in the conventional construction method has a large impact on the external environment due to its intense vibration and noise, severely limits the crushing work time and working conditions, and requires reinforcement inside the walls of the premises. The reinforcing bars present in the pipes were a major hindrance to the crushing work, which caused problems such as slow crushing speed.

On the other hand, blade-type cutting machines are suitable for cutting reinforcing steel, but due to blade manufacturing and handling considerations, they are smaller and lighter, and the horsepower of the motor is also limited, so their cutting ability is inferior to reinforced concrete. , the cutting speed is extremely slow. Further, the cutting cross-sectional area is limited to a narrow range, and the maximum thickness that can be cut is about 300 to 400 mm. Therefore, for example, it is not only impossible to completely cut a building wall with a thickness of 700 mm or more from only one side, but even when cutting from both sides, even if it is possible to cut the internal reinforcing bars, the central In many cases, the rotary blade does not reach the parts that are not cut, and it is necessary to crush the uncut parts with a separate crusher. moreover,
When using a blade-type cutting machine, it is necessary to replace the blade one after another during a series of cutting operations, and this replacement operation interrupts the cutting operation and reduces work efficiency.

Further, in the case of cutting by rotation of such a disc-shaped blade, due to the manner of cutting, problems such as overcutting are inevitably required in areas where cutting is not required occur.

Furthermore, when using a blade-type cutting machine,
Scaffolding is built on the wall of the premises, and a guide rail is attached to drive the blade-type cutting machine, which is a small but heavy object.The cutting operator operates the blade-type cutting machine while being close to the wall. Because it required manual operation, there were major problems with safety and workability. In addition, when removing a cutting block from a premises wall after cutting with a blade-type cutting machine, the cutting gap is narrow due to the small thickness of the blade, and if the cutting block is suspended with a rail-type winch etc., it is necessary to remove it from a wall in the passageway. Because it was difficult to draw the structure into the ground, it was necessary to break open the upper part of the premises wall laterally to an appropriate width.

Furthermore, a serious problem with the conventional method is that, due to the crushing and cutting capabilities and crushing modes of the vibrating crusher and blade-type cutter, it is inevitable that crushing will occur not only from the aisle space side but also from the track side. Otherwise, cutting and dismantling work is required, and this means that the work time on the track side is limited due to the passage of vehicles on the track, and that workers on the track side are constantly exposed to danger due to mistakes in communication of vehicle traffic times, etc. It will be done. Work on the track side causes broken glass on the premises wall to scatter and fall onto the track side, especially on the tracks, which is not only dangerous for vehicle operation, but also requires the above-mentioned track side cutting work to remove and carry out the broken glass. It is accompanied by the same danger.

Therefore, it is an object of the present invention to cut the walls of subway premises, including internal reinforcing bars, accurately, efficiently and safely at extremely high cutting speeds without being limited by the cutting cross-sectional area or cutting thickness. Moreover, it is an object of the present invention to provide a construction method that allows cutting and removal in a state where the influence on the external environment such as vibration, noise, dust, etc. is extremely small.

Another object of the present invention is to be able to cut and remove a subway yard wall without requiring work from the track side, and to cut and remove a cutting block from the top of the yard wall in order to remove or pull in the cutting block from the yard wall. The object of the present invention is to provide a construction method that does not require drilling an opening.

Furthermore, another object of the present invention is to provide a method for extending and expanding a subway platform, which mainly involves the above-mentioned method for cutting and removing walls within the premises.

[Technical means to solve problems]

The cutting and removal method for subway premises walls according to the present invention is as follows:
(a) The process of drilling a passageway space on the outside of the premises wall built along the subway tracks, (b) Cutting by attaching ultra-hard beads to wire at appropriate pitches in the part of the premises wall to be cut. and (c) the step of driving the cutting cable by a cable drive device while controlling the traveling speed and tension, and cutting and dismantling the premises wall.

Furthermore, the method for extending and expanding a subway platform according to the present invention includes (a) a step of drilling a passage space outside an internal wall built along a subway track, and (b) constructing a new outer wall outside the passage space. (c) Wrapping a cutting cable made of wire with ultra-hard beads attached at appropriate pitches around the part of the premises wall to be cut; (d) Running the cutting cable by a cable drive device. This process consists of the process of driving the plant to travel under speed and tension control, cutting and dismantling the walls of the premises, and (e) the process of extending the new platform.

