JPH0666095A - Tunnel covering device - Google Patents

Abstract

PURPOSE:To simultaneously carry out a drilling work for forming a blasting hole in the working face of an excavated tunnel and a concrete covering work for the wall surface of the tunnel. CONSTITUTION:A support beam member 8 is supported on a bogie 1 which is movable longitudinally in a tunnel T, a guide rail 4 formed in a shape extending along the wall surface (t) of the tunnel T is laid and supported on the beam 6 through the intermediary of jacks 7a, 7b. Left and right forming devices 3, 3 are movably set on opposite end parts of guide rail 4. The beam 6 is extended forward from the bogie 1 so as to lay the guide rail 4 along the wall surface (t) of the tunnel, and thereafter, fastcurable concrete is placed between the form devices 3, 3 and the tunnel wall surface (t) while the form devices 3, 3 are moved so as to a concrete covering part having a predetermined width is formed at the wall surface (t). Further, blasting holes are formed in the working face of the tunnel T with the use of several blast hole drilling devices 5 set on the bogies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel lining apparatus for constructing a tunnel lining having a predetermined thickness by placing quick-setting concrete on an excavated tunnel wall surface.

[0002]

2. Description of the Related Art Conventionally, when a tunnel is dug into the ground such as rock, a blast hole is drilled in the face of the rock, the blast hole is filled with explosive, and then blasted. After draining the sludge, a concrete lining is constructed on the tunnel wall. As this concrete lining, when excavating a tunnel in expansive or collapsible ground, it is necessary to immediately apply a primary lining to the tunnel wall surface immediately after the excavation. A concrete spraying method is used in which compressed air is sprayed onto the wall surface of the tunnel to rapidly harden the concrete.

[0003]

However, according to the concrete spraying method, concrete is sprayed onto the wall surface of the tunnel at a high speed, so that the concrete does not adhere sufficiently and rebounds to cause a bad working environment. In addition, there is a possibility that the sprayed concrete may separate from the wall surface of the tunnel, resulting in loss of material. further,
Such concrete spraying work can be performed only after waiting for completion of the work of discharging the offset and the work of forming the blast hole, and after the sprayed concrete has hardened to a certain degree, the concrete is sprayed again on the surface. Without spraying, concrete lining with a required thickness cannot be constructed, and there is a problem that the work efficiency of tunnel lining is significantly reduced.

On the other hand, in the case of performing tunnel lining with a form instead of shotcrete, it can be done only after completion of the blast hole drilling work,
It is inevitable that work efficiency will decline. The present invention has been made in view of the above problems, and it is possible to efficiently perform concrete lining work on an excavated tunnel wall surface, and to blast the face face to be excavated next, overlapping with the lining work. An object of the present invention is to provide a tunnel lining device that enables a hole drilling operation and the like.

[0005]

In order to achieve the above object, the tunnel lining device of the present invention has a movable carriage disposed in a tunnel, and projects forward from the movable carriage on the movable carriage. A movable support girder member is provided, and a pair of front and rear guide rails having a shape along the tunnel wall surface are mounted on the support girder member via jacks, and the front and rear guides are provided on both sides of the front and rear guide rails. A left-right moving formwork device which is guided between the rails and moves in the circumferential direction of the tunnel wall surface is provided, and further, a nozzle portion is made to face the moving formwork device between the moving formwork device and the tunnel wall surface. It has a structure in which a quick-setting concrete pouring pipe is detachably attached. The invention described in claim 2 is characterized in that a blast hole punching device that is movable in the tunnel length direction is provided at several locations on the movable carriage.

[0006]

[Operation] After detonating the explosive charged in the blast hole and excavating the tunnel portion of an appropriate length, the moving carriage is moved forward,
First, blast holes are drilled at a plurality of locations on the outer peripheral portion of the tunnel face by a drilling device. After that, the supporting girder member is projected forward from the moving carriage and the front and rear guide rails mounted on the supporting girder member are moved to the position of the excavated tunnel wall surface, and the jack is operated to keep the distance from the tunnel wall surface. Adjust to the specified dimensions. Next, while pouring quick-setting concrete from the nozzle part of the pipe between the formwork device and the tunnel wall surface, move these formwork devices upward from both lower ends of the guide rails to form a concrete lining. To go. Simultaneously with the construction of the tunnel lining, a blasting hole can be formed in the face of the face other than the outer face of the face by using the space surrounded by the guide rails.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to the drawings, an embodiment of the present invention will be described. In FIG. 1 and FIG.
Rails 2 and 2 are laid on both sides of the bottom of the rail.
A movable carriage 1 is movably disposed on the movable carriage 2, and a pair of front and rear guide rails 4 and 4 provided with left and right formwork devices 3 on the movable carriage 1 and a plurality of blast hole punching devices 5. It is arranged to be movable back and forth in the tunnel length direction.

