JPH0680280B2 - Subway platform extension construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subway platform extension / expansion method for cutting and removing a reinforced concrete interior wall (hereinafter simply referred to as a "premise wall") in a subway premises to extend and expand the platform.

[0002]

2. Description of the Related Art Due to the increase in the number of subway users in recent years, the number of subway lines has increased due to the increase in transportation volume, but there are some places where it has reached its limit. There is an increasing need to connect more vehicles than the number of conventional subway connected vehicles in order to take measures to get in.

However, in the case of the subway, unlike the case of the conventional ground railway, it cannot be solved by simply extending the platform, and the conventional construction work for removing the inner wall of the tunnel portion is required. As a construction method for dismantling and removing the inner wall constructed along such a subway line, conventionally, the outside of the inner wall is excavated to form a passage space, and then the inner wall is moved to the passage space side. Or, if necessary, a method of crushing or cutting with a vibration type crusher or a blade type cutting machine that rotates a disk-shaped diamond blade from both sides on the side of the track to dismantle and then removing this is adopted. The platform is extended after removing the inner wall.

[0004]

However, the vibrating crusher used in the above-mentioned conventional construction method has a great influence on the external environment due to its violent vibration noise, and the crushing work time and working conditions are severely limited. Moreover, there is a problem that the reinforcing bars arranged in the inner wall of the yard become a great obstacle to the crushing work, which causes the crushing speed to be slow.

On the other hand, although the blade type cutting machine is suitable for cutting rebar, it is small in size and the horsepower of the motor is limited due to the convenience of blade manufacturing and handling. Is inferior in cutting ability and cutting speed is extremely slow. Also, the cutting area is limited to a narrow range, and the thickness that can be cut is 300 to 400 m.
m is the maximum. Therefore, for example, not only is it impossible to completely cut an internal wall with a thickness of 700 mm or more from only one side, but even when cutting from both sides, even if the internal reinforcing bars can be cut, In many cases, the rotary blade does not reach even the part, and the non-cutting point needs to be crushed by another crusher. Further, in the case of using a blade type cutting machine, it is necessary to replace the blades one after another during a series of cutting work, and this replacement operation interrupts the cutting work and reduces workability.

Further, in the case of cutting by the rotation of such a disk-shaped blade, there is a problem that an overcut is inevitably required even at a portion where cutting is not necessary due to the cutting mode.

Further, when using a blade-type cutting machine, scaffolding is installed on the wall surface of the premises, and a guide rail for driving the blade-type cutting machine, which is a small but heavy object, is attached and cut. Since the worker needs to operate the blade type cutting machine in the state of being close to the wall surface, there is a big problem in safety and workability. In addition, when removing the cutting block after cutting with a blade type cutting machine from the inner wall, the cutting gap is narrow because the blade thickness is small, and if it is left as it is, the cutting block is suspended in the passage space while being suspended by a rail winch or the like. Since it is difficult to pull it in, it was necessary to laterally crush the upper part of the inner wall to an appropriate width and open it.

Further, due to the cutting ability and cutting mode of the blade type cutting machine as described above, the work of cutting and dismantling may be required not only from the passage space side but also from the track side. , The work time on the track side is limited due to the passage of vehicles on the track, workers on the track side are always at risk due to miscommunication of the vehicle travel time, etc. Since it scatters and falls on the track side, especially on the track, it is not only dangerous for vehicle operation, but the work of removing and carrying out these crushed debris may be accompanied by the same danger as the above-mentioned track side cutting work. is there.

Therefore, the object of the present invention is not limited to the cutting sectional area and the cutting thickness of the inner wall of the subway premises including the internal reinforcing bars, and the workability is accurately and extremely fast. Well, safely and in a state where the influence on the external environment such as vibration, noise and dust is extremely small,
An object of the present invention is to provide a construction method capable of easily extending and expanding the platform by cutting and removing it without requiring work from the track side.

[0010]

In order to solve the above problems, the present invention provides (a) a step of forming a passage space on the outside of a premises wall constructed along a subway line, and (b) an outside of the passage space. A step of constructing a new outer wall in (c), a step of installing a guide pulley of the cable drive device in the formed passage space, and a step of installing the main body of the cable drive device on the existing platform or on the ground, (d) cutting of the internal wall A process of winding a cutting cable in which super-hard beads are attached to the wire at an appropriate pitch around a predetermined portion, (e) The cutting cable is driven and driven by a cable drive device while the traveling speed and tension are adjusted, and the premises For each step of cutting and dismantling the wall, (f) installing a removal facility for removing the internal wall after cutting and dismantling in the passage space inside the new outer wall, and (g) extending the new platform Ri is obtained by configuring the stretch expansion method of the subway platform.