In the above, the cable drive device for running and driving the cutting cable is composed of, for example, a hydraulic motor, an electric motor, or other prime mover and a drive wheel rotationally driven by the drive wheel, and the cutting cable is hung on the drive wheel and runs. While being driven, it is pressed against the section of the premises wall that is to be cut.

The arrangement of the cutting cable between the drive wheel and the premises wall and the changing of the running direction of the cutting cable are carried out in the same way as in the case of rope transmission or belt transmission. This can be done freely by temporarily installing a guide pulley, etc. In addition, the running cutting cable is urged in the required direction so as to maintain the required tension at all times, and the tension is maintained or adjusted as the cutting and dismantling of the driving wheel, along with its attached equipment, progresses. This can be done by gradually moving backwards.

Additionally, if the above cable drive device is installed on the aisle space side, only the cutting cable that runs around the area to be cut will be exposed on the track side, eliminating the need for work on the track side when cutting. Become.

Note that so-called wire saws have been known for a long time, but they were used exclusively for cutting stone in quarries, and the inventor of the present invention
It was discovered that innovative effects can be achieved by applying this to a method for cutting and removing walls inside subway premises and a method for extending and expanding subway platforms in completely different industrial fields, and this led to the completion of the present invention. be.

[How to cut the premises wall using a cutting cable]

FIG. 1 is a perspective view illustrating an example of a method for cutting a yard wall using a cutting cable used in the present invention. Two possible supports 2 and 2a are temporarily installed in an immovable state by anchors or the like (not shown), and a geared cylindrical rack 3 is attached to these supports 2 and 2a to rotate around their axis. The rack 3 is mounted on a shaft in a fixed state so that the angle can be adjusted, and a self-propelled platform 4 is fitted into the rack 3 so as to be movable in the axial direction.

The self-propelled platform 4 includes a drive wheel 5, a drive wheel rotation mechanism 6 consisting of a hydraulic motor for rotationally driving the drive wheel, a continuously variable transmission, etc., a pinion 7 that meshes with the rack 3, and a drive wheel rotation mechanism 6 for rotationally driving the drive wheel 5. A pinion rotation mechanism 8 consisting of a hydraulic motor and the like is mounted, and a hydraulic control box 10 is connected to the drive wheel rotation mechanism 6 and pinion rotation mechanism 8 via a flexible hydraulic hose 9. .

On the other hand, holes a, b, c, and d are drilled through the interior wall 1 at the four corners of the portion scheduled for removal using a core drill or the like. In FIG. 1, first, in order to cut the upper end, the horizontal cut portions a to b,
Cutting cable B threads between hole a and hole b.
is wrapped around parts a to b of the premises wall 1 to be cut, and guide pulleys 11A, 11B, 11C, 11D and guides having rotation surfaces of various angles are temporarily installed on the road surface, the premises wall 1, etc. with anchors etc. The guide pulleys 11P, 11Q, 11R, and 11S (the stand that rotatably supports each guide pulley is not shown) are bent and hung on the drive wheel 5 in an endless manner. In that case, the part to be cut a
The reciprocating line of the cutting cable B wound around ~b is guided through the hole a by guide pulleys 11A and 11S.
and from the hole b, are guided horizontally along the wall surface of the premises wall 1 so as to converge at appropriate intervals, and are guided in a direction approximately perpendicular to the wall surface by guide pulleys 11B and 11R, and guide pulleys 11C and 11
Q, it is guided to the upper part near the extension line of the crack 3, further guided in a substantially vertical direction by guide pulleys 11D and 11P, and finally hung on the drive wheel 5 in a substantially horizontal direction.

[Structure of the cutting cable] As illustrated in FIG. 2, which is an enlarged cross-sectional view, the cutting cable B is made of a steel wire 12 with a diameter of 5 mm and an outer diameter 10 having a diamond grain surface layer.
Cylindrical beads 13 with a length of 10 mm and a length of 10 mm are loosely fitted at a pitch of 20 to 30 mm, and each adjacent cylindrical beads 1
A coil spring 14 is similarly loosely fitted between 3 and 13, and can be bent to a minimum diameter of 10 mm.