The movable carriage 1 is formed in a front gate shape, and support girder members 6, 6 having a certain length can be protruded from the front end of the upper end frame 1a on both sides of the upper end frame 1a. Are arranged so as to be movable in the tunnel length direction, and a pair of left and right jacks are provided on the front portions of these movable support girder members 6, 6 at the same intervals as the front and rear guide rails 4, 4.
The lower ends of 7a and 7b are pivotally supported, and the rod ends of these jacks 7a and 7b are connected to the inner peripheral surfaces of the curved portions of the front and rear guide rails 4 and 4 to connect the guide rails 4 and 4 to the tunnel wall surface t. It is mounted and supported so that it can be moved in and out freely.

The guide rails 4 and 4 are made of I-shaped steel, and a rack 8 is formed on the inner peripheral surface of the guide rail 4 along the entire length thereof as shown in FIG. Further, these guide rails 4 and 4 are curved guide rail portions 4a along the upper half curved surface of the tunnel wall surface t.
And a vertical guide rail portion 4b (see FIG. 8) along the lower half vertical surface of the tunnel wall t, and the vertical guide rail portion 4b is disconnected from the lower end of the curved guide rail portion 4a during movement. The movable carriage 1 is housed in a proper place and the curved guide rail portion 4a is supported by the jacks 7a and 7b.

As shown in FIGS. 10 and 11, the formwork apparatus 3 has rollers 32 and 33 rotatable between upper and lower end portions of front and rear side plates 31 and 31 along opposing inner surfaces of guide rails 4 and 4, respectively. On shaft support 34
Then, an endless formwork belt 35 is circulated between these rollers 32 and 33 in a circulating manner, and a central shaft 34 of the rollers 32 and 33 is provided.
The guide rollers 36, 36 are integrally fixed to both ends of the guide roller 36, 36, and these guide rollers 36, 36 are rotatably fitted in and locked in the opposed grooves 4c, 4c of the guide rails 4, 4, respectively. 3 is supported between the guide rails 4 and 4 in a erected state. In addition, it is desirable that the form frame belt 35 is configured to be positively pressed from the inner surface side thereof to the concrete pouring side by an appropriate pressing means.

Further, the rotary shaft 38 is pivotally supported between the upper end portions of the front and rear side plates 31, 31 of the formwork apparatus 3, and the racks of the guide rails 4, 4 are attached to the ends of the rotary shaft 38 protruding from the side plate 11. The pinion 39 meshed with 8 is fixed. The reference numeral 9 designates a motor for rotating the rotary shaft 38, which is arranged at a suitable position between the both side plates 31, 31. Reference numeral 10 is a pipe for placing concrete between the formwork belt 35 of the formwork device 3 and the tunnel wall surface t, and the opening end of the nozzle 11 is arranged from the upper end side of the formwork belt 35 to the tunnel wall surface t and the formwork device. It is provided so as to face between the upper ends facing 3 and is movable in the longitudinal direction of the tunnel with respect to the formwork device 3.

As this moving means, guide rods 12, 12 are installed between both side plates 31, 31 on the rear side of the form belt of the form device 3,
A mounting member 14 to which the lower end of the reciprocating member 13 is fixed is slidably attached to the guide rods 12, 12, and the nozzle portion 11 of the pipe 10 is detachably inserted and supported at the tip of the reciprocating member 13. The supporting body 15 is rotatably supported by a shaft 16. 17
Is a gable form part made up of alternating layers of a rubber tube and sponge, which is mounted on the outer peripheral surface of the guide rail 4 on the front side (cut face side) over the entire length, and supplies compressed air into the gable form part 17. It is configured to be brought into pressure contact with the inner peripheral surface of the tunnel wall surface t by being expanded.