[0011]

In the above, the cable drive device for driving the cutting cable is provided with, for example, a motor such as a hydraulic motor or an electric motor, and a drive wheel driven to rotate by the motor, and the cutting cable is attached to the drive wheel. It is hung and driven to run, and pressed against the planned cutting part of the inner wall.

As in the case of rope transmission or belt transmission, the arrangement of the cutting cable between the drive wheel and the premises wall, the change of the traveling direction of the cutting cable, etc. are adjusted by adjusting the angle of the rotating surface of the drive wheel. Or by temporarily installing guide pulleys at each bending point. Further, the running cutting cable is biased in a required direction so as to be constantly held at a required tension, and the tension is maintained or adjusted along with the progress of cutting and disassembling, for example, the drive wheel together with its accessories and the like. , It can be performed by gradually moving to the rear.

Further, by installing the above-mentioned cable drive device in the passage space side, only the cutting cable wound around the portion to be cut and traveling is exposed on the line side, and the line side at the time of cutting is cut. No work is required.

So-called wire saws have been conventionally known, but they have been used for cutting out stone materials in a quarry, and the present inventor has used them to extend a subway platform completely different in the industrial field. The present invention has been found to have an epoch-making effect by being used for the extension construction method, and the present invention has been completed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view for explaining an example of a method of cutting a premises wall with a cutting cable for cutting a premises wall by a cutting cable used in the present invention.
In the above, on the road surface in front of the premises wall 1, two supports 2 and 2a whose height can be adjusted are temporarily installed in an immovable state by anchors or the like (not shown), and the supports 2 and 2a are provided with gears. A column-shaped rack 3 with a shaft is fixedly mounted on the rack 3 so that the rotation angle around the axis can be adjusted, and a self-propelled table 4 is fitted in the rack 3 so as to be movable in the axial direction. .

On the self-propelled table 4, a drive wheel 5, a hydraulic motor for rotating the drive wheel, a drive wheel rotating mechanism 6 including a continuously variable transmission, a pinion 7 meshing with the rack 3 and the like. A pinion rotating mechanism 8 including hydraulic pressure for rotational driving is mounted, and a hydraulic control box 10 is connected to the drive wheel rotating mechanism 6 and the pinion rotating mechanism 8 via a flexible hydraulic hose 9. ing.

On the other hand, on the inner wall 1, holes a, b, c and d are bored at the four corners of the portion to be removed so as to be penetrated by a core drill or the like. In FIG. 1, first, a cutting cable B is sewn between the holes a and b in order to cut the upper part, which is the horizontal cutting part a to b, from the planned cutting part a of the internal wall 1. Guide pulleys 11A, 11B, 11C, 11D and guide pulleys 11P, 11Q, 11R, 11S (each of which has a rotating surface of various angles temporarily wound around the road surface or the premises wall 1 etc. by anchors or the like while being wound around b) A stand for rotatably supporting the guide pulley is omitted) to form a cable guide portion of the cable drive device, which is endlessly hung on the drive wheel 5 while being bent through these guide pulleys in order. In that case, the reciprocal line of the cutting cable B wound around the planned cutting portions a to b is horizontally and appropriately spaced from the holes a and b along the wall surface of the premises wall 1 by the guide pulleys 11A and 11S. Guided to focus, guide pulleys 11B and 11R
Is guided in a direction substantially perpendicular to the wall surface by the guide pulleys 11C and 11Q, and is guided to the upper part near the extension of the rack 3 by the guide pulleys 11C and 11Q.
Is guided in a substantially vertical direction and finally hung on the drive wheel 5 in a substantially horizontal direction.

As shown in FIG. 2, which is an enlarged cross-sectional view of the cutting cable B, the cutting cable B has an outer shape of 10 m including a steel wire 12 having a diameter of 5 mm and a diamond grain surface layer.
m, cylindrical beads 13 having a length of 10 mm are 20 to 30 mm
Cylindrical beads 13, which are loosely fitted in the pitch and are adjacent to each other,
Similarly, a coil spring 14 is loosely fitted between 13 and can be bent with a minimum diameter of 100 mm.