Note that the beads 13 may be made of ultra-hard material that can cut concrete layers containing reinforcing bars, concrete blocks, bricks, etc., and may be made of ceramics other than diamond. Further, the steel wire 12 may be provided with a clip (not shown) for each block consisting of an appropriate number of repeating beads 13 and coil springs 14 to restrict free movement between the blocks. good. Further, the coil spring 14 is useful as a bendable spacer, but in some cases, it may be replaced with a cylindrical sleeve as long as it does not impede the flexibility of the steel wire 12, and only the beads 13 can be replaced with a steel wire. 12 so as to be replaceable at a required pitch.

[Effect of cutting method using cutting cable]

In the above configuration, the cutting cable B wound around the portions a to b to be cut is rotated by driving the drive wheel 5 by the operation of the drive wheel rotation mechanism 6.
The guide pulley 11A is caused to circulate in the direction of the guide pulley 11S via the drive wheel 5 at a speed of, for example, 15 to 40 m/sec, and at the same time, the pinion 7 is rotated by the operation of the pinion rotation mechanism 8, and The accompanying movement of the self-propelled platform 4 along the rack 3 constantly urges the rear, for example 50 to 200.
When pulled backward with a tension of Kg, the parts a to b of the premises wall 1 to be cut are completely cut from the front surface to the back surface, including the internal reinforcing bars.

Next, the lower end, the part to be cut in the horizontal direction c~
d, left end, vertical direction cutting planned portions a to c, and right end, vertical direction cutting planned portions b to d, the cutting cable B is similarly connected via a plurality of guide pulleys having rotating surfaces at various angles. The premises wall 1
It can be cut by being movably disposed between the drive wheel 5 and the drive wheel 5. In addition, if necessary, cut more finely vertically and horizontally between the portions a to c to be cut and the portions b to d to be cut, and between the portions to be cut a to b and the portions to be cut c to d. It can be divided into blocks of the required size suitable for the removal work.

FIG. 3 is a perspective view illustrating another example of the method of cutting the premises wall using the cutting cable used in the present invention. , the cutting cable B is wound around the parts a to c of the premises wall 1 to be cut so as to weave between holes a and holes c, and a guide pulley temporarily installed on the road surface or the premises wall 1 with an anchor etc. 11E, 11F and guide pulleys 11T, 11U
(A stand that rotatably supports each guide pulley is not shown in the drawings.) The guide pulley is bent and hung endlessly on the drive wheel 5 via the following.

Note that the cutting order for the part of the premises wall 1 to be removed is not limited to the above, and is determined by taking into consideration the scale of the part to be removed, workability, etc. Furthermore, the method of wrapping the cutting cable B around the part to be cut is not limited to the above-mentioned method of passing the cutting cable B through holes a, b, c, d, etc. If there is a cutting cable B, the cutting cable B may be wrapped around the side of the cutting cable.

In the above cutting and dismantling work, normally,
It is necessary to constantly inject water into the cutting area for cooling, lubrication, cleaning, etc.

As described above, in the method of moving the self-propelled platform 4 along the rack 3, even if the self-propelled platform 4 is moved out of control or cut off immediately after cutting and dismantling the premises wall 1 or when the cutting cable B suddenly breaks, etc. It is safe because there is no danger of the cable B jumping around.

In the above, the rotation surface of the drive wheel 5 is adjusted to be approximately horizontal, but the drive wheel 5 is adjusted to adjust the rotation angle around the axis of the rack 3 with respect to the supports 2, 2a, and to adjust the respective heights of the supports 2, 2a. By adjusting the height, it can be freely adjusted to the desired height and in the desired direction. For example, if the rack 3 is rotated 90 degrees in either direction around the axis from the state shown in FIG. 2 is adjusted to a position higher than the support 2a, the rotating surface of the drive wheel 5 is inclined upward in the direction of the support 2.

In addition, by arranging one or more pulleys at a required angle between the premises wall 1 and the drive wheel 5,
The winding angle of the cutting cable B around the drive wheel 5 can be adjusted, the cutting cable B can be freely bent and arranged at any length, and the cutting cable B can be placed at a desired position on the premises wall 1. It becomes possible to freely wrap it around the vehicle, and also to freely select the relative arrangement between the premises wall 1 and the drive wheel 5.

A cutting cable B is installed between the premises wall 1 and the drive wheel 5.
After the hydraulic control box 10 is installed so that it can travel, the cutting operator can remotely operate the hydraulic control box 10 at a location away from the cutting site or in a safe location, and in some cases, unattended operation for long periods of time is also possible. It is possible.

