JP2709876B2 - Tunnel wall construction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel wall construction apparatus for spraying concrete on a tunnel excavation wall or performing a net tensioning operation.

[0002]

2. Description of the Related Art Conventionally, when a tunnel is excavated in the ground such as a bedrock, a blasting hole is drilled in a face portion, an explosive is charged in the blasting hole, and the blasting is performed. After discharging, concrete spraying work on the wall surface and netting work are performed.

[0003]

However, since the work space in the tunnel is narrow, the above-mentioned tunnel wall construction work cannot be performed in duplicate, and it is necessary to wait until the work for discharging the shear is completed. At present, wall construction work such as concrete spraying work on the wall surface and net stretching work are performed in the order of processes, and there is a problem that the work efficiency of tunnel construction is reduced. The present invention has been made in view of such a problem, and a tunnel wall construction apparatus capable of performing a wall construction work such as a concrete spraying work on a wall surface or a net tensioning work at the same time as a discharge work of a shear is provided. It is intended to be provided.

[0004]

To achieve the above object, according to the Invention The tunnel wall construction system of the present invention, the tunnel boring wall
On the upper wall of the surface at appropriate intervals in the tunnel length direction
And a roller was supported at the lower end of these anchors.
Fix the hook and support the roller in the tunnel length direction
A structure in which a rail is moved and a trolley is supported on the support rail so as to be able to travel in the tunnel length direction, and the trolley is equipped with tunnel wall construction equipment such as a nozzle for concrete spraying. It is. In addition, as the tunnel wall construction equipment, as described in claim 2 , an upper trolley and a lower trolley are individually movably disposed on the support rail, and a concrete spray nozzle is provided on the upper trolley. And a structure in which an operator boarding cage is arranged on the lower carriage.

[0005]

When the blast of the tunnel face is blasted, the bogie disposed on the support rail so as to run freely is kept behind the tunnel, and when the blast is completed, the bogie is advanced to the face and is mounted on the bogie. Operate wall construction equipment such as spray nozzles to spray concrete on the excavated wall. At this time, a predetermined work is performed on the excavated wall while moving the bogie equipped with the wall construction equipment in the length direction of the tunnel in the upper part of the tunnel, and in parallel with the construction, the waste is discharged in the space below the tunnel. Work.

[0006] Furthermore, the upper wall of the tunnel excavation wall is
Cars are installed at appropriate intervals along the length of the tunnel, and
That is supported by a hook fixed to the lower end of the
Move the support rail above the roller in the tunnel length direction.
It is configured to excavate a fixed length tunnel.
A new anchor on the face side, and the roller on the rear side
Replace the hook that supports the bottom with the lower end of the anchor
This allows the entire device to be quickly moved in the length of the tunnel.
Can be moved, and work efficiency is further improved.
is there. In addition, the upper trolley and the lower trolley are individually movably disposed on the support rail, and the concrete spraying nozzle is provided on the upper trolley, while the lower trolley is provided with an operator boarding cage and a driving device therefor. By setting it up,
While the cage is moved along the excavated surface of the tunnel, the net tension work by the operator can be performed smoothly.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Reference numeral 1 denotes a pair of left and right support rails disposed along the vicinity of the upper wall on the rear side of the cutting surface A in the tunnel T, and is made of an I-shaped steel having a fixed length. Anchors 2 are erected at regular intervals in the tunnel length direction, and an upper hook 3 having an inverted U-shaped cross section is detachably fixed to the lower end of each anchor 2 toward the tunnel length direction. As shown in FIG. 4, the left and right rollers 4 are rotatably supported on both sides of the support rail 1, and the support rail 1 is inserted into upper hooks 3, 3,... Arranged in the length direction of the tunnel. The rail 1 is placed on the rollers 4 and 4 in the hook 3.
The upper flange portion is supported to be movable in the tunnel length direction.

The anchor 2 has its upper portion driven into the ground to be supported on the ground. An intermediate fixing member 5 having a T-shaped cross section is fixed to the lower end of the anchor 2. The upper end of the upper hook 3 is detachably fixed by bolts and nuts 6.

Reference numerals 7 and 7 denote a pair of left and right upper guide rails having a substantially U-shaped cross-section and provided on the lower side between the support rails 1 and 1 at substantially the same intervals as the left and right support rails 1 and 1. A pair of right and left lower guide rails 8, 8 are arranged side by side in a superposed state below the guide rails 7, 7, and a length is provided on the outer surface of the upper and lower guide rails 7, 8. The side frame members 9, 9 are integrally fixed at appropriate intervals in the direction, and the joint material 10 is provided between the upper and lower guide rails 7, 8 between the opposing surfaces of the center portions of the side frame members 9, 9 in a horizontal direction. And the left and right guide rails are maintained at a fixed interval.

A lower hook 11 having a U-shaped cross section is integrally provided on the upper ends of both side frame members 9 and 9 so as to face below the upper hook 3 and the support rail 1 is provided on an opposing surface in the hook 11. Rollers 12 and 12 rotatably supported on the lower flange are rotatably supported, and both side frame members 9 and 9 are suspended from the support rail 1 with the upper and lower guide rails 7 and 8 integrally with the support rail 1. It is configured to be movable in the tunnel length direction.