The beads 13 need only be ultra-hard ones capable of cutting concrete blocks containing bricks, bricks, etc., and ceramics other than diamond may be used. Also, steel wire 1
2 has an appropriate number of beads 13 and a coil spring 14
A clip (not shown) for restricting free movement between the blocks may be attached to each block formed by repeating the above. Further, although the coil spring 14 is useful as a bendable spacer, in some cases, it may be replaced with a cylindrical sleeve as long as it does not impair the bendability of the steel wire 12, and only the beads 13 are attached to the steel wire 12. It may be exchangeably fixed at a required pitch.

In the above structure, the cutting cable B wound around the portions to be cut a to b is driven by the drive wheel rotating mechanism 6 to rotate the drive wheel 5, and is guided from the guide pulley 11A to the drive wheel 5. Guide pulley 11S
In the direction of, for example, 15 to 40 m / sec so as to circulate, and at the same time, the pinion rotation mechanism 8
The pinion 7 is rotationally driven by the operation of and the movement of the self-propelled table 4 along the rack 3 is always biased rearward,
For example, when pulled backward with a tension of 50 to 200 Kg, the planned cutting portions a to b of the internal wall 1 are completely cut from the front surface to the back surface including the internal reinforcing bars.

Subsequently, a lower end, a horizontal cutting portion c
To d, the left end, the planned vertical cutting portions a to c, and the right end, the vertical planned cutting portions b to d, are similarly cut through a plurality of guide pulleys having rotating surfaces of various angles. The cable B can be cut by arranging it so that it can travel between the premises wall 1 and the drive wheels 5.
In addition, if necessary, the parts to be cut a to c and the parts to be cut b to d, and the parts to be cut a to b and the parts to be cut c to d are further finely cut vertically and horizontally, and after cutting, Can be subdivided into blocks of the required size suitable for removal work.

FIG. 3 is a perspective view for explaining another example of the method of cutting the inner wall with the cutting cable used in the present invention. In FIG. 3, the vertical cut portions a to c are cut. In order to sew between the holes a and c,
The cutting cable B is wound around the planned cutting portions a to c of the premises wall 1, and on the way, guide pulleys 11E and 11F and guide pulleys 11T and 11U (each guide pulley) that are temporarily installed on the road surface or the premises wall 1 by anchors or the like. Is rotatably supported (not shown), and is hung on the drive wheel 5 in an endless manner while being sequentially bent.

The cutting order of the planned removal portion of the internal wall 1 is not limited to the above, and is determined in consideration of the scale and workability of the removal planned portion. The method of winding the cutting cable B around the planned cutting portion is not limited to the above method of passing the cutting cable B through the holes a, b, c, d, etc., and the side of the planned cutting portion is exposed. In this case, the cutting cable B may be wound so as to come into contact with the side edge thereof.

In the above-mentioned cutting and disassembling work, it is usually necessary to constantly supply water to the cutting site for cooling, lubrication, cleaning and the like.

As described above, in the method of moving the self-propelled table 4 along the rack 3, the self-propelled table 4 runs away immediately after the dismantling of the internal wall 1 or when the cutting cable B is suddenly broken. It is safe because there is no risk of the cutting cable B jumping or bouncing.

Although the rotation surface of the drive wheel 5 is adjusted to be substantially horizontal in the above description, the drive wheel 5 adjusts the rotation angle around the axis of the rack 3 with respect to the supports 2 and 2a and the supports 2 and 2a. By adjusting the respective heights, it is possible to freely adjust the heights to desired heights and directions.
For example, from the state shown in FIG.
When the support wheels 2 and 2a are rotated 90 degrees in either direction and fixed to the supports 2 and 2a, the rotation surface of the drive wheels 5 becomes vertical, and when the support 2 is adjusted to a position higher than the support 2a in FIG. The rotating surface is inclined in the upward direction in the direction of the support 2.

By disposing one or a plurality of pulleys between the inner wall 1 and the drive wheels at a required angle, the winding angle of the cable B for cutting with respect to the drive wheels 5 can be adjusted and the pulley for cutting can be adjusted. The cable B is freely bent and arranged at a desired length, the cutting cable B is freely wound around a desired position on the premises wall 1, and the relative distance between the premises wall 1 and the drive wheels 5 is increased. It is possible to freely select the physical arrangement relationship.