On the other hand, the blast hole punching device 5 is arranged on both sides of the undercarriage 1a of the moving carriage 1 and on both lower sides thereof so as to be movable back and forth in the tunnel length direction. Punching device 5
As means for moving the carriage in this way, the beam receiving members which are provided on both sides of the underframe 1a of the moving carriage 1 between the guide rail supporting girder members 6, 6 and on the lower portions on both sides of the moving carriage 1.
A pair of left and right parallel rails 19 and 19 are laid on and above the parallel plate 18, and a base plate 20 is placed on these parallel rails 19 and 19 so as to be movable back and forth by an appropriate drive mechanism (not shown). The punching device 5 is installed on the front part of the.

The punching device 5 is a fixed base fixed on the base plate 20.
The front end of the arm member 52 is connected to the front surface of the arm member 51 so as to be vertically and horizontally rotatable, and the perforation tool 53 is attached to the tip end side of the arm member 52. The perforation tool 53 is the rear end of the pedestal plate 54. Is pivoted to the tip of the arm member 52, and the intermediate portion and the tip of the arm member 52 are vertically rotatably connected via a jack 55. It is configured to be rotated by a drive mechanism such as a motor provided in the above and movable in the front-rear direction. Reference numeral 57 is an arm rotating jack that connects the intermediate portion of the arm member 52 and the receiving plate 54.

In order to construct the concrete lining C on the tunnel wall surface t by using the apparatus constructed as described above, the movable carriage 1 is retracted into the tunnel T when the tunnel face is excavated by blasting, As shown in FIG. 3, after the tunnel portion of a predetermined length is excavated by loading and blasting explosives into the blast hole 21 formed in the face face, the movable carriage 1 is moved forward and the piercing device 5 is moved. Punch tool by advancing the base plate 20
Bring the drill 56 of 53 close to the face. Then, first, by operating the jacks 55, 57, etc., the perforating tool 53 is moved to the outer peripheral face of the face, and as shown in FIGS. 5 and 6, a plurality of blast holes are formed on the outer peripheral face of the face by a drill 56 at predetermined intervals. Drill 21. During the drilling work of the blast hole 21, the excavated shear is discharged. It should be noted that the displacement can be discharged in the space below the movable carriage 1 even after the blast hole 21 is formed.

After the blast hole 21 is formed, the perforation tool 53 is pivotally moved from the outer peripheral portion of the face to the central part of the tunnel, and the outer peripheral portion of the face where the blast hole 21 is formed and the front end face of the tunnel lining C that has already been constructed. A space in which the guide rails 4 and 4 of the formwork device 3 can be placed is provided therebetween. Next, as shown in FIG. 7, the front half of the support girder member 6 on the underframe 1a of the moving carriage 1 is advanced and projected from the moving carriage 1 to a position near the tunnel facet.

After that, the rods of the jacks 7a and 7b are appropriately extended so that the front and rear curved guide rail portions 4a,
4a is brought closer to the excavated tunnel wall surface t side, and the outer peripheral surface of the rear guide rail portion 4a is brought into close contact with the inner peripheral surface of the front end of the concrete lining C which has already been constructed. After that, the upper ends of the vertical guide rails 4b and 4b are connected and integrated with the lower ends of the front and rear curved guide rails 4a and 4a as shown in FIG. 8, and the lower ends of these guide rails 4b and 4b are connected to the tunnel T.
Fix it on both edges of the bottom of the.

Next, as shown in FIG. 9, the left and right formwork devices 3 and 3 arranged at both end portions of the curved guide rail portion 4a are moved to the lower ends of the vertical guide rails 4b and 4b, respectively. Release the connection between the jacks 7a, 7b and the guide rails 4, 4 and further inflate the end form frame portion 17 provided on the outer peripheral surface of the front guide rail 4 formed by the connection of these curved and vertical guide rail portions. The wall surface C of the tunnel. In this state, the front and rear end surfaces of the space portion between the formwork device 3 and the tunnel wall surface t where the concrete should be placed are formed by the front end face of the concrete lining C already constructed and the gable formwork portion 17. Regulated. In addition, jack 9a,
The support by 9b is released by moving the formwork devices 3 and 3 in parallel with the work of placing concrete and the drilling device 5
This is to prevent the vibration from being transmitted from the moving carriage 1 to the guide rails 4 and 4 when performing the work of forming the blast hole in the face face.

