JP3167397B2 - Assembly base of lining plate unit and transport assist mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for repairing an inner wall of an existing tunnel with a plurality of repair plates, for example, by assembling a plurality of repair plates outside the tunnel in advance and forming a unit in the tunnel. The present invention relates to an assembling gantry for enabling transport and a transport assist mechanism for transporting the unit into a tunnel.

[0002]

2. Description of the Related Art The inner wall of an existing tunnel (for roads, etc.)
In the case of aging or partial damage, a plurality of precast concrete slabs (lining slabs) curved to the R along the inner wall are installed as arches along the inner wall, and joined together as a repair plate. In recent years, a method of repairing the inner wall by lining with a so-called concrete slab has been frequently used.

When the concrete slabs are installed on the inner wall and joined to each other, the concrete slabs are transported to the entrance of the tunnel, and then transported to the repairing section by a transfer device such as an erector, and the posture is adjusted along the inner walls. In the state of being installed on the inner wall, and then joining the joint fittings previously provided on the concrete slab,
A method of joining them together is common.

[0004]

In such a method, the main operations such as transferring the concrete slab to the inner wall and installing the concrete slab, and joining the concrete slabs together, are as follows.
Since the work is performed in a tunnel with a limited working space, the work is difficult and often subject to various restrictions.In addition, it is necessary to close the traffic of vehicles and the like in the tunnel during construction. Inconvenient on heavy roads.

[0005] In order to solve the above-mentioned problem, a method of assembling a plurality of concrete slabs in advance outside a tunnel to form a unit, transporting the unit to a repair section in the tunnel, and installing the unit on an inner wall is disclosed in the present application. The person has proposed before ( Japanese Patent Laid-Open No. 5-171900)
Information ). However, in assembling a plurality of concrete slabs into a unit, there has been a demand for the development of a so-called assembling gantry and a transport assisting mechanism for transporting the assembled unit into a tunnel, which can be performed easily and in a short time.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and as a first aspect, a lining plate unit in which a plurality of lining plates curved along an inner wall of a tunnel are connected in an arch shape, Transported to a predetermined position in the tunnel along a base wall having an upper surface parallel to a road surface in the tunnel and a side surface formed in a vertical plane facing the road surface in the tunnel, provided on a side portion of the inner wall of the tunnel; and When the lining plate unit is installed on the inner wall of the tunnel and lining the inner wall of the tunnel, the lining plate unit is assembled on a road surface adjacent to the entrance of the tunnel, and is installed as a pair of right and left to be able to be transported into the tunnel. A base installed on both sides of the road surface adjacent to the tunnel entrance, and installed to be able to move up and down with respect to the base, shorter than a width of the lining plate along a tunnel length direction. A plurality of support bases projecting upward at intervals and having a top surface substantially parallel to the road surface, and a horizontal wheel located between these support bases and projecting downward and having a vertical side surface facing the road surface side A main girder having a set portion integrally and extending substantially in parallel with the road surface along the length direction of the tunnel; and the base extending along the length direction of the tunnel between the support bases of the main girder. A vertical foil runway girder, the upper surface of which is a vertical foil runway that can be flush with the support surface of the main girder when the main girder descends, and the horizontal wheel of the main girder A horizontal foil runway which is fixed to the base in a state extending along the tunnel length direction between the set portions, and whose side surface on the road surface side is a horizontal foil runway flush with the horizontal wheel set portion. A girder and the vertical The upper surface of the il runway girder is continuously and flush with the upper surface of the foundation side wall, and the side surface of the horizontal foil rung spar is continuously flushed with the side surface of the foundation side wall. I have.

According to a second aspect of the present invention, there is provided a transport assist mechanism for a lining plate unit for transporting the lining plate unit assembled on the pair of right and left assembling stands into a tunnel. An installation work table which is arranged inside a lining plate unit assembled on a pair of left and right assembly bases and which can travel on a road surface from there toward a tunnel; and Towing girders extending in the tunnel length direction, which are connected to both sides of the base via a connecting mechanism, and a plurality of detachably mounted towing girders at intervals in the length direction, and the lining plate And a wheel unit that is detachably mounted to connect the towing girder and the lining plate unit.

According to a third aspect of the present invention, the connecting mechanism comprises:
A connection shaft that connects the tow girder and the installation worktable so as to be relatively movable along the tunnel width direction and the vertical direction, and is interposed between the connection shaft and the installation worktable, and buffers both relative movements; In the normal state, in the normal state, a buffer mechanism that keeps the gap between the towing girder and the installation work table constant, extends to the side of the towing girder, and is brought into pressure contact with the side surface of the foundation side wall by the buffering mechanism. It is characterized by comprising a guide wheel rotatable along a horizontal plane. According to a fourth aspect of the present invention, the wheel unit is removably mounted on a wheel unit mounting opening formed in the towing girder and the lining plate, and the casing is rotatably provided on the casing. The upper surface and the side surface of the foundation side wall are configured by a rollable vertical foil and a horizontal foil in a state of being mounted on a spar and a wheel unit mounting opening.

[0009]

According to the assembling base of the lining plate unit of the present invention,
While holding the main girder in the ascending position, on a plurality of supports that protrude above the upper surface of the vertical foil runway girder, a plurality of lining plates are joined in an arch shape to assemble a lining plate unit, and then After mounting the foil unit on each lining plate, the main girder is lowered, the vertical foil of the wheel unit is placed on the upper surface of the vertical foil runway girder, and the load of the lining plate is transferred to the wheel unit. From this state, the unit U is moved by the transport assist mechanism.
To the tunnel. In the lining plate unit, the vertical foil of the wheel unit extends from the upper surface of the vertical foil runway girder of the assembly stand to the upper surface of the foundation side wall, and the horizontal foil of the wheel unit extends from the side of the horizontal foil runway girder to the side surface of the foundation side wall. By rolling, it is transported into the tunnel.
That is, it is possible to assemble a lining plate unit including a plurality of lining plates in a state in which a foil unit for transporting into the tunnel is mounted, and the foil unit can be run on the assembling gantry and the foundation side wall. It can be easily performed by the assembling base of the present invention.

Further, according to the transport assisting mechanism of the present invention, the lining plate unit can be smoothly and easily transported from the assembly stand to the inside of the tunnel along the foundation side wall.

Further, according to the connecting mechanism for connecting the installation work table and the towing girder that constitute the transport assist mechanism, the installation work table that travels with unevenness or the like on the road surface receives a force to move vertically or horizontally from the road surface. Then, the force is buffered and is not transmitted to the lining plate unit, so that no trouble occurs in transporting the lining plate unit, and no force such as deformation acts on the installation worktable.

Further, according to the wheel unit of the present invention, it is possible to easily connect the traction plate of the transport assist mechanism to the lining plate unit, and to transport the lining plate unit on the assembling stand and the base wall. And In particular, the horizontal foil of the wheel unit rolls on the side surface of the upper girder of the horizontal foil runway girder of the assembly stand and the side surface of the foundation side wall, so that the lining plate unit can follow the road surface without meandering or the like. It is surely transported in the tunnel.

[0013]

FIG. 1 shows one end of an entrance and exit of an existing road tunnel T and an arbitrary cross section of the tunnel.
Is an inner wall of a tunnel T having an arcuate cross section constructed of cast concrete or the like, 1 is a road surface of a road, 2 is a concrete plate unit U by joining a plurality of concrete plates (lining plates) 3 in an arch shape. It is a pair of right and left assembly bases according to the present invention for assembling (lining plate units).

A concrete unit (hereinafter simply referred to as a unit) U assembled on the assembly base 2
Is transported to a portion to be repaired in the tunnel T and installed on the tunnel inner wall T1, thereby repairing the tunnel T. The transport of the unit U into the tunnel T is as follows.
A transport assist mechanism 5 having a wheel unit 4 according to the present invention is used.

On both sides of the inner wall T1 in the tunnel T facing the road surface 1, there are provided basic side walls 6 which serve as a transport path for the unit U and for mounting the unit U on the inner wall T1 of the tunnel. The foundation side wall 6 is formed at a predetermined height by casting concrete along the length of the tunnel T along the length thereof.
Is parallel to the road surface 2, and the side surface 6b facing the road surface 2 is vertical.