Then, as shown in FIG. 1, this pulley is installed so as to rotate parallel to the inner wall of the premises, and a similar pulley is also installed in the drive unit so that the traveling planes of the two cutting cables are installed in the premises. It may be parallel to the wall. In that case, the traveling space of the cutting cable can be made extremely small, and the cable drive device can be installed in a narrow passage space.

After the cutting cable B is movably disposed between the premises wall 1 and the drive wheel 5, the cutting operator installs the hydraulic control box 10 at a place away from the cutting place or at a safe place. It can be operated remotely and, in some cases, unmanned operation for a long time is possible.

The cable drive device can be driven and run by a known chain as well as by the pinion meshing with the rack.

FIG. 4 is a schematic cross-sectional view of the subway premises, and FIG. 5 is a schematic cross-sectional view of the line I-I, showing round-trip lines 15 and 15.
Along the both sides, substantially vertical inner walls 1, 1 and a substantially horizontal upper floor plate 16 are constructed so as to form a dome on the upper side, and the upper floor plate 16 has columns 17, 1 at appropriate intervals in the center.
7 ... Reinforced and supported, platforms 18 and 18 are attached to the ends of the premises walls 1 and 1, outer walls 19 and 19 are constructed on the outsides of the platforms 18 and 18, and the entire outer peripheries thereof are further provided. A stratum 20 composed of a roadbed, a roadbed, and earth and sand is laminated.

FIG. 6 is a schematic cross-sectional view illustrating a method of cutting and removing an inner wall according to the present invention. Below, the present invention will be described with reference to the above drawings only on one side of the inner wall.

In the figure, a stratum 20 outside the inner wall 1
Is excavated and a passage space 21 is bored therein. The passage space 21 serves as a work place for cutting and removing the inner wall 1, and also serves as a place for installing a cable drive device and the like.
Furthermore, in the case of extension / expansion work for the platform, it will eventually become the installation site for the new platform.

After the passage space 21 is formed, the passage space 21
A new outer wall 23 for a new platform is constructed outside the existing wall to extend over the existing outer walls 19, 19.

Next, a cutting cable B is wound around a portion of the inner wall 1 to be cut, and the cutting cable B is driven to run while the traveling speed and tension are adjusted by a cable driving device, and the inner wall 1 is cut. Dismantle. The configurations of the cable driving device and the cutting cable B and the method of cutting the inner wall 1 are as described above.

The cutting block after cutting the inner wall 1 with the cutting cable B is drawn into the passage space 21 while being suspended by, for example, a rail winch temporarily installed above the inside of the new outer wall 23, or a hydraulic jack. It may be drawn into the passage space 21 by means such as the like and carried out to the outside along the passage space 21. In addition, after a relatively large cutting block is drawn into the passage space 21, the cutting block B can similarly be carried out in the passage space 21 or can be carried out using a conventional cutting machine or crusher. It is also possible to divide it into small pieces and remove it with a winch or the like running on a rail installed in the inner space of the new outer wall 23. Cut the premises wall 1 into a single block with the cutting cable B,
When removing, track 1 whose cut surface is in the opposite pull-in direction
When it is cut so as to taper in the direction of 5, the passage space 2
It is easy to pull in to the 1 side.

As described above, the cutting cable B can be flexibly arranged at a desired length by interposing a plurality of guide pulleys. Therefore, the cable driving device main body A may be installed as needed. It is also possible to install it on the platform 18 or on the ground.

Further, in order to prevent the cutting and crushing debris from falling and scattering to the side of the track 15, it is necessary to provide the protective wall 22 on the track side of the premises wall 1 in various ways, for example, the road surface or the premises wall 1 etc. It is preferable to temporarily install it with an anchor or the like.

FIG. 6 and FIG. 7 are schematic cross-sectional views illustrating the extension and extension method of the subway platform. As described above, after the passage space 21 is drilled, a new outer wall 23 for a new platform is constructed to extend to the existing outer walls 19 and 19 outside the passage space 21. It is preferable from the work process that the cutting is performed before the cutting of the wall 1, and when the cutting block after cutting is pulled into the passage space 21 side by the rail winch or hydraulic jack as described above, the new outer wall 23 can be used as a support for those rail winches, hydraulic jacks and the like, and such removal equipment can be installed after the new outer wall 23 is formed and prior to the cutting operation.