In this state, concrete is fed into the pipe 10 from the concrete supply source installed at a proper place in the tunnel, and the mist is supplied from the compressed air supply pipe 25 and the concrete quick-setting agent supply pipe 26 attached to the tip of the pipe 10. -Like concrete quick-setting admixture is supplied and mixed with the concrete by air flow until it reaches the nozzle part 11, and then, as shown in FIGS.
As shown in FIG. 5, the nozzle portion 11 ejects and drives between the form frame belts 35 of the respective form frame devices 3 and the tunnel wall surface t.
At this time, the reciprocating member 13 to which the nozzle portion 11 is attached is attached to the guide rod.
The reciprocating movement along 12 and the reciprocating rotation of the nozzle portion 11 in a swinging state make the height of the space between the formwork device 3 and the tunnel wall surface t uniform so that the concrete mixed with the quick-setting admixture. Place 22.

Further, as the poured concrete 22 begins to harden, the pinions 39 meshing with the racks 8 of the guide rails 4 and 4 are rotated to gradually move the left and right formwork units 3 and 3 into guide rails. Ascend along 4 and 4 to construct tunnel lining C. At this time, since the form frame belt 35 of the form device 3 is rotatably stretched between the rollers 32 and 33, the form device 3 is made to run on the already placed tunnel lining surface. It moves and maintains the smoothness of the tunnel lining surface. During the construction of this tunnel lining C, as shown in FIG. 7, the perforating tool 53 is moved to the center of the face, and the face of the face surrounded by the blast holes 21 formed in the outer periphery of the face is drilled by a drill 56. As shown in FIG. 12 and FIG. 13, blast holes 21 are drilled vertically and horizontally at predetermined intervals.

On the other hand, while the concrete 22 mixed with the quick-setting admixture is being poured, the formwork units 3 and 3 are gradually lifted up, and these formwork units 3 and 3 are, as shown in FIG. When reaching the vicinity, the moving speed of one formwork device 3 is made higher than that of the other formwork device 3, and the tunnel wall surface t
It is moved until its tip reaches the top end of (1), concrete 22 is sufficiently placed in the one mold device 3, and then the pipe 10 having the nozzle portion 11 is removed together with the reciprocating member 13.

Subsequently, the other formwork device 3 is connected to the formwork device 3
Between the nozzle part 11 and the tunnel wall t
While driving 22 while moving toward the top of the tunnel wall surface t, when the nozzle portion 11 becomes a hindrance to the movement, the nozzle 11 is removed in the same manner as above, and both of the formwork devices 3 and 3 are removed. The tips are joined to each other to maintain the docked state with bolts or the like as needed, and the outside of the mold frame unit 17 and the top of the tunnel wall surface t as shown in FIG. Concrete containing a quick-setting agent is poured and filled into the space remaining between the ends through an appropriate injection nozzle 23.

Thus, an arch-shaped tunnel lining C having a width corresponding to the length between the front and rear guide rails 4 and 4 is formed in the length direction of the tunnel T, and after the concrete at the top end is hardened, the jacks 7a and 7b are used. The curved guide rail portion 4a of the guide rail 4 is supported, and then the vertical guide rail portion 4b of the guide rail 4 is removed, and the supporting girder member 6 is moved rearward so that the curved guide rail portion 4a is retracted onto the carriage 7. At the same time, each blast hole punching device 5 is also returned to its original position.

Next, after the explosive is loaded into the blast hole 21 formed by the perforation tool 53 to explode, a tunnel portion having a predetermined length is excavated on the face of the face, and then the movable carriage 1 is advanced to make the face like the face. Drilling work and blasting work of the blast hole 21 on the outer peripheral portion, construction work of the tunnel lining C by the movable formwork device 3 after the drilling work, and drilling of the blast hole 21 to the central portion of the face in parallel with this work. By continuously repeating the installation work, a continuous lining C is constructed on the tunnel wall surface t.