First, the concrete slab 3 will be described in detail. As shown in FIG. 2, the concrete slab 3 is an arc-shaped plate which is curved and formed into an R along the tunnel inner wall T1. The left and right upper end joining surfaces 3a facing each other and forming the shape of an arch are used as one set. The leg 3A serving as the lower end has a thicker inner surface than the other portion having a uniform thickness, and the inner surface of the leg 3A is along the vertical plane in a state where the leg 3A is assembled in a pair as described above. It has become.

As shown in FIG. 3, bolts are attached to the upper end joint surface 3a serving as a joint surface between the left and right concrete slabs 3 and the side end joint surface 3b serving as a joint surface between the front and rear concrete slabs. A plurality of joint fittings 7 each having a bolt through hole (not shown) for joining the concrete slabs 3 by being joined are provided for each of the joining surfaces 3a and 3b. A joint recess 8 is formed on the outer surface (convex surface) of the concrete slab 3 as a working space when the joint fittings 7 are bolted together.

As shown in FIG. 4, the leg 3A has
From the lower surface, the screw portion 9a of the vertical push bolt 9 is attached to the leg 3A.
The screw part 11 a of the horizontal push bolt 11 is screwed into the insert fitting 12 from the outer surface (convex surface). Vertical push bolt 9
The head 9b can be rotated with a tool such as a wrench from a counterbore 13 that opens to the inner surface of the leg 3A. In addition, the horizontal push bolt 11 is
A tool such as a driver inserted into the operation hole 14 formed over the inner surface of the leg 3A can be fitted into an engagement groove (not shown) formed at the tip of the screw portion 11a and rotated. Further, the head 3 of the horizontal push bolt 11 is attached to the leg 3A.
A counterbore 15 of 1b is formed. A plurality of these bolts 9 and 11 are provided at intervals in the width direction of the concrete plate 3.

The heads 9b and 11b of these bolts 9 and 11 are stored in the counterbore 13 and the counterbore 15 until the concrete plate 3 is finally installed on the inner wall T1 of the tunnel.

The leg 3A of the concrete slab 3 has a wheel unit mounting opening 16 for mounting the wheel unit 4 thereon. This wheel unit mounting opening 16
Is a pair of concrete slabs 3 and two concrete slabs 3
Are formed at positions where the distances between adjacent ones are equal, with the side end joining surfaces 3b being aligned with each other.

As shown in FIGS. 5 and 6, the wheel unit mounting opening 16 penetrates in the thickness direction of the concrete slab 3, and is open on the lower surface. The inner surface has a trapezoidal cross section, and when viewed from above, is formed in a wedge shape whose width increases from the outside to the inside of the concrete slab 3, and a steel plate 17 is stretched on its inner surface. A plurality of dowels 18 are embedded in the concrete plate 3 near the wheel unit mounting opening 16.

The inner side of the wheel unit mounting port 16 (outside of the concrete plate 3) is made of an equilateral angle iron.
A wheel unit mounting bracket 19 is provided. The wheel unit mounting bracket 19 has a length direction along the width direction of the concrete plate 3, a horizontal plate portion 19a aligned with the bottom surface of the concrete plate 3, and a vertical plate portion 19b arranged inside the concrete plate 3. The two ends are fixed to the side surfaces of the steel plate 17 by welding.

A through hole 20 is formed in the center of the vertical plate portion 19b of the wheel unit mounting bracket 19,
The nut 21 is welded to the outside of the vertical plate portion 19b in accordance with.

Above the wheel unit mounting opening 16 on the inner surface of the leg 3A of the concrete slab 3, a simple cylindrical insert 22 is embedded with the inner space facing the inner surface and orthogonal to the inner surface. ing.

In the concrete slab 3 having the above structure, a pair of left and right legs 3A, which are assembled in an arch shape, are connected to a tunnel T.
When the concrete slab 3 is placed on the left and right foundation side walls 6, the outer surface of the concrete slab 3 is slightly spaced from the inner wall T of the tunnel.
1 and the inner surface of the leg 3A of the concrete slab 3 is flush with the side surface 6b of the foundation side wall 6. In the case of the present embodiment, the concrete slab unit U is formed by assembling three right and left concrete slabs.

The assembling bases 2 are installed as a pair on the right and left sides of the road surface 1 immediately outside the entrance of the tunnel T. These assembling stands 2 are erected at equal intervals along the length direction of the road surface 1 (this direction is defined as the front-rear direction and the width direction of the road surface 1 perpendicular to the direction is defined as the left-right direction in the following description). Main girder 2 extending horizontally in the front-rear direction on a plurality of (five in this case) posts (bases) 23
4, a vertical wheel runway girder 25 and a horizontal wheel runway girder 26 have a basic structure. This assembling stand 2
Will be described in detail with reference to FIGS.

The posts 23, in which a pair of crosspieces 27b back and forth between a pair of longitudinal members 27a is assembled, each post 2
3 is set to a distance substantially equal to the width of the concrete slab 3.

Of the pair of left and right vertical members 27a, the road surface 1 side,
That is, the inner one (right side in FIG. 8) is slightly lower than the outer one, and a horizontal wheel runway girder 26 extending in the front-rear direction is fixed on the inner vertical member 27a. The horizontal wheel runway girder 26 includes a lower girder 28 and an upper girder 29, which are channel steels, and the grooves are directed outward and are fixed to each other by welding. Lower girder 28 and upper girder 2
Each of the side surfaces 28a and 29a facing the road surface 9 is flush with each other and is a vertical surface.

The lower girder 28 has a length extending over the posts 23 at the front and rear ends, and the vertical members 27 inside the respective posts 23.
It is fixed to the upper end of a by welding. On the other hand, upper digit 29
Are provided at intervals in a central portion between the posts 23 and at a position straddling each of the posts 23.

An outer girder 30 made of a channel steel and extending in the front-rear direction is provided on the outer vertical member 27a of the pair of left and right vertical members 27a with respect to the road surface 1 with the grooves facing inward. Are fixed by welding.

The main girder 24 is made of hollow steel pipe having a square cross section and has a main girder main body 31 having a length extending over the posts 23 at both front and rear ends. The main girder main body 31 is provided with a plurality of support bases 32 protruding from each other and a horizontal wheel set portion 33 positioned between the support bases 32 and protruding downward.
And is placed on each horizontal member 27b so as to fit in a groove formed by the left and right vertical members 27a and the horizontal foil runway girder 26.

The support table 32 is disposed at a position directly above each post 23 and at a position corresponding to the center between the posts 23. The upper surface 32 a of the support table 32 is in contact with the upper surface 31 a of the main girder main body 31 parallel to the road surface 1. The support surface is parallel and supports the concrete slab 3 placed thereon.

The horizontal wheel set portion 33 is made of a short channel steel, is disposed between the upper beams 29 of the horizontal wheel runway beam 26, and has a main beam with the groove facing outward. It is welded and fixed to the inner side surface of the main body 31. The side surface 33a facing the road surface 1 is a vertical surface, and is flush with the side surface 29a of the upper girder 29. The space between the horizontal wheel set sections 33 is set to be the same as the distance between the wheel unit mounting ports 16 provided on the legs 3A of the concrete plate 3.

The main girder 24 having the above structure is configured to be moved up and down by a jack device 34 provided on the post 23.

The jack device 34 is shown in FIGS.
As shown in FIG. 5, slightly below the cross members 27b of the posts 23 at the front and rear ends, the post members 23 are installed on a jack base 35 horizontally spanned between a pair of left and right vertical members 27a.
Collar 3 to which flange 36a formed at the lower end is fixed
6 and slidably and rotatably inserted into the collar 36,
It has a thread (not shown) on the peripheral surface of the upper end, and a nut 3 in the center.
7a is formed integrally with the jack rod 37 and the main girder 2
4 is received on its upper surface, and the cylindrical portion 38 is integrally fixed to the lower surface.
a is the abutment plate 3 screwed into the screw portion of the jack rod 37
And 8. The abutment plate 38 and the cylindrical portion 38a are provided with a rib plate 39 extending in the left-right direction, and a guide plate 40 extending in the front-rear direction.