Example 1 Figure 4 is a schematic cross-sectional diagram of the subway premises, and Figure 5 is a schematic cross-sectional diagram of the - line.
5, 15, substantially vertical interior walls 1, 1 on both sides and a substantially horizontal upper floor plate 16 on the upper part are constructed to form a dome, and the upper floor plate 16 has pillars 17, 17 at appropriate intervals in the center. It is reinforced and supported by ..., and a platform 1 is installed at the end of the premises walls 1, 1.
8 and 18 are attached, and their platform 1
External walls 19, 19 are constructed on the outside of the bases 8, 18, and furthermore, a stratum 20 consisting of a roadbed, roadbed, earth and sand, etc. is laminated on the entire outer periphery of the walls 8, 18.

FIG. 6 is a schematic cross-sectional view illustrating a method for cutting and removing an internal wall according to the present invention, and the present invention will be described below based on the above drawing with respect to only one internal wall.

In the figure, a stratum 20 outside the premises wall 1 is excavated, and a passage space 21 is bored there. The passage space 21 becomes a work area for cutting and removing the premises wall 1, a place for installing cable drive devices and other equipment, and finally a place for installing a new platform in the case of extension and expansion work of the platform.

Next, the cutting cable B is wound around the part of the premises wall 1 to be cut, and the cutting cable B is then driven to travel by the cable drive device A while adjusting the traveling speed and tension, and the premises wall 1 is cut. Dismantle. The configuration of the cable drive device A and the cutting cable B and the method of cutting the premises wall 1 are as described above.

After cutting the premises wall 1 with the cutting cable B, the cutting block is pulled into the passage space 21 while being suspended by a rail-type winch temporarily installed above, or it is pulled into the passage space 21 using a hydraulic jack or the like.
1 and carry it out along the passage space 21. Also, after drawing the cutting block that has been cut into a relatively large size into the passage space 21,
In the passage space 21, the material can be cut into pieces of a size that can be transported out using a cutting cable or by using a conventional cutting machine or crushing machine.
When cutting the premises wall 1 into a single block using the cutting cable B and removing it, cutting it so that the cut surface tapers in the direction of the track 15, which is the opposite direction of the lead-in, will prevent the lead-in to the passage space 21 side. It's easy.

In the above case, cable drive A is connected to line 15
It can be installed either on the side or on the passage space 21 side, and when it is installed on the track 15 side, it is also possible to use an existing vehicle track as a running path. However, in order to eliminate the work on the track 15 side for safety and to prevent the cut and crushed debris from falling to the track 15 side, it is necessary to move it to the passage space 21.
It is preferable to install it on the side, especially in the passage space 21. In addition, as mentioned above, the cutting cable B can be freely bent at any length by passing through a plurality of guide pulleys, so the cable drive device A can be It is also possible to install it on the platform 18 or on the ground.

Furthermore, even if the cable drive device A is placed on the passageway space 21 side, the protective wall 22 is placed on the track side of the premises wall 1 in order to take all possible measures to prevent cut and crushed debris from falling or scattering on the track 15 side. It is preferable to temporarily install it in various ways, for example, on the road surface, the premises wall 1, etc. using an anchor or the like.

Embodiment 2 FIGS. 7 and 8 are cross-sectional schematic diagrams illustrating a method for extending and expanding a subway platform. In this case, as shown in FIG. 7, after the passage space 21 is bored, a new outer wall 23 for the new platform is attached to the existing outer walls 19, 19 outside of the passage space 21.
However, it is preferable to do this before the cutting work of the premises wall 1 from the viewpoint of the work process, and the cutting block after cutting is carried out using a rail type winch or a rail type winch as described above. It is also preferable because the new outer wall 23 can be used as a support for a rail type winch, hydraulic jack, etc. when the new outer wall 23 is pulled into the passage space 21 side by a hydraulic jack or the like.

The construction of the new outer wall 23 may be carried out, if necessary, by a method of cutting and removing the internal wall 1 other than the above-mentioned method of extending and expanding the subway platform.

After cutting and removing the required portions of the premises wall 1 as described above, the new platform 24 is extended onto the existing platform 18 as illustrated in FIG.

〔Effect of the invention〕

As described above, in the method for cutting and removing subway premises walls according to the present invention, a cutting cable made of ultra-hard beads is wound around the part of the premises wall to be cut and is driven, so that the inside walls can be cut and removed. Regardless of the cutting cross-sectional area or thickness of reinforcing bars, the cutting speed is extremely fast, accurate, workable and safe, and the impact on the external environment such as vibration, noise, and dust is extremely low. It can be cut and removed in a small state.