[0025]

As described above, according to the tunnel lining device of the present invention, the movable carriage is disposed in the tunnel, and the support girder member which is movable on the movable carriage so as to project forward from the movable carriage. And a pair of front and rear guide rails having a shape along the tunnel wall surface are mounted on the support girder member via jacks, and are guided between the front and rear guide rails on both sides of the front and rear guide rails. A quick-setting concrete pouring system in which a left and right moving formwork device that moves in the circumferential direction of the tunnel wall surface is arranged, and the nozzle part is faced between the moving formwork device and the tunnel wall surface. Since the piping for use is detachably mounted, the supporting girder member is projected from the moving carriage to the wall surface side of the excavated tunnel to move the guide rail to the cutting face side. Work in While it is possible to take a wide, therefore,
It is capable of smoothly and efficiently discharging work such as shear, and moreover, the position of the guide rail with respect to the tunnel wall surface can be accurately adjusted by the jack, and the movable formwork device and the tunnel wall surface arranged on the guide rail. The thickness of the tunnel lining can be set to a desired dimension depending on the interval.

Further, since the guide rails are provided with movable formwork devices on both sides thereof, the movable formwork devices and the tunnel wall surface are moved while moving these movable formwork devices from the lower end portions on both sides of the guide rail respectively. By placing quick-setting concrete through the nozzle between the and, it is possible to continuously construct a tunnel lining part with a constant width and a constant thickness on the tunnel wall in the circumferential direction. In the above, it is possible to place the quick-setting concrete in a state where both formwork devices are connected, and it is possible to form a series of tunnel linings that do not cause peeling or falling.

By disposing blast hole punching devices at several positions of the movable carriage so as to be movable in the length direction of the tunnel, first, the blast hole punching device is provided on the outer peripheral portion of the tunnel face excavated by blasting. After drilling a plurality of blast holes by the device, the guide rails are placed on the tunnel wall as described above and the tunnel lining work is performed by the piercing device while the tunnel lining work is performed by the moving form device. It is possible to perform drilling work, so immediately after the tunnel lining, tunnel digging by the next blasting becomes possible, from the digging of the tunnel part of a predetermined length to the start of the tunnel lining work by the formwork device. The work process of can be significantly shortened and the tunnel construction period can be greatly shortened by performing the work of discharging excavated skids during the work of forming blast holes on the outer peripheral face of the face. It is what it is.

[Brief description of drawings]

FIG. 1 is a simplified side view of the entire apparatus,

FIG. 2 is a rear view thereof,

FIG. 3 is a simplified cross-sectional view showing a state in which a blast hole is formed in a face.

FIG. 4 is a sectional view of a tunnel portion excavated by blasting,

FIG. 5 is a simplified vertical sectional side view showing a state in which a blast hole is formed in the outer peripheral portion of the face.

FIG. 6 is a front view of a face face having a blast hole formed therein.

FIG. 7 is a side view showing a state where the guide rail is advanced,

FIG. 8 is a rear view showing a state in which the vertical guide rail portions are connected,

FIG. 9 is a rear view when the tunnel lining starts,

FIG. 10 is a perspective view showing a state in which a tunnel lining is being constructed,

FIG. 11 is a front view thereof,

FIG. 12 is a simplified side view showing a state in which a blast hole is formed together with a tunnel lining,

FIG. 13 is a simplified front view of FIG.

FIG. 14 is a simplified front view showing a state in which lining has been performed up to the vicinity of the top of the tunnel.

FIG. 15 is a simplified front view showing a state in which the top of the tunnel is lined.

[Explanation of symbols]

 1 Mobile bogie 3 Formwork device 4 Guide rail 5 Blast hole drilling device 6 Support girder members 7a, 7b Jack 11 Nozzle part 21 Blast hole 22 Concrete with admixture t Tunnel wall surface

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shoji Kinoshita 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka City Okumura-gumi Co., Ltd. (72) Inventor Toshiyuki Kodama 2-2-2, Matsuzaki-cho, Abeno-ku, Osaka Stock company Okumura Gumi

Claims (2)

[Claims] 1. A movable carriage is provided in a tunnel, a support girder member is provided on the movable carriage so as to project forward from the movable carriage, and the support girder member is provided along the tunnel wall surface. A pair of front and rear guide rails each having a shape are mounted via jacks, and a left and right moving formwork device which is guided between the front and rear guide rails and moves in the circumferential direction of the tunnel wall is arranged on both sides of the front and rear guide rails. In addition, a quick-setting concrete placing pipe having a nozzle portion facing the movable form device and the tunnel wall surface is detachably attached to the movable form device. Tunnel lining equipment. 2. The tunnel lining device according to claim 1, further comprising blast hole punching devices that are movable in the tunnel length direction at several locations on the movable carriage.