After the required portion of the premises wall 1 is cut and removed as described above, the new platform 24 is extended to the existing platform 18 as illustrated in FIG.

[0041]

As described above, in the extension construction method for the subway platform according to the present invention, the cutting cable formed by attaching the super-hard beads is wound around the planned cutting portion of the premises wall to drive it. The internal walls, including internal reinforcing bars, are not limited by the cutting cross-sectional area or cutting thickness,
It can be cut and removed accurately at an extremely high cutting speed, with good workability and safety, and in a state where the influence on the external environment such as vibration, noise and dust is extremely small.

Therefore, this is the most appropriate construction method that satisfies the quietness required for underground construction of underground subways such as underground of existing buildings, and is extremely narrow and has poor ventilation. It is the most suitable construction method, and the construction of the subway yard requires the construction of a long and narrow space so that it cannot be seen in other constructions. It can be cut by cutting work, and is therefore the most suitable construction method for subway premises construction. In addition, the subway premises are often close to the basement or foundation of the adjacent building, or various cables and water and sewer pipes, and it is often required to perform work within the minimum required width. However, in the construction method of the present invention, it is only necessary to secure at least the guide pulley installation space of the cable drive device and the installation work space thereof, which is also the most suitable as the subway platform extension construction method.

Further, by having the step of installing the cable drive device in the perforated passage space, the perforated passage space becomes a working space for cutting work, dismantling work, and the like, and further, after cutting and dismantling the premises. It can be used for a variety of purposes as a removal equipment installation space for removing walls, and a long and narrow indoor wall, which is the object to be cut, has a cable drive installed in a long and narrow passage space along the wall surface. Since the cables can be run in parallel and cut, there is a restriction on the formation of the passage space, and it is possible to easily cut even a narrow space.

Further, in the above, by installing the cable drive device on the passage space side, the internal wall can be cut and removed without requiring work from the track side, so the cutting and removing work is extremely safe. Also, the cutting and crushing waste does not fall and scatter on the track side.

Further, according to this construction method, since a required cutting gap corresponding to the diameter of the cutting cable can be obtained, in order to remove or pull in the cutting block from the inner wall,
It is not necessary to make an opening in the upper part of the premises wall.

Furthermore, according to this construction method, it is possible to cut and remove the inner wall with a size as designed without causing an overcut as in the case of a blade type cutting machine.

Therefore, the method of extension / expansion of a subway platform according to the present invention can immediately meet the increasing demand for extension / expansion work of a subway platform and can contribute to a drastic reduction of the construction period.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an example of a method of cutting a premises wall with a cutting cable used in the present invention.

FIG. 2 is an enlarged cross-sectional view of an example of a cutting cable.

FIG. 3 is a perspective view for explaining another example of the method of cutting the inner wall with the cutting cable used in the present invention.

FIG. 4 is a schematic cross-sectional view of a subway premises.

5 is a schematic cross-sectional view taken along the line I-I of FIG. 4 is a schematic cross-sectional view of the subway premises.

FIG. 6 is a schematic cross-sectional view illustrating the extension extension method for a subway platform.

FIG. 7 is a schematic cross-sectional view illustrating the extension extension method for a subway platform.

[Explanation of symbols]

 1 Inner Wall 5 Drive Wheel 11A-F Guide Pulley 11P-U Guide Pulley 12 Steel Wire 13 Bead 14 Coil Spring 15 Track 18 Platform 21 Passage Space 22 Protective Wall 23 New Outer Wall A Cable Drive Unit B Cutting Cable a, b, c, d holes

Claims (1)

[Claims] 1. A method of: (a) forming a passage space outside a premises wall constructed along a subway line; (b) a step of constructing a new outer wall outside the passage space; and (c) being formed. A step of installing a cable drive device in the passage space, (d) a step of winding a cutting cable formed by attaching super-hard beads to the wire at an appropriate pitch on a planned cutting portion of the inner wall,
(E) A step of driving and driving the cutting cable under the control of traveling speed and tension by a cable driving device and cutting and dismantling the inner wall, (f) Removing the inner wall after cutting and dismantling into the passage space inside the new outer wall The process of installing the removal equipment,
(G) a process for extending a new platform, and a subway platform extension / expansion method characterized by the following steps: