JP2003293695A - Method for repairing tunnel lining inner surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for repairing and reinforcing a tunnel capable of eliminating the need for removing wiring and allowing a short time operation. <P>SOLUTION: Divided arch members 18a are detachably connected to each other at specified intervals in the axial direction of the tunnel to form an arch member 18. At the time of the assembly thereof, a cable 2 on the tunnel lining inner surface is assembled in an arch shape while moving onto the arch members 18a. In this case, the tip sides of spacer bolts 24 passed through the arch member 18 from the inside to the outside are put on the inner surface of the tunnel to stably support the arch member 18. The spacer bolts 24 are tightened toward the inner surface of the tunnel to provide reactions to the spacer bolts 24 so as to reduce the diameter of the arch member 18. Then plate-like reinforcement members 11 are installed in order in a space 25 on the rear side of the cable 2, and the arch member 18 is dismounted after the cable 2 is moved from the arch member 18 to the reinforcement member 11. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing an inner surface of a lining of a railway tunnel or the like, and more particularly to a method of repairing an inner surface of a tunnel lining for preventing concrete falling from a deteriorated existing concrete lining. Is.

[0002]

2. Description of the Related Art In recent years, there has been a collapse accident of lining concrete in railway tunnels and road tunnels.
Various types of reinforcement and repair methods have been proposed and implemented in which the inner surface of an existing tunnel lining is reinforced with a center, a patch plate, sheet attachment, wire mesh / net attachment, liner plate reinforcement, etc.

On the other hand, in the case of a railway tunnel, a trolley wire for supplying power to the train, a feeder line, a signal cable for communication between the train and the base station, etc. are installed inside the tunnel without hindering normal business operation. There are many wires that cannot be changed even temporarily.

[0004]

[Problems to be Solved by the Invention] When reinforcing the inner surface of a lining of a tunnel, what is required is to comply with the construction limit (a region that does not hinder train running), to perform quick construction in a short time, and to temporarily reinforce. Even if the work takes several days, it does not hinder the running of the train.

With respect to this point, the conventional typical reinforcement method, which is the reinforcement of the inner surface of the lining and the reinforcement method of the liner plate, greatly violates the inside of the tunnel and cannot be applied when there is no margin for the construction limit. It was Furthermore, the backing plate, sheet pasting and wire mesh / net pasting construction methods have a problem that they cannot withstand the fall of a large concrete block. Furthermore, since the work of removing the wiring is time-consuming, it is difficult to quickly install the reinforcing member, which affects the running of the train.

The present invention provides a tunnel repairing method for solving these problems.

[0007]

In order to solve the above-mentioned problems, the present invention is constructed as follows.

According to a first aspect of the present invention, there is provided a method for repairing an inner surface of a tunnel lining, which is arranged at a predetermined interval in a tunnel axial direction, and which uses a cable temporary arch member composed of a plurality of divided arch members. This is a repair method for the inner surface of the lining, and the wiring of the inner surface of the lining is changed from the existing support metal to a split arch member in parallel with the assembly work, while the split arch members are detachably connected in the tunnel circumferential direction to form an arch. When assembling and assembling the divided arch member into an arch, the arch member penetrates from the inner side of the tunnel toward the inner side of the lining, and the end portions of the spacer bolts provided at required intervals in the circumferential direction of the tunnel are the same as those described above. By stably supporting the arch member by applying it to the inner surface of the tunnel, and then tightening the spacer bolt to project it to the inner surface of the tunnel,
A space is formed on the back side of the arch member by applying a reaction force to the spacer bolt to reduce the diameter of the arch member, and a plate-like reinforcing member is sequentially installed in this space, and the wiring is connected from the arch member. It is characterized in that the arch member is removed after refilling with the reinforcing member, and then the back surface of the reinforcing member is filled with the time-curable material.

According to a second aspect of the present invention, the plurality of divided arch members in the first aspect of the invention are applied to a connecting metal object and detachably joined by a bolt penetrating the abutting surface thereof. The lower end portion is detachably bolted to a beam member that extends in the axial direction in the tunnel, and the arch member is manually placed in the tunnel.

A third invention is characterized in that the cable temporary arch member and the reinforcing member in the first invention are made of any material such as iron, aluminum, concrete and FRP.

[0011]

According to the present invention, when repairing / reinforcing the inner surface of the tunnel, various wires (cables) attached to the existing lining are converted into arch members for temporary cable installation, thereby temporarily supporting the cables on the arch members. The reinforcement member can be installed by doing so, so that it is possible to work without cutting and removing the cable, of course, it is easy to change the layout of the cable,
Moreover, it is possible to work smoothly in a short time without disturbing the commercial operation of the train.

Moreover, the cable temporary arch member is divided into a plurality of pieces, has a narrow plate shape, and has a size that can be manually handled. In other words, since the divided arch members are lighter than several tens of kilograms, they can be constructed manually, can be rapidly constructed by this man-in-the-middle tactics, and can be constructed between train breaks, so business operation is not hindered.

Further, the wiring is changed from the supporting metal of the existing lining to an arch member for temporary cable installation, and a large plate-shaped reinforcing member is installed in the space on the back side of the wiring formed by the diameter reduction of the arch member by a construction machine. Combined with the fact that it can be installed and the arch member can be divided into small parts, it is easy to work while intersecting the wiring, and in this respect also rapid construction is possible and it is possible to construct safely. Become.

Further, according to the present invention, since the cable temporary arch member and the reinforcing member are both plate-shaped, they can be applied even when the construction limit is severe. Furthermore, after the completion of repairs, the entire arch crown of the tunnel is covered with a reinforcement material that is constrained by a time-curable material, so not only the load due to wind pressure and vibrations during train running, but also the dropping of large concrete blocks Can also endure.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a reinforcing member in a state in which an existing wiring (called a cable) in a tunnel is removed from a supporting metal member and temporarily supported by a temporary supporting member (arch member for temporarily installing a cable) newly proposed by the present invention. FIG. 4 is a front cross-sectional view showing the overall outline of the inner surface of the tunnel in a state where the inner surface of the lining is repaired while the wiring is arranged again from the temporary support member to the reinforcing member after the wiring is arranged.

In FIG. 1, the cable temporary arch member 18 is first arranged close to the inner surface of the tunnel, and the arch member 18 completes the arch while supporting the cable 2 separated from the existing support metal on the inner surface of the lining. Next, the diameter of the arch member 18 is reduced so as to be separated from the inner surface of the tunnel to form a space 25 on the back side of the arch member 18, and the reinforcing member 11 is arranged in the space portion 25. The left side from the center of FIG. 1 shows a state in which it is close to the inner surface of the tunnel of the temporary cable installation arch member 18 before the diameter reduction, and the right side from the center shows a state in which a space 25 after the diameter reduction is formed.

In FIG. 1, the existing tunnel 1 has a lining inner surface 8a constructed by placing concrete 8 on the inner surface of the ground 7, and on the floor slab 4 via sleepers 5. Railway rails 6 are installed. Reinforcing member 11 of the present invention
Before the reinforcement by, the lining inner surface 8a of the concrete 8 is exposed in the tunnel. In FIG. 1, the two-dot chain line indicates the construction limit 10, the outside of the two-dot chain line is a region that does not hinder the running of the train, and the reinforcing member 11 does not violate the construction limit 10 so that the lining inner surface 8 a Is arranged in a narrow space 25 between the construction limit 10 and the
The fixed structure is subject to that constraint.

In the present invention, the lining inner surface 8 of the concrete 8 is
By installing a reinforcing member (plate-like protective surface material) 11 on a, it is possible to prevent the concrete 8 from collapsing, and in addition, to reinforce against external forces such as loosening of the natural ground and plastic pressure. is there. The reinforcing member 11 is manufactured by being divided into a tunnel circumferential direction and a tunnel axial direction, which are cut along a plane perpendicular to the tunnel axis and a plane substantially parallel to the tunnel axis. Configured as a thin wall segment.

In FIG. 2, a plurality of reinforcing members 11 are joined so as to be aligned in the circumferential direction of the tunnel and in the axial direction of the tunnel to cover the tunnel ceiling and the tunnel inner surfaces on both upper sides of the tunnel to form a substantially semi-circular shape. The reinforcing member 11 is arranged so as to be formed (the entire reinforcing member 11 is referred to as a reinforcing segment 11a). The material of the reinforcing member 11 may be iron such as steel plate, aluminum, concrete, FRP, or any other material.

As shown in the drawing, the beam member 1 is provided at the lowermost stage (both ends in the tunnel circumferential direction) of the substantially semi-circular reinforcing segment 11a.
It is fixed to 2. The beam member 12 is made of H-shaped steel, box-shaped steel, or the like, is installed at intermediate height positions on both sides of the tunnel, and is installed so as to extend in the tunnel axial direction. It supports the distributed load of the migration protection structure. In the illustrated example, the fixing means of the beam member 12 penetrates the beam member 12 and is arranged at a predetermined interval in the tunnel axial direction.
It is fixed to the inner wall of the tunnel by the anchor bolts 15 that are installed at.

At the time of attaching the reinforcing member 11, a plurality of cables 2 are fixed to the inner surface 8a of the lining by an existing supporting metal (not shown) including bolts on the ceiling of the tunnel. Since the reinforcing member 11 cannot be attached to the inner surface of the lining,
It is necessary to temporarily separate the cable 2 from the inner surface 8a of the lining together with the existing support metal member for work.

In this case, if the cable 2 is temporarily cut at a predetermined location and is removed while the work is being carried out, the installation work of the reinforcing member 11 itself is easy. As a long time work. In reality, it is required to complete the work in a short time without hindering the running of the train, and for this purpose, it is necessary to carry out the repair work while maintaining the connection without removing the cable 2.
However, when working without cutting and removing the cable 2, the cable 2 detached from the inner surface 8a of the lining hangs down in a predetermined length range in the state of no supporting means in a hanging shape. Reinforcement work is often done over several days, but train operation is not possible in this state, so conventionally,
It was considered difficult to install the reinforcing member 11 without removing the cable 2.

In the present invention, the cable temporary arch member 1
This problem is overcome by providing 8. The temporary cable arch member 18 is temporarily installed in the tunnel only during the installation work of the reinforcing member 11 prior to the installation work of the reinforcement member 11, and the cable 2 detached from the lining inner surface 8a is temporarily installed. When the supporting work is completed and the installation work of the reinforcing member 11 is completed, the cable 2 is reattached (changed) from the temporary arch member 18 to the reinforcing member 11.

The construction of the arch member 18 for cable temporary construction is as follows.
As shown in each figure, a band-shaped divided arch member 18a having a predetermined width is detachably connected in a circumferential direction of a tunnel with a connecting metal piece 19 to be formed in an arch shape, and the cable temporary arch member 18 is formed in the tunnel axial direction. At a predetermined interval, that is,
When the cables 2 are supported, they are arranged at intervals such that they do not hang down.

In the cable temporary arch member 18,
A horizontal bent portion 1 is provided below the divided arch members 18a at both ends.
8b is formed, the horizontal bent portion 18b is placed on the upper surface of the box-shaped beam member 12, and the fixing screw 2 is attached to the abutting portion.
Screw 0. The fastening work of the fixing screw 20 may be performed through the work hole 16 provided in the beam member 12 having a box cross section.
In this way, the split arch members 18a at both ends are detachably fixed to the beam 12. Connecting hardware 1 of the split arch member 18a
9, the groove width is substantially the same as the width of the divided arch member 18a and the groove depth is substantially the same as the thickness of the arch member as shown in FIG.
The cross section is provided in a predetermined length and has a U-shaped cross section, for example. Then, the end of each divided arch member 18a is fitted into the groove portion of the connecting metal piece 19, and the tip of the split arch member 18a is substantially abutted at the center of the groove. Screw together. This allows
Both split arch members 18a are separably connected to each other via the connecting metal piece 19.

The arch member 18 for cable temporary installation is divided into a plurality of parts by arranging the arch member 18 around the back side (ground side) of the cable 2 fixed to the inner surface 8a of the lining by the existing support metal. It is because of necessity.
That is, after the divided arch member 18 is installed, the cable 2 separated from the lining inner surface 8a on the back side thereof is moved to the empty side in the tunnel of the arch member 18a by intersecting the tip portions of the divided arch members 18a. On this inner side, the cable 2 is fixed to the arch member 18 by the presser foot 22 and the screw 23.
Temporarily fix to a. After that, the ends of the divided arch members 18a are connected to each other via the connecting metal piece 19 to form an arch (shown in FIG. 3).

A plurality of spacer bolts 24 are provided to penetrate the temporary cable arch member 18 in the thickness direction and at predetermined intervals in the tunnel circumferential direction. Then, both ends of the arch member 18 are supported by the beam member 12, and the tips of the spacer bolts 24 are pressed against the lining inner surface 8a.

The spacer bolt 24 has two functions. The first effect is that the tip of the spacer bolt 24 is pressed against the inner surface 8a of the lining while slightly protruding from the back surface of the arch member 18, so that the arch member 18 can be self-held on the inner surface 8a of the lining without any fluctuation. . The second effect is
To insert the reinforcing member 11 between the inner surface 8 a of the lining and the arch member 18 by turning the spacer bolt 24 in the above state from the inner side of the tunnel and increasing the protruding length from the back surface of the arch member 18. Is to easily and surely form the space 25.

That is, the arch member 18 is shown in FIG.
Left side of FIG. 3 and the state of FIG. 3 (A), at this time, the spacer bolts 24 are slightly tightened, and the tip thereof is pressed against the existing inner surface of the lining (the amount of protrusion may be small),
The arch member 18 is pressed against the inner surface 8a of the lining, and the arch member 18 is stable against a load due to wind pressure or vibration during train running, and can temporarily and temporarily support the cable 2 separated from the inner surface 8a of the lining. .

Next, on the right side of FIG. 1 and FIG. 3 (B),
As shown in (C), the diameter of the arch member 18 can be reduced by rotating the spacer bolt 24 from the inner side of the tunnel and increasing the protruding length of the spacer bolt 24 from the back surface of the arch member 18, and the inner surface of the lining can be reduced. A space 25 is formed between 8a and the arch member 18, and then the reinforcing member 11 is inserted into this space 25.

The work of fixing the reinforcing member 11 to the inner surface 8a of the lining is divided into a plurality of pieces in the circumferential direction of the tunnel and in the axial direction of the tunnel, and one of the reinforcing members 11 has a predetermined size.
The inner surface 8a of the lining using a construction machine (Electa etc.)
It is performed by arranging it at a predetermined position. At this time, the reinforcing members 11 that are joined in the tunnel circumferential direction and the tunnel axial direction are joined by abutting the edges, or by a method of fitting a concavo-convex portion formed at the edges. A plurality of locking pieces 13 stand up from the upper surface of the beam member 12 at intervals.
The lower end side surface of the reinforcing member 11 is engaged with the side surface of the locking piece 13 so as not to be displaced inward.

After the work of sequentially attaching the plurality of reinforcing members 11 is completed, the back surface of the reinforcing member 11 is filled with a time-curable material such as a grout material so as to fill the space with the inner surface 8a of the existing lining and hardened. After that, the cable 2 temporarily supported by the arch member 18 is changed into the reinforcing member 11 in order from the reinforcing member 11 newly fixed to the lining inner surface 8a.
The work is completed by separating and dismantling the arch member 18 in order from the end of the refilling work and carrying out from the tunnel.

In the above tunnel repair work, since the cable temporary arch member 18 is divided into a plurality of pieces and has a narrow plate shape, it is lightweight and can be manually constructed. For this reason, the arch member 18 can be rapidly constructed by human tactics and can be constructed between trains, so that business operation is not hindered.
Further, since the arch member itself can be divided into small pieces, it is possible to perform the construction while intersecting the cables 2.

In addition, the cable 2 is replaced from the supporting metal of the existing lining to the arch member 18 for temporary cable installation, and a large plate-shaped reinforcing member is provided in the space 25 on the back side of the cable 2 formed by the diameter reduction of the arch member 18. Since 11 is installed by the construction machine, rapid construction is possible, and it is possible to construct safely while crossing the cable 2 supported by the arch member 18.

Further, by tightening the spacer bolts 24 penetrating through the cable temporary arch member 18, the cable temporary arch member 18 is pressed against the existing inner surface 8a of the lining, so that the wind pressure and vibration during train running may cause It is stable to the load, and the cable 2 supported by the arch member 18 is also stably supported.

Since both the arch member 18 for temporarily installing the cable and the reinforcing member 11 are plate-shaped, the construction limit 1 in the tunnel is limited.
It is applicable even when 0 is severe. Also, by filling the back surface of the reinforcing member 11 with a time-curable material such as grout so as to fill the space 25 with the inner surface of the existing lining, the reinforcing member in which the entire arch crown of the tunnel is constrained with the time-curable material. Since it is covered by, it is possible to withstand not only the load due to wind pressure and vibration during train running, but also the drop of a large concrete block.

In the present invention, the structure of the embodiment may be modified in design, and for example, the number and width of divisions of the temporary cable arch member 18, the structure of the connecting metal piece 19, the structure of the reinforcing member 11 and the like may be appropriately changed. It may be changed and implemented.

[0039]

According to the present invention, the inner surface of the tunnel can be repaired.
During reinforcement work, a temporary cable arch that has a weight and size that can be handled by human power and that can be temporarily cut and removed so that it can be installed without interrupting normal business operation. Since the reinforcing member is installed while temporarily supporting the cable for communication between the train and the base station, it is possible to work quickly in a short time such as midnight when the train does not run, and
When the work takes several days, it is possible to operate while keeping the wiring supported by the arch member for temporary cable installation, so there are no periods or hours when trains cannot be run, which adversely affects the commercial operation of the railway. It has no effect.

Further, according to the present invention, by using the plate-like reinforcing member, the narrow space can be maintained without taking the construction limit into consideration.
It is not applicable when there is no room for the construction limit because the existing center reinforcement and liner plate reinforcement methods greatly violate the inside of the tunnel, while the reinforcement members with high strength can be installed in the space. The problem that the reinforcement method by pasting wire nets / nets had the problem that it could not withstand the fall of a large concrete block was solved.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing an overall outline of an inner surface of a tunnel under repair according to the present invention, in which the left side of the center part is a cable temporary arch member for temporarily supporting existing wiring in the tunnel, which is before the diameter reduction. The left side of the central portion shows the diameter after reduction.

2A is a transverse plan view of the tunnel ceiling portion of FIG. 1, and FIG. 2B is a vertical cross-sectional view of the central portion of FIG.

FIG. 3 (a) is an enlarged view of part (A) in FIG.
(B) is an enlarged view of (A ') part, (c) is a perspective view seen from the inside of the tunnel of (b).

FIG. 4 (a) is a front cross-sectional view of the upper left part of the inner surface of the tunnel, showing the state of the divided arch member at the time of initial installation.
[Fig. 4] is a right side view seen from the inside of the tunnel in (a).

FIG. 5 (a) shows the progress of the installation of the split cable shown in FIG.
FIG. 6B is a front sectional view of the upper left portion of the inner surface of the tunnel showing a state where the cable is being resized, and FIG.

FIG. 6 (a) is a front view of the upper left portion of the inner surface of the tunnel, showing a state in which a plurality of divided cable temporary arch members are connected to form an arch, and then the diameter is reduced and the cable is reloaded. A sectional view and (b) are right side views seen from the inside of the tunnel in (a).

7 (a) is a front cross-sectional view of the upper left portion of the inner surface of the tunnel showing a state where the reinforcement member is installed and the cable is reloaded from the arch member to the reinforcement member in the state of FIG. 7. , (B) are right side views seen from the inside of the tunnel in (a).

FIG. 8 is a cutaway perspective view of a tunnel in which wiring is attached to an inner surface of an existing lining.

[Explanation of symbols]

1 Existing tunnel lining 2 cables (wiring) 4 (Existing) Floor slab 5 sleepers 6 railroad rails 7 ground 8 lining concrete 10 building limits 11 Reinforcement member 11a split reinforcement member 12 Beam material 13 Lock plate 14 Connecting bolt 15 Anchor bolt 16 working holes 17 Volts 18 Arch member 18a split arch member 18b bent part 19 Consolidated hardware 20 fixing screws 21 Connection screw 22 Presser hardware 23 screws 24 Spacer bolt 25 spaces

Claims (3)

[Claims] 1. A repairing method for an inner surface of a tunnel lining, which is arranged at a predetermined interval in the tunnel axial direction and uses a cable temporary arch member composed of a plurality of divided arch members, which is parallel to an assembling work. Then, while changing the wiring on the inner surface of the lining from the existing supporting metal to the split arch member, the split arch members are detachably connected in the tunnel circumferential direction and assembled into the arch, and the split arch members are assembled into the arch,
The arch member is penetrated from the inner side of the tunnel toward the inner side of the lining, and the tip of spacer bolts provided at a required interval in the circumferential direction of the tunnel is applied to the inner surface of the tunnel so that the arch member is formed. Stable support, and then tightening the spacer bolts so that they project to the inner surface of the tunnel, the reaction force is applied to the spacer bolts to reduce the diameter of the arch member, thereby forming a space on the back side of the arch member. A plate-shaped reinforcing member is sequentially installed in the space, the arch member is removed after the wiring is changed from the arch member to the reinforcing member, and then the back surface of the reinforcing member is filled with a time-curable material. Repair method. 2. A plurality of divided arch members are applied to a connecting metal object and are detachably joined by bolts penetrating the abutting surface thereof, and both lower end portions of the divided arch members are axially moved in a tunnel. Removably bolted to the expanding beam,
The method for repairing an inner surface of a tunnel lining according to claim 1, wherein the arch member is manually arranged in the tunnel. 3. An arch member for temporarily installing the cable, and
The method for repairing the inner surface of the tunnel lining according to claim 1, wherein the reinforcing member is made of any material such as iron, aluminum, concrete, and FRP.