According to the jack device 34, the nut 3
When the jack rod 37 is rotated by rotating 7a,
The screwing amount of the screw portion of the jack rod 37 into the cylindrical portion 38a fluctuates, whereby the abutment plate 38 moves up and down. When the abutment plate 38 is below the cross member 27b, the main girder 24 is placed on the cross member 27b and
The main girder 24 is supported by the abutment plate 38 and is moved up and down together with the abutment plate 38 in a state where the abutment plate 38 is positioned above the cross member 27b, supported by the support 7b. When the ratchet type wrench 41 is used for rotating the nut 37a, bidirectional rotation can be conveniently performed.

A smooth main girder 2 is provided between the horizontal wheel runway girder 26 and the outer girder 30 and the side surface of the main girder 24.
There is a slight gap in order to make it possible to move up and down.
Further, the guide plate 40 is sandwiched between the horizontal members 27b with a small gap therebetween and hits the horizontal members 27b, thereby performing a function of preventing the main girder 24 from swinging in the front-rear direction at the time of elevating.

The jack device 34 is provided on at least the front and rear ends 23 of the posts 23.

The vertical wheel runway girder 25 is disposed in a space between the supports 32 constituting the main girder 24. The vertical wheel runway girder 25 is formed by assembling a channel steel and extends in the front-rear direction.
Upper girder 2 which is parallel to
9 and the outer girder 30 and is fixed to the upper surface by welding.

The main girder 24 is a cross member 27 of each post 23.
b, the support base 3 constituting the main girder 24
2 upper surface 32a of vertical foil runway girder 25
And the jack device 34 has the main girder 2
When 4 rises, the upper surface 32a of the support base 32 projects above the upper surface 25a of the vertical foil runway girder 25. Main girder 24
The upper limit of the rise is that the main girder main body 31 or the horizontal wheel set portion 33 hits the vertical wheel runway girder 25, and the lower limit is a state in which the main girder body 31 or the horizontal wheel set portion 33 is supported by the cross member 27b as described above. In addition, the horizontal wheel set portion 33 when the main girder 24 is raised and lowered has its side surface 33a kept flush with the side surface 29a of each upper girder 29 constituting the horizontal wheel runway girder 26, and 29, when the main girder 24 is at its lower limit, its lower end is close to the horizontal foil runway girder 26.

When the main girder 24 is in the lower limit state, the upper surface 25a of the vertical wheel runway girder 25 and the upper surface 32a of the support base 32 constituting the main girder 24 are flush with each other, but these upper surfaces 25a, 32a Upper surface 6a of each foundation side wall 6
The support 32 provided at the end on the tunnel T side is continuous with the foundation side wall 6. The side surfaces 28a and 29a of the lower girder 28 and the upper girder 29 constituting the horizontal wheel runway girder 26 are continuous with the side surfaces 6b of the respective base side walls 6 in a state of being flush with each other.

The above is the assembling stand 2 for assembling the unit U according to the present embodiment. As shown in FIG. 1, a scaffold plate 42 extending in the front-rear direction is provided outside each of the posts 23 erected on both sides of the road surface 1 so as to be used as a work scaffold on which workers are placed. Have been.

A ladder-like assembly scaffold 43 formed along the outer peripheral surface of the unit U assembled on the pair of left and right assembly frames 2 is provided on the scaffold plate 42 so as to straddle the road surface 1. The assembled scaffold 43 is moved in the front-rear direction by a plurality of wheels 44 rolling on the outer peripheral surface of the unit U and the scaffold plate 42.

Next, a description will be given of a transport assist mechanism 5 having a wheel unit 4 for transporting the unit U assembled on the pair of right and left assembly frames 2 into the tunnel T.

The transport assist mechanism 5 includes the wheel unit 4, an installation worktable 45, a towing girder 46 and a connecting mechanism 47.

First, the installation work table 45 will be described. The installation work table 45 can run in the tunnel T. As shown in FIGS. 11 and 12, a pair of right and left vertical columns 48 is provided. A plurality of portal frames 50 with beams 49 bridged on the upper ends are connected and integrated by a connecting beam 51, and a scaffold 52 is fixed to each of the vertical columns 48. Each of the vertical columns 48 has a caster-type traveling wheel 53 attached to the lower end thereof.

As shown in FIG. 11, the installation work table 45 is arranged such that the length direction (the direction in which the portal frames 50 are arranged) is aligned with the length direction of the tunnel T and the center of the width direction is the tunnel. When it is arranged in the tunnel T in a state corresponding to that of the T, its dimensions are set so that a predetermined interval is left between the left and right vertical columns 48 and the beams 49 and the inner wall T1 of the tunnel T, The tip of 52 is adapted to approach the base side wall 6.

Each beam 49 is hinged about the longitudinal direction of the beam 49 as an axis, and a state in which the installation work table 45 is tilted forward or rearward is a stored state, and an upright state is a handrail. , A handrail 54 of an upside down type is provided. Further, a plurality of handrails 55 are fixed to the tip side of the scaffold 52 at appropriate mutual intervals in the length direction of the scaffold 52.

The tow girder 46 has a length corresponding to the entire length of the scaffold 52, and is attached to the tip of the scaffold 52 via the connecting mechanism 47. The towing girder 46 attached to the connecting mechanism 47 will be described. As shown in FIGS. 12 and 13, a plurality of wheel unit attachment portions 57 extending upward are provided on a base 56 which is an attachment portion to the scaffold 52.
However, they are integrally provided at equal intervals in the length direction of the base 56, and when viewed from the side (outside), the whole is comb-shaped, and the cross section of the portion including the wheel unit mounting portion 57 is L-shaped. Is formed.

Base 56 to wheel unit mounting portion 57
Is formed by assembling a shape steel such as an angle iron, and the front and rear end surfaces at the upper end of each wheel unit mounting portion 57 are formed as shown in FIG.
As shown in FIG. 4, a plate-like stay 58 for mounting the wheel unit 4 between the adjacent wheel unit mounting portions 57 is welded. These stays 58 extend in the front-rear direction, are provided with bolt through holes 58a,
The outer surface is welded to a nut 60 into which a bolt 59 for mounting a wheel unit is screwed, which is passed through a bolt through hole 58a.

The front and rear ends of the base 56 and the scaffold 52
The connecting mechanism 47 for connecting the both is provided at the front and rear ends of the tip facing outward.

The connecting mechanism 47 includes a U-shaped vertical bracket 61 having flanges 61b at both ends of a web 61a.
And a horizontal bracket 62 similar to the vertical bracket 61 and having a web 62a and flanges 62b at both ends are arranged in a cross-like manner with the flanges 61b and 62b facing each other, and are connected in a cross-like manner. Axis 6
The vertical axis 63a of each of the three flanges 61 of the vertical bracket 61
b, the horizontal shaft 63b is penetrated by each flange 62b of the horizontal bracket 62, and each shaft 63a of this connecting shaft 63,
A rectangular frame-shaped spring seat 64 is fixed to the intersection of 63b,
The outer periphery of each shaft 63a, 63b,
Between each flange 61b and the spring seat 64, and between each flange 62b of the horizontal bracket 62 and the spring seat 64,
Coil springs (buffer mechanisms) 65 and 66 are interposed respectively, and L
A guide wheel 68 is provided via a metal fitting 67 and configured.

The vertical bracket 61 has a web 61a fixed to the front and rear end faces of the base 56 of the traction beam 46.
In the horizontal bracket 62, the web 62a is fixed to the front and rear end faces of the tip facing the outside of the scaffold 52 via a stay (not shown). Each shaft 63a, 63b of the connection shaft 63 is
Each flange 61b of each bracket 61, 62,
62b, the connecting shaft 63 and the vertical bracket 61
Is relatively slidable in the vertical direction along the longitudinal axis 63a, and the connecting shaft 63 and the lateral bracket 62 are
It is relatively slidable in the horizontal direction along b. The relative slides are provided by the respective coil springs 65, 6
6 is regulated and buffered.

Outside the base 56 of the towing girder 46, a plurality of L-shaped fittings 67 each composed of a vertical portion 67a and a horizontal portion 67b are welded at regular intervals along the longitudinal direction of the base 56, and these L-shaped fittings 67 are welded. The guide wheel 68 that rotates along a horizontal plane is provided on the outer surface of the distal end of the vertical portion 67a of the metal fitting 67,
It is mounted rotatably. The lead of each L-shaped bracket 67
A wire clipper 70 constituting the traction mechanism 69 is detachably attached to the outer surface of the lower end of the straight portion 67a . The traction mechanism 69 including the wire clipper 70 will be described later.

The installation worktable 45 and the towing girder 46 are kept at a constant distance from each other by a connecting mechanism 47, and the distance between the tips of the left and right guide wheels 68 is smaller than that between the side surfaces 6b of the foundation side wall 6. It is set somewhat wide. Then, when the installation work table 45 is run and put into the tunnel T, the left and right guide wheels 68 hit the side surfaces 6b of the base side walls 6 on both sides, and the tow girders 46 move inside the tunnel T, and
By the force of the coil spring 66 , the left and right guide wheels 68
Are urged outward in the width direction of the tunnel T, and are pressed against the side surface 6b. Thereby, the installation worktable 45 is
The center in the width direction coincides with that of the tunnel T, and the distance between the left and right traction girders 46 and the side surfaces 6b of the base side walls 6 on both sides is kept constant.

Further, the movement of the towing girder 46 is restricted in the vertical and horizontal movements (ie, the vertical bracket 6).
1 does not move), for example, when the installation work table 45 is given a force to be moved up and down or in the width direction of the tunnel by the unevenness of the road surface 1 in the tunnel T, etc.
Slides up and down along the longitudinal axis 63a of the connecting shaft 63, or the horizontal bracket 62
By sliding along the tunnel width direction along b
The installation worktable 45 moves in these directions, and receives a force that always returns to the original posture (position) by the force of the coil springs 65 and 66.

Now, the wheel unit 4 is provided with
6 in such a state that it is bridged between the stays 58 of the respective wheel unit mounting portions 57, and is detachably mounted on these wheel unit mounting portions 57.

This wheel unit 4 is shown in FIGS.
Referring to FIG. 14, FIG. 15, FIG. 16, and FIG. 17, when the wheel unit 4 is attached to the stay 58, the wheel unit 4 includes a vertical wheel 71 and a horizontal wheel 72.
And a casing 73 that accommodates the vertical foil 71 while rotatably supporting the vertical foil 71 and that is detachably attached to the traction girder 46, and a bracket that is integrally fixed to the casing 73 and supports the horizontal foil 72. 74
The vertical wheel 71 rolls on the upper surface 6a of the base side wall 6, and the horizontal wheel 72 is mounted on the side surface 6 of the base side wall 6.
It is configured to roll b.

The casing 73 is formed by assembling steel plates and has a symmetrical shape. When viewed from above, a front part 75 having a slightly thinner tapered end when viewed from above is provided with a bracket plate 76 interposed therebetween. A rectangular parallelepiped rear portion 77 is fixed.

Bearing plates 78 and 79 are provided inside the front part 75 and the rear part 77, respectively.
A flange plate 80 is welded to the rear end of 7. In addition, an opening 75a is formed in a lower portion on the front end side of the front portion 75.

The flange plate 80 extends laterally long,
Elongated holes 80b are formed at both ends thereof for passing the bolts 59 for connecting the traction girders 46 to the stays 58.

The front end plate 81, the bearing plates 78 and 79, the bracket plate 76 and the flange plate 80 constituting the front part 75 are formed with shaft holes 81a, 78a, 79a, 76a and 80a, respectively. Holes 81a, 78a, 7
9a, 76a, 80a, the axis 82 of the vertical foil 71
Has been passed.

The shaft 82 has a small-diameter portion 82a at the distal end and a large-diameter portion 82b at another portion, a screw portion 82c at the distal end of the small-diameter portion 82a, and a bolt head at the distal end of the large-diameter portion 82b. 82d are formed. The screw portion 82c is
The diameter is slightly smaller than the small diameter portion 82a, and steps 82e and 82f are formed between the screw portion 82c and the small diameter portion 82a and between the small diameter portion 82a and the large diameter portion 82b, respectively. The screw portion 82c can be screwed into a nut 21 welded to the wheel unit mounting bracket 19 provided in the wheel unit mounting opening 16 of the concrete plate 3.

The shaft 82 is formed by a flange plate 80, a bearing plate 79, a bracket plate 76,
After passing through the shaft holes 80a, 79a, 76a, 78a of the bearing plate 78 and the shaft of the vertical foil 71 inserted into the front part 75 from the opening part 75a, the screw part 82c of the front end plate 81 It is inserted into the shaft hole 81a. In this state, the steps 82e and 82f of the shaft 82 are respectively connected to the front end plate 81 and the bearing plate 7
8 to prevent further insertion.

When the wheel unit 4 having the above structure is inserted into the wheel unit mounting opening 16 of the concrete plate 3 from the front part 75, the through holes 20 of the wheel unit mounting bracket 19 are formed.
Through the screw portion 82c and hit the nut 21. By screwing the screw portion 82c into the nut 21 using the bolt head 82d, the front portion 75 fits into the wheel unit mounting opening 16. Screw part 8 of shaft 82
When the screw 2c is screwed into the nut 21, the stepped portion 82f
As a result, the shaft 82 is fixed to the casing 73 or the concrete unit 3 of the wheel unit 4 itself is fixed to the wheel unit mounting opening 16 of the concrete unit 3. In this state, the vertical foil 71 is rotatably mounted on the shaft 82, and its lower end peripheral surface projects slightly below the opening 75 a of the front part 75 and projects from the lower surface of the concrete plate 3.

The flange plate 80 is screwed with a backing plate 83 having a through hole 83a large enough to allow the bolt head 82d of the shaft 82 to be turned.

The bracket plate 76 extends vertically, and an upper portion 84 above the casing 73 is formed in a triangular shape, and a pin through hole 84a is formed in an upper end portion thereof. A pin 85 to be inserted into the insert fitting 22 for temporarily fixing the wheel unit 4 to the concrete slab 3 is passed through the pin through hole 84a.

The bracket 74 of the horizontal wheel 72 is fixed to the lower end of a lower portion 86 of the bracket plate 76 extending below the casing 73.

The bracket 74 is made of a steel plate upper plate 8.
7, a lower plate 88 and a vertical plate 89, which are assembled in a U-shape opening toward the front part 75 of the casing 73.
7 is welded to the lower end of the lower portion 86 of the bracket plate 76.
A reinforcing plate 90 is welded from the upper end of the casing 73 to the rear portion 77 of the casing 73.

The upper plate 87 and the lower plate 88 of the bracket 74
A horizontal wheel 72 is rotatably mounted on the shaft 91. In this state, the outer peripheral surface of the horizontal wheel 72 protrudes slightly outward from the bracket 74.

The axial length (thickness) of the horizontal wheel 72 is
The distance between the upper plate 87 and the lower plate 88 is shorter than
Can be slid up and down with respect to an upper plate 87 and a lower plate 88, and the horizontal wheel 72 can move up and down together with a shaft 91. Normally, the coil spring 93 is provided between the spring seat 92 attached to the upper end of the shaft 91 and the coil spring 93 interposed between the spring plate 92 and the upper end of the shaft 91. .

The horizontal wheel 72 is a wheel unit 4
Is mounted on the wheel unit mounting opening 16 of the concrete slab 3 as described above, the outer peripheral surface thereof is in a state of protruding slightly outside the bracket plate 76.

The wheel unit 4 having the above-described structure can be mounted on the towing girder 46 provided on the installation work table 45 as follows.
And the concrete plate 3 to connect the two.

First, the front part 75 of the casing 73 of the wheel unit 4 is fitted into the wheel unit mounting opening 16 of the concrete slab 3 from between the adjacent wheel unit mounting parts 57 of the traction girders 46 and the bracket plate 76. The pin through hole 84a of the upper part 84 of the
And the pin fitting hole 84a and the insert fitting 22
, And the wheel unit 4 is temporarily fixed to the concrete slab 3.

Next, both ends of the flange plate 80 are applied to stays 58 extending from the wheel unit mounting portion 57, and the long holes 80b of both ends are inserted into the bolt holes 5 of the stay 58.
8a. Then, from the flange plate 80 side, the slot 8
0b, the bolt 59 is passed through the bolt through hole 58a and screwed into the nut 60.

Next, the wire clipper 7 attached to the L-shaped bracket 67 welded to the outside of the base 56 of the towing girder 46.
The traction mechanism 69 including zero will be described.

As shown in FIG. 13 and the like, the traction mechanism 69 is for transporting the transport auxiliary mechanism 5 into the tunnel T. The vertical portion 67a of the L-shaped bracket 67 has bolts 94 and nuts. The wire clipper 70 is detachably attached by a wire 95, a pulling wire 96 locked to the wire clipper 70, a wire hanger 97 fixed to the side surface 6b of the base side wall 6, and a near side of the tunnel T (the Pulling wire drive mechanisms 9 provided at the entrance and exit on the side where the assembly base 2 is installed) and on the opposite entrance and exit, respectively.
8 and a pulling wire tensioning mechanism 99.

The wire clipper 70 is formed by laminating two plate-like members 70a each having a predetermined length and extending in the length direction of the tunnel T. A plurality of screws 1 provided in the length direction are provided.
00, the lower ends of the plate-like members 70a are joined to each other, the grooves 101a extending in the longitudinal direction formed on the opposing surfaces thereof are aligned with each other to form a wire locking hole 101, and the bent portion, which is the upper end, is L It is a mounting part to the character fitting 67.
Then, with the screw 100 removed, the gap between the free ends is widened, and the upper winding portion 96a of the pulling wire 96 is inserted into the wire locking hole 101.
Then, if the plate-like members 70a are fastened to each other with the screw 100, the pulling wire 96 is attached to the wire clipper 70.

The wire hanger 97 includes a pair of left and right vertical frames 102 extending vertically, a horizontal frame 103 connecting lower ends of these frames 102, and each vertical frame 102.
A pair of upper and lower vertical rollers 104 respectively provided inside
(Upper vertical roller 104a, lower vertical roller 104b),
A pair of upper and lower horizontal rollers 105 (upper horizontal roller 105a, lower horizontal roller 105b) are provided between the vertical frames 102.

Each of the vertical rollers 104a and 104b is connected so as to rotate integrally, and furthermore, the upper horizontal roller 105a
Is connected to each of the longitudinal rollers 104a, 104 via a bearing 106a.
b, and the lower lateral roller 105b is
Are connected to the lower vertical roller 104b through the rollers 104a, 104b, 105a, and 105b.
If one of the connected objects rotates, the other rotates together.

The gap between each vertical roller 104a, 104b and each horizontal roller 105a, 105b is
Is set very small to the extent that does not fit.

In the wire hanger 97 having the above-described structure, one of the vertical frames 102 has the side surface 28 a of the lower girder 28 of the horizontal wheel runway girder 26 in the assembling gantry 2 and the side wall 6
It is fixed to the side surface 6b by means such as bolting at an appropriate interval. The fixed height position is set to a position where the lower end of the wire clipper 70 is disposed between the left and right upper vertical rollers 104a in a state where the installation worktable 45 is placed on the road surface 1.

The pulling wire drive mechanism 98 is provided on a jack frame 107 installed at the end of the pair of right and left assembly frames 2 .

As shown in FIGS. 1 and 18, the jack frame 107 is formed by horizontally extending a beam 109 between the upper ends of a pair of right and left vertical columns 108 erected on both sides of the road surface 1. Then, each vertical column 108 and beam 109 are
It is made of hollow section steel having a square cross section and is joined to each other by welding.

Then, the pulling wire drive mechanism 98 is the same as that shown in FIG.
As shown in 8 and 19, the front of the center of the beam 109,
That is, the front and back of the beam 109 orthogonal to the axial direction of the tunnel T
A geared motor 110 mounted on a surface opposite to the building side of the tunnel T of the surface, the differential is operated by a geared motor 110 disposed within the center of the beam 109 gear 11
A pair of left and right first drive shafts 112 arranged in a beam 109 and connected to a differential gear 111;
08, each second drive shaft 114 connected to each first drive shaft 112 via a first bevel gear 113, and attached to the inner side surface of each vertical column 108, Each wire capstan 116 is connected to the lower end of the drive shaft 114 via a second bevel gear 115.

Further, as shown in FIG. 19, the pulling wire tensioning mechanism 99 includes a reaction force table 117 disposed on the left and right of the entrance and exit of the tunnel T on the side opposite to the side where the jack frame 107 is provided. The wire sheave 118 is screw-connected to the reaction table 117 and has a handle 119 attached to the tip thereof.

According to the pulling wire driving mechanism 98 and the pulling wire tensioning mechanism 99, the pulling wire 96 is wound around the wire capstan 116 at least a plurality of times (3 to 4 times) and the wire capstan 116 and the wire sheave 118 are wound. Then, the handle 119 is rotated to take a reaction force on the reaction force table 117, and the pulling wire 96 is tensioned until it reaches an appropriate tension. When the geared motor 110 is operated from this state, the driving force is transmitted through the differential gear 111, the first drive shaft 112, the first bevel gear 113, the second drive shaft 114, and the second bevel gear 115 to the wire capstan. The rotation of the wire capstan 116 causes the pulling wire 96 to move as shown by an arrow (a: feed direction) or an arrow (b: return direction) in FIG.
Activate

Since the pulling wire 96 is wound around the wire capstan 116 a plurality of times, the rotation of the wire capstan 116 is transmitted to the pulling wire 96 by frictional force.
Further, the rotation of each first drive shaft 112 due to the driving force of the geared motor 110 is reversed by the differential gear 111, and as a result, the operating directions of the left and right pulling wires 96 become the same.

Also, the jack frame 107 has:
A plurality (6 in this case, 6)
When the unit U is assembled with the concrete slab 3), an arm jack 120 is provided extending to the tunnel T side to support the first concrete slab 3 installed on the left assembling gantry 2.

As shown in FIGS. 21 and 22, the arm jack 120 has a jack 123 and a concrete plate support 124 at the tip of an arm body 122 having a bulge 121 at the tip.

The arm body 122 is a hollow body having a rectangular cross section formed by appropriately forming a steel plate and joining by welding. The arm body 122 stands up in the front-back direction and diagonally upward, and The base is welded slightly to the left of the center.

The jack 123 has a pair of upper and lower screws welded to the tip of the bulging portion 121 of the arm body 122 in a state where a screw thread is formed on the inner peripheral surface and their axes are coaxial with each other along the vertical direction. Cylinders 125 and 126 and these screw cylinders 1
A bolt 127 which is screwed into each of the bolts 25 and 126 and integrally has a nut 127a at substantially the center thereof,
It is composed of

The concrete slab support portion 124 is provided with a jack 123 in the bulging portion 121 of the arm body 122.
The guide 129 is provided on one side (the left side facing the tunnel T in this case, the right side in FIG. 22 in this case) and fixed to the side. Slide shaft 13 slidably inserted
0, and a support plate 131 fixed to one end of the slide shaft 130.

The outer periphery of the guide 129 is welded to the side surface of the bulging portion 67 with the axis line extending in the vertical direction.
Are slidably inserted into the guide 129. The support plate 131 is a horizontal plate 131a orthogonal to the slide shaft 130, and a vertical plate which is welded to one side (in this case, the left side toward the tunnel T) of the horizontal plate 131a and has a bolt through hole (not shown). L-shaped section 131b.

According to the arm jack 120 configured as described above, first, the lower surface of the upper end of the first concrete plate 3 installed on the left assembling stand 2 is received by the receiving plate 128 of the jack 123 and the nut By rotating 127 a in an appropriate direction with a ratchet type spanner 132, the height of the receiving plate 128 is adjusted to adjust the posture of the concrete plate 3. Next, the slide shaft 130 of the concrete slab support portion 124 is slid upward, and the bolt through hole of the vertical plate 131b of the support plate 131 is aligned with the bolt through hole of the joint fitting 7 at the upper end joining surface 3a of the concrete slab 3. Then, the nut 134 is screwed into the bolt 133 passed through these bolt through holes, and
1 and the joint fitting 7 are connected. Thereby, the arm jack 120 supports the first concrete plate 3 placed on the left side.

With the concrete plate 3 supported by the arm jack 120 in this manner, the receiving plate 128 of the jack 123 is located on the lower surface of the substantially central portion of the width of the concrete plate 3, as shown in FIG. Is set as
Further, as shown in FIG. 7, the wheel unit mounting opening 16 formed in the concrete plate 3 is
4 is located just above the horizontal wheel set portion 33.

Note that the jack frame 107 has:
As shown in FIG. 12, a ladder 13 serving as a work scaffold is provided.
5. A scaffold 136 is provided.

Next, the procedure of assembling a plurality of concrete slabs 3 in an arch shape on the pair of left and right assembling bases 2 and joining them together to assemble one concrete slab unit U will be described with reference to FIGS. This will be described below with reference to FIG. The transfer of the concrete slab 3 and the adjustment of the posture are performed by the crane K and the suspension wire W.

First, the main girders 24 of the left and right assembling gantry 2 are raised by the jacks 34 and set at the upper limit positions, and the upper surfaces 32a of the respective support stands 32 project from the upper surfaces 25a of the vertical wheel runway girder 25. And Next, tunnel T
The first concrete plate 3-1 (the first concrete plate) 3-1 (the first upper surface 32a) is located on the front end (the jack frame 107 side) of the assembly base 2 on the left side toward
The leg 3A is placed on the concrete slab 3-1) with the bending direction oriented along the tunnel T. The first concrete slab 3-1 has an end in the width direction that is closer to the front side.
It is located on the three posts 23, and the end and the center thereof are placed on the support 32, that is, placed on the three supports 32.

As described above, the first concrete slab 3-1
The state in which the leg 3A is placed on the left assembly stand 2,
1st concrete slab 3-1 while holding with crane K
Of the two fittings 7 provided on the upper end joint surface 3a of the arm jack 120 is the arm jack 120
Plate 1 in concrete slab support portion 124
The position of the first concrete slab 3-1 in the front-rear direction is finely adjusted so as to match the vertical plate 131b of the first slab 31. Then, as described above, the lower surface of the upper end of the first concrete plate 3-1 is received by the receiving plate 128 of the jack 123, and the nut 127a of the bolt 127 is rotated in an appropriate direction by the ratchet type spanner 132. , Backing plate 1
28, the first concrete slab 3
-1 is adjusted in the vertical swinging direction, and the vertical position of the support plate 131 of the concrete slab support portion 124 is adjusted.
31b) and the joint fitting 7 with the bolt 133 and the nut 13
4 for binding.

As described above, the first concrete plate 3-1 placed on the left assembling stand 2 is moved to the arm jack 1
20 and then the main girder 2 of the right assembly stand 2
4 on the (upper surface 32a of) the support 32, facing the first concrete slab 3-1 so that the bending direction is in a posture along that of the tunnel T, and is wider than the first concrete slab 3-1. The leg 3A of the second concrete slab 3 (the second concrete slab 3-2) is placed in a state shifted to the half tunnel T side, and the upper end joint surface 3a is connected to the first concrete slab 3 -1 against the upper end joining surface 3a. In this state, the second concrete slab 3-2 is supported by the first concrete slab 3-1 and its posture is maintained.

The joint 7 of the first concrete plate 3-1 (on the tunnel T side) and the joint 7 of the second concrete plate 3-2 (on the side opposite to the tunnel T) at the upper end joining surfaces 3a butted against each other. And the first and second concrete plates 3-1 and 3
-2 are joined.

Next, in the same manner as in the first concrete slab 3-1, the third concrete slab (the third concrete slab 3)
-3) is placed on the support 32 of the main girder 24 of the left assembling stand 2 and next to the first concrete slab 3-1 (the side of the tunnel T), and the side end joining surface on the near side is placed. 3b is aligned with the side end joining surface 3b of the first concrete slab 3-1 and the upper end joining surface 3a is abutted against the upper end joining surface 3a of the second concrete slab 2-2.

In this state, the third concrete plate 3-3
Is supported by the second concrete plate 3-2 and its posture is maintained, and the joint fitting 7 on the tunnel T side of the upper end joint surface 3a of the second concrete plate 3-2 and the third concrete plate 3-3 The joint fitting 7 on the near side of the upper end joining surface 3a is matched, and the joint fitting 7 on the side end joining surface 3b on the tunnel T side of the first concrete plate 3-1 and the near side of the third concrete plate 3-3. And the joint fitting 7 on the side end joining surface 3b. Then, the joint fittings 7 in which the upper end joint surface 3a and the side end joint surface 3b coincide with each other are joined by bolts and nuts. Thus, the third concrete plate 3 with respect to the first and second concrete plates 3-1 and 3-2
-3 is made.

The same steps as above are repeated, and as shown in FIG. 23, the first, third and fifth concrete plates 3-1 and 3 placed on the support 32 of the left assembling stand 2 -3, 3-5, the second, fourth, and sixth concrete slabs 3-2, 3-4, and 3-6 on the right side with a width of 1 on the tunnel T side.
/ 2 shifted. In this manner, a total of six concrete slabs 3 (first to sixth concrete slabs) are placed on the support base 32 of the left and right assembling gantry 2 projecting from the upper surface 25a of the vertical foil runway girder 25 of the main girder 24 in the raised state. Plates 3-1 to 3-6) are assembled in an arch shape and one unit U
Assemble. During or after the assembly of the unit U, the connection between the arm jack 120 and the first concrete plate 3-1 is disconnected.

In a state where the unit U is assembled,
Each wheel unit mounting port 16 of each concrete plate 3 is
It is located just above the horizontal wheel set part 33 in the main girder 24. In addition, each concrete plate 3 of unit U
Is on each support 32 and is in a state of floating from the upper surface 25a of the vertical foil runway girder 25.

The joining operation of the concrete slabs 3 is performed while an operator climbs a scaffold 43 provided over each scaffold plate 42 of each assembling base 2 and moves the scaffold 43 back and forth as appropriate.

Next, the unit U assembled on the pair of left and right assembling frames 2 as described above
And after being transported into the tunnel T by the traction mechanism 69,
A method of installing on the inner wall T1 of the tunnel T and lining the inner wall T1 will be described step by step.

First, the installation work table 45 with the tow girder 46 connected to the scaffold 52 is arranged between the left and right assembling stands 2.

Next, the wheel unit 4 is mounted on the towing girder 46 and each of the wheel unit mounting openings 16 of each of the concrete slabs 3 of the unit U, and the towing girder 46 and the unit U are connected.

That is, the installation work table 45 is appropriately moved back and forth on the road surface 1, and the respective wheel unit mounting ports 16 of the respective concrete plates 3 are arranged between the respective wheel unit mounting portions 57 of the traction girders 46. The front portions 75 of the plurality of wheel units 4 are inserted and fitted into the wheel unit mounting openings 16 from the inside between the wheel unit mounting portions 57, respectively.

Then, the bolt holes 84a of the upper portion 84 of the bracket plate 76 of the wheel unit 4 are aligned with the insert fittings 22, and the pins 85 are inserted into the insert fittings 22 to temporarily fix the foil unit 4 to the concrete plate 3. After that, the screw portion 82 of the shaft 82 of the vertical foil 71
c is screwed into a nut 21 welded to the wheel unit mounting bracket 19 to fix the shaft 82, and the wheel unit 4
Is mounted on all of the wheel unit mounting openings 16 in the concrete slab 3 of the unit U. In this state, the peripheral surface of the horizontal wheel 72 of the wheel unit 4 comes into contact with the horizontal wheel set portion 33 of the main girder 24 of the assembly stand 2.

Next, the main girder 24 is lowered by the jack device 34 until the peripheral surface of the vertical foil 71 touches the upper surface 25a of the vertical foil runway girder 25, and the flange plate at the rear end of the wheel unit 4 is moved. The bolt 80 secures the stay 80 to the stay 58 fixed to the wheel unit attachment portion 57 of the towing girder 46. At this time, the towing girder 46 is slightly moved up, down, left and right as required, and the stay 58 is moved to the flange plate 8.
Align to zero. Thereby, the wheel unit 4
Unit U and the installation workbench 4 via the towing girder 46
5 are connected.

Thus, the unit U and the installation worktable 4
After the connection with 5, the main girder 24 is lowered to the lower limit by the jack device 34, and the unit U is supported on the left and right assembling pedestals 2 by the respective wheel units 4. That is, the load of the unit U is changed to each vertical wheel 71 of each wheel unit 4.
Transfer to In this state, the bottom surface of the leg 3A of each concrete slab 3 is connected to the upper surface of the assembling gantry 2 (the vertical wheel runway girder 25 and the support pedestal 32 which are flush with each other on the main girder 24).
And the upper surfaces 25a and 32a).

Next, the tunnel T
To the part to be repaired.

First, the wire clipper 70 of the traction mechanism 69
Is attached to an L-shaped bracket 67 fixed to the traction girder 46 by bolts 94 and nuts 95, and a traction wire 96
By attaching the upper winding portion 96a to the wire clipper 70, the pulling wire 96 and the installation worktable 45 are connected. Then, the pulling wire drive mechanism 98 operates the pulling wire 96 in the feed direction, and causes the installation worktable 45 to travel toward the tunnel T.

As the installation worktable 45 travels, the unit U connected to the installation worktable 45 by the wheel unit 4 and the traction girder 46 is assembled such that the vertical foil 71 of the wheel unit 4 is flush. Each vertical wheel running girder 25 of the gantry 2 and each upper surface 25a of each support 32,
32a, and the horizontal wheel 72 rolls on each horizontal wheel runway girder 26 of the assembling gantry 2 and each side surface 26a, 33a of the horizontal wheel set 33, which is also in the same plane, thereby assembling. It is transported on the gantry 2.
That is, the unit U is transported toward the tunnel T using the assembly base 2 as a transport path.

Then, when the installation work table 45 enters the tunnel T, the unit U also enters the tunnel T, but the transport path in the tunnel T becomes the left and right base side walls 6 and continues. The vertical foil 71 rolls on the upper surface 6a of the foundation side wall 6, and the horizontal foil 72 rolls on the side face 6b of the foundation side wall 6, so that they are transported into the tunnel T.

At this time, for example, when the installation work table 45 receives a vertical or horizontal force due to unevenness or the like on the road surface 1,
As described above, due to the action of the coupling mechanism 47, the force moves and moves up and down or left and right, but this movement is buffered, and no force such as deformation acts on the installation worktable 45.

When the installation workbench 45 is run by the traction mechanism 69 as described above, if the road surface 1 has a slope, the traction wire 96 receives a force to move upward or downward accordingly.

For example, in the case of an uphill slope, when the pulling wire 96 is pulled upward according to the slope,
When the lower winding portion 96b of the pulling wire 96 contacts the upper horizontal roller 105a of the wire hanger 97, and when the pulling wire 96 is pulled downward by the slope of the downhill, the upper winding portion 96a of the pulling wire 96 becomes the upper horizontal roller. 105a,
Further, the lower winding portion 96b contacts the lower horizontal roller 105b. In this way, by contacting each of the lateral rollers 105a and 105b, the pulling wire 96 is maintained substantially along the road surface 1 and each of the lateral rollers 105a and 105b
It works smoothly while rotating.

Further, when the tunnel T is curved left or right, the upper winding part 96a and the lower winding part 96b of the pulling wire 96 are respectively attached to the upper and lower vertical rollers 104a and 104b of the wire hanger 97 inside the curve. In contact, the puller wire 96 operates substantially along the curve of the tunnel T.

In this way, the wire hanger 97 does not hinder the operation of the pulling wire 96 regardless of the form (slope, curve) of the tunnel T. As a result,
The installation worktable 45 runs smoothly.

In particular, when there is no curve in the tunnel T, the left and right vertical rollers 104 (104a, 104b) are not necessary, so the horizontal rollers 105 (105) shown in FIG.
a, 105b) may be a wire hanger 97A provided only.

As described above, the installation work table 45 is caused to travel on the road surface 1 in the tunnel T by the traction mechanism 69, and
When the unit U has been transported to the portion to be repaired in the tunnel T, the unit U is installed on the inner wall T1 of the tunnel T.

To mount the unit U on the inner wall T1,
First, the vertical push bolt 9 embedded in each concrete slab 3 is rotated in the pulling direction, and the vertical push bolt 9
The unit U is slightly raised by abutting the head 9b of the base member 6 on the upper surface 6a of the base side wall 6 and further rotating in the same direction from the head 9b. Head 11b of bolt 11
Is pressed against the inner wall T1 of the tunnel T to restrict the unit U from moving laterally outward. Thus, unit U
Is transferred from the vertical foil 71 of the wheel unit 4 to the vertical push bolt 9. At this time, the wheel unit 4 also slightly rises together with the unit U. However, the horizontal wheel 72 in contact with the side surface 6b of the base side wall 6 is digged by the coil spring 93 and relatively lowered with respect to the wheel unit 4. , Whereby uneven wear of the peripheral surface of the horizontal wheel 72 is prevented.

Next, the wheel unit 4 is removed from the wheel unit mounting opening 16 and from the towing girder 46, and the connection between the towing girder 46 and the unit U is released.

Thus, unit U is connected to tunnel T
When the installation work table 45 is installed on the inner wall T1, the traction mechanism 69 is operated in the reverse manner to move the installation work table 45 out of the tunnel T.

As described above, the repair of the inner wall T1 of the tunnel T is completed. However, if the repaired portion cannot be covered by one unit U, or if the repaired portion is located at another distant place, the above process is performed. Then, the unit U is installed in the repair part. In the above case, the concrete plate 3
Are formed as one unit U, three in each case on the left and right sides, but one unit U may be constituted by concrete slabs of a number corresponding to the range of the repaired part.

Further, when repairing the entire inner wall T1 of the tunnel T, the above steps are repeated to mount the unit U on the entire inner wall T1. In this case, the unit U to be installed first and last is joined with a concrete plate molded to half the width of the concrete plate 3 on its end side in order to match its end face to the entrance end of the tunnel T. The unit U in FIG. 12 shows the first concrete slab unit U, and reference numeral 3-0 denotes a concrete slab of half its width.

According to the assembling base 2 of the present embodiment, the mounting of the wheel unit 4 for transporting the unit U into the tunnel T in a state where the support 32 constituting the main girder 24 is raised. It becomes easy and the support 3
By lowering 2 and transferring the load of the unit U to the wheel unit 4, the unit U can be transported into the tunnel T by the wheel unit 4. That is, a plurality of concrete slabs 3 can be assembled into the unit U in a state where the wheel unit 4 for transporting into the tunnel T can be mounted and the wheel unit 4 can be run on the assembly base 2. , This assembly base 2
Can be easily performed.

Further, according to the transport assist mechanism 5 for transporting the unit U, the transport of the unit U from the assembly stand 2 to the tunnel T along the foundation side wall 6 can be performed smoothly and easily.

According to the connecting mechanism 47 for connecting the installation work table 45 and the towing girder 46 that constitute the transport assist mechanism 5, the installation work table 4 that travels with unevenness on the road surface 1 or the like.
When 5 receives the force to move up and down or left and right from the road surface 1,
The force is buffered and is not transmitted to the unit U, so that there is no trouble in transporting the unit U, and no force such as deformation acts on the installation worktable 45.

Further, according to the wheel unit 4 of this embodiment, the connection between the towing girder 46 of the transport assist mechanism 5 and the unit U is facilitated, and the transport of the unit U on the assembling gantry 2 and the base side wall 6 is facilitated. Is possible. In particular, when the horizontal wheel 72 of the wheel unit 4 rolls on the side surface of the upper girder 29 of the horizontal wheel runway girder 26 of the assembling gantry 2 and the side surface 6b of the foundation side wall 6, the unit U may meander. And is reliably transported along the road surface 1 into the tunnel T.

The unit U assembled by the assembling gantry 2 is connected to the assembling gantry 2 and the base side wall 6 in the tunnel T.
According to the tunnel repair method of this embodiment in which the unit U is mounted on the inner wall T1 after being transported to the repair section in the tunnel T by traveling
Of the inner wall 1 is completed at a time. For this reason, the construction period required for repair is greatly reduced.

Further, since the work of connecting the concrete slabs 3 is performed in the space outside the tunnel T, the work can be easily performed without being restricted by various restrictions. It does not need to be completely closed and is particularly effective when applied to roads with heavy traffic. As shown in FIG. 26, when the concrete slab 3 is set on the assembling gantry 2 by the crane K and when the
For example, when the unit U is transported, the vehicle M can pass one way (one-sided traffic), and as shown in FIG. 27, when the work is suspended, the vehicle M can pass each other (normal traffic).

[0137]

As described above, according to the assembling stand of the lining plate unit of the present invention, the wheel unit for transporting the inside of the tunnel is mounted, and this foil unit is mounted on the assembling stand and the base side wall. It is easy to assemble a lining plate unit including a plurality of lining plates in a state where the lining plate can be run on the lining plate. And since the connection work between the lining plates is performed outside the tunnel, the work can be easily performed without being limited by various restrictions, and it is not necessary to completely close the traffic of vehicles and the like in the tunnel during construction, It is particularly effective when applied to roads with heavy traffic, and shortens the construction period of the lining work of the tunnel inner wall with a plurality of concrete slabs.

According to the transport assist mechanism for transporting the lining plate unit, the lining plate unit can be smoothly and easily transported from the assembly stand to the inside of the tunnel along the foundation side wall.

Further, according to the connecting mechanism for connecting the installation work table and the towing girder that constitute the transport assist mechanism, the installation work table that travels with unevenness or the like on the road surface receives the force to move vertically or horizontally from the road surface. Then, the force is buffered and is not transmitted to the lining plate unit, so that no trouble occurs in transporting the lining plate unit, and no force such as deformation acts on the installation worktable.

Further, according to the wheel unit of this embodiment, the connection between the towing girder of the transport assist mechanism and the lining plate unit is facilitated, and the lining plate unit is transported on the assembly stand and the side wall of the foundation. Make it possible. In particular, the horizontal foil of the wheel unit rolls on the side surface of the upper girder of the horizontal foil runway girder of the assembly stand and the side surface of the foundation side wall, so that the lining plate unit can follow the road surface without meandering or the like. It is surely transported in the tunnel.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an assembling pedestal according to an embodiment of the present invention installed at one end of an entrance and exit of an existing road tunnel and an arbitrary cross section of the tunnel;

FIG. 2 is a front view showing a state in which the inner wall of the tunnel is covered by a concrete slab unit transported into the tunnel from the assembly base of one embodiment.

FIG. 3 is a side view showing a joint fitting of a concrete plate.

FIG. 4 is a sectional view of a leg of the concrete slab.

FIG. 5 is a side view of a wheel unit mounting opening and a wheel unit.

FIG. 6 is a front view of a wheel unit mounting opening.

FIG. 7 is a partial side view of the assembly base of one embodiment.

FIG. 8 is a partial front sectional view of the assembly base.

FIG. 9 is a partial front sectional view of the assembly base.

FIG. 10 is a partial front sectional view of the assembly base.

FIG. 11 is a front view of a tunnel and an installation work table.

FIG. 12 is a side view of a concrete slab conveyance assisting mechanism.

FIG. 13 is a front view showing a part of a towing girder, a wheel unit, and a towing mechanism.

FIG. 14 is a plan sectional view showing a coupling mechanism between the wheel unit and the towing girder.

FIG. 15 is a side view of the wheel unit.

FIG. 16 is a plan view of the same.

FIG. 17 is a rear view of the wheel unit.

FIG. 18 is a front view of a pulling wire drive mechanism.

FIG. 19 is a side view of a pulling wire drive mechanism and a pulling wire pulling mechanism.

FIG. 20 is a plan view of a differential gear and a gear motor portion of the pulling wire drive mechanism.

FIG. 21 is a side view of the arm jack.

FIG. 22 is a front view of a concrete slab support portion of a jack frame and an arm jack.

FIG. 23 is a plan view of a concrete plate unit.

FIG. 24 is a front view of a modification of the wire hanger.

FIG. 25 is a side view of the transport assist mechanism.

FIG. 26 is a front view of a state where a concrete plate is set on an assembly base.

FIG. 27 is a front view of a state in which a concrete plate is set on an assembly stand.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road surface 2 Assembly stand 3 Concrete plate (lining plate) 4 Wheel unit 5 Transport auxiliary mechanism 6 Foundation side wall 6a Upper surface of foundation side wall 16 Wheel unit mounting port 23 Post (base) 24 Main girder 25 Vertical foil runway girder 25a Vertical foil Top surface of runway girder 26 Horizontal wheel runway girder 29a Side surface of horizontal wheel runway girder 32 Support base 32a Upper surface of support base (support surface) 33 Horizontal wheel set part 33a Side surface of horizontal wheel set part 45 Installation workbench 46 Tow girder 47 Connection mechanism 63 Connecting shaft 65, 66 Coil spring (buffer mechanism) 68 Guide wheel 71 Vertical wheel 72 Horizontal wheel 73 Casing T Tunnel T1 Tunnel inner wall U Concrete plate unit

Claims (4)

(57) [Claims] A lining plate unit comprising a plurality of lining plates curved along an inner wall of a tunnel and connected in an arch shape, provided on a side portion of the inner wall of the tunnel, an upper surface parallel to a road surface in the tunnel and a tunnel. The lining plate unit is transported to a predetermined position in a tunnel along a foundation side wall having a side surface formed in a vertical plane facing a road surface inside, and installed on the inner wall of the tunnel to lining the inner wall of the tunnel; Assembled on the road surface adjacent to the tunnel entrance, and an assembling pedestal installed as a pair of left and right to be transportable in the tunnel, a base installed on both sides of the road surface adjacent to the tunnel entrance, It is installed so as to be able to move up and down with respect to the base, and projects upward at an interval shorter than the width of the lining plate along the length direction of the tunnel. A plurality of support bases and horizontal wheel set portions which are located between the support bases and project downward and face the road surface side are vertical planes, respectively, and are substantially parallel to the road surface along the tunnel length direction. A main girder extending along the length direction of the tunnel between the support bases of the main girder, and fixed to the base, and the upper surface thereof is provided when the main girder is lowered. A vertical foil runway girder, which is a vertical foil runway capable of being flush with the support surface of the girder, and the base extending in a tunnel length direction between the horizontal wheel set portions of the main girder. The vehicle is fixed to a table, and the side surface on the road surface side includes a horizontal wheel set part and a horizontal wheel run girder that is a horizontal wheel runway in a state of being flush with the upper surface of the vertical wheel runway girder, Continuously flush with the top surface And a side surface of the horizontal foil runway girder is flush with the side surface of the foundation side wall. 2. A transport assisting mechanism for a lining plate unit for transferring the lining plate unit assembled on a pair of left and right assembling pedestals into a tunnel, according to claim 1. An installation workbench that is arranged inside the lining plate unit assembled on a pair of assembly bases and that can travel on the road surface from there toward the tunnel, and on both sides of this installation worktable A towing girder extending in the length direction of the tunnel connected via a connecting mechanism, and a plurality of detachably attached to the towing girder at intervals in the length direction, and detachably attached to the lining plate. A transport assist mechanism for a lining plate unit, comprising: a wheel unit mounted to connect the traction girder and the lining plate unit. 3. The connecting mechanism includes: a connecting shaft that connects the towing girder and the installation worktable so as to be relatively movable along a tunnel width direction and a vertical direction; and a connection shaft between the connection shaft and the installation worktable. A buffer mechanism interposed and buffers the relative movement of both, and in a normal state, a buffer mechanism for maintaining a constant distance between the towing girder and the installation work table; 3. The transport assisting mechanism for a lining plate unit according to claim 2, further comprising a guide wheel that is pressed against said side surface and is rotatable along a horizontal plane. 4. A casing detachably mounted on a wheel unit mounting opening formed in the towing girder and the lining plate, wherein the foil unit is rotatably provided on the casing. With the wheel unit installed in the opening,
The transport assist mechanism for a lining plate unit according to claim 2, further comprising a vertical foil and a horizontal foil that can roll on the upper surface and the side surface of the foundation side wall.