In addition, in the above, by installing the cable drive device on the aisle space side, the premises wall can be cut and removed without requiring work from the track side, so the cutting and removal work is extremely safe. Shredded debris will not fall or scatter on the railroad tracks.

Furthermore, according to this cutting and removal method, the necessary cutting gap corresponding to the diameter of the cutting cable can be obtained, so it is not necessary to drill an opening in the upper part of the premises wall in order to remove or pull in the cutting block from the premises wall. I don't.

Furthermore, according to this cutting and removal method, the premises wall can be cut and removed to the designed dimensions without overcutting as would be the case with a blade-type cutting machine.

Therefore, the subway platform extension/expansion construction method according to the present invention, which mainly involves the above-mentioned cutting/removal method of the premises walls, also produces similar effects and can promptly respond to the recent increase in demand for subway platform extension/expansion construction. This also contributes to significantly shortening the construction period.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating an example of a method for cutting a premises wall using a cutting cable used in the present invention;
Figure 2 is an enlarged cross-sectional view of an example of a cutting cable;
FIG. 3 is a perspective view illustrating another example of a method of cutting a premises wall using a cutting cable used in the present invention;
FIG. 4 is a schematic cross-sectional view of the subway premises, FIG. 5 is a schematic cross-sectional view along the - line, FIG. Figure 8 is a cross-sectional schematic diagram illustrating a method for extending and expanding a subway platform. <Explanation of main symbols> 1...Premises wall, 5...Drive wheel, 11A-F, 11P-U...Guide pulley, 12...Steel wire, 13...Beads,
14...Coil spring, 15...Railway, 18
...Platform, 21...Aisle space, 22...
...Protective wall, 23... New outer wall, 24... New platform, A... Cable drive device, B... Cutting cable, a, b, c, d... Hole.

Claims (1)

[Claims] 1. (a) A step of drilling a passage space on the outside of a precinct wall built along a subway track; (b) A process of attaching ultra-hard beads to a wire as appropriate at the portion of the precinct wall to be cut. (c) a step of winding the cutting cable attached at pitches; and (c) a step of driving the cutting cable to run while controlling the running speed and tension using a cable drive device, and cutting and dismantling the premises walls. Method for cutting and removing walls within the premises. 2 The cable drive device is installed on the aisle space side,
A method for cutting and removing walls within a subway premises according to claim 1. 3. Claim 1, in which a hole for passing the cutting cable is bored at the end of the part of the premises wall to be cut.
The method of cutting and removing walls within subway premises as described in Section 1. 4. The method for cutting and removing a subway premises wall according to claim 1, wherein a protective wall is temporarily installed on the track side of the premises wall. 5. The method for cutting and removing walls within a subway premises as set forth in claim 1, which uses a cutting cable formed by alternately loosely fitting ultra-hard beads and coil springs into a steel wire. 6. The method for cutting and removing a wall in a subway premises according to claim 1 or 5, wherein the ultra-hard beads have a surface layer of diamond grains. 7 (a) The process of drilling a passageway space outside the premises wall constructed along the subway tracks, (b) The process of constructing a new outer wall outside the passageway space, (c) The process of drilling the passage space on the outside of the premises wall constructed along the subway tracks, (c) , the step of wrapping a cutting cable made by attaching ultra-hard beads at appropriate pitches around the wire; (d)
A method for extending and expanding a subway platform, which comprises the steps of: driving a cutting cable while adjusting its running speed and tension using a cable drive device; cutting and dismantling the walls of the premises; and (e) extending a new platform. 8 The cable drive device is installed on the aisle space side,
A method for extending and expanding a subway platform according to claim 7. 9 Claim 7, in which a hole for passing the cutting cable is bored at the end of the part of the premises wall to be cut.
The method for extending and expanding the subway platform described in Section 1. 10. The method for extending and expanding a subway platform according to claim 7, wherein a protective wall is temporarily installed on the track side of the subway premises wall. 11. The method for extending and expanding a subway platform according to claim 7, which uses a cutting cable formed by loosely fitting ultra-hard beads and coil springs into a steel wire alternately. 12. The method for extending and expanding a subway platform according to claim 7 or 11, wherein the ultra-hard beads have a surface layer of diamond grains.