Reference numeral 13 denotes an upper bogie disposed between the upper left and right guide rails 7, 7; and 14, a lower bogie disposed between the lower left and right guide rails 8, 8. These upper and lower bogies 13, 14 are provided.
Wheels 15 and 16 are rotatably supported on both sides of the
The upper and lower carriages 13 and 14 can be independently moved along the upper and lower guide rails 7 and 8, respectively. The traveling drive mechanism of the upper trolley 13 is installed in a machine 17 installed on the trolley 13,
The traveling drive mechanism of the lower carriage 14 is provided in a machine box 18 mounted on the lower surface of the carriage 14.

Reference numeral 19 denotes a spraying arm which is configured to be extendable and contractible in the longitudinal direction by hydraulic operation. A spraying nozzle 20 is attached to a tip of the spraying arm 20 in a direction perpendicular to the arm 19, and a base end is a casing. 17 is connected to a rotating shaft 21 projecting obliquely downward at an appropriate angle from the front end. This tilt rotation axis
21 is connected to an arm rotation motor (not shown) installed in the machine box 17, and the base end of the spraying arm 19 is inserted between a pair of left and right brackets 22, 22 fixed to the rotation shaft 21. And, it is pivotally supported by a shaft 23 erected between the brackets 22, 22 so as to be vertically rotatable. Hydraulic jacks 24, 24 are connected to the ends of the brackets 22, 22, and the rods of these jacks 24, 24 are pivotally attached to appropriate positions on both side surfaces of the arm 19 via the bracket pieces 25, 25, so that the jack 24 , 24 actuate the arm 19 up and down with the shaft 23 as a fulcrum.
An appropriate mechanism other than the above may be used as the vertical moving means and the rotating means of the spray nozzle 20, and the spray nozzle 20 does not necessarily need to be configured to be able to expand and contract.

Reference numeral 26 denotes a flexible hose connected to the spray nozzle 20 for supplying ready-mixed concrete having fluidity to the nozzle 20, and a concrete supply unit (not shown) disposed at an appropriate position in the tunnel T. It is connected to and communicated with. 27 is a trolley
This is a hydraulic unit installed at the rear of 13 and supplies pressure oil to various parts such as motors and jacks.

Reference numeral 28 denotes a mancage arm which is disposed on the lower surface side of the lower carriage 14 so as to be pivotable and vertically movable. The pivoting and vertical movement mechanism of the arm 28 is configured such that the vertical rotating shaft 30 is rotatably supported by the machine 18 fixed to the lower surface of the lower carriage 14 and the rotating shaft 30 is provided in the machine 18. The driving mechanism (not shown) is used to rotate the rotation shaft 30, and the base end of an arm 28 is pivotally attached to the rotation shaft 30 so as to be vertically movable.
The rod ends of jacks 31, 31 whose base ends are pivotally connected to the upper and lower portions are connected to the upper and lower portions of the arm 28, and the arm 28 is moved up and down by the operation of the jacks 31, 31.
37 is a man cage mounted on the mounting base 29.

The arm 28 has a length that can be extended and contracted similarly to the spray arm 19 described above. The mancage mount 29 is configured to be turned up and down with respect to the arm 28 by the operation of a jack 32 connected between the lower surface thereof and the tip of the arm 28. Reference numeral 33 denotes a unit stand provided at the rear of the lower carriage 14, on which a mancage drive unit 34 is installed. Reference numeral 35 denotes a fixing leg whose base end is pivotally mounted on the side frame member 9 of the upper and lower guide rails 7 and 8 so as to be vertically rotatable, and a rod end of a jack 36 pivotally mounted on a lower portion of the side frame member 9. Is connected to the fixing leg 35 and is moved up and down by the operation of the jack 36. The length of the fixing leg 35 may also be configured to be adjustable in length.

The operation of the thus constructed tunnel wall construction apparatus will be described. When the face A is blasted by blasting, the support rail 1 is retracted along the rollers 4 and suspended from the support rail 1. The frame members 9 on both sides of the supported upper and lower guide rails 7 and 8 are retracted along the support rail 1,
Further, the upper and lower carriages 13, 14 are also retracted using the upper and lower guide rails 7, 8 as guides.

When the face A is blasted by blasting, the support rail 1 and the upper and lower guide rails 7 and 8 are moved forward to the face side and the upper carriage is moved along the upper guide rail 7.
13 is advanced and the spraying arm projecting from the carriage 13
Spray nozzle 20 by bringing 19 close to the blasted rock excavation wall
While the concrete is sprayed on the wall surface, the excavation waste generated by the blast is discharged in the space below the spray nozzle 20. After the guide rails 7, 8 have been advanced by a predetermined length, the jacks 36 are operated to apply the tips of the fixing legs 35, 35 to both sides of the upper peripheral portion of the tunnel lining C, which has already been sprayed. The upper and lower guide rails 7 and 8 are fixed at that position.

The spraying arm 19 is extendable and retractable, and can be turned and moved up and down in the circumferential direction by the operation of the inclined rotation shaft 21 and the jack 24. Therefore, by operating the arm 19, the spraying nozzle 20 is moved. While facing the excavation wall surface of the tunnel, the concrete can be sprayed back and forth and circumferentially along the wall surface. The spray nozzle 20 is mounted rotatably about the axis of the arm 19.

On the other hand, the lower carriage 14 is advanced along the lower guide rail 8, and a man cage on a mounting table provided at a tip end of a man cage arm 28 extending from the lower surface side of the carriage 14 toward the face A. An operator enters the 37 and causes the man cage arm 28 to perform operations such as expansion and contraction, turning, and vertical movement, thereby moving the man cage 37 along the excavation wall surface and performing a net tensioning operation or the like. This net tensioning operation and the like can be performed in parallel with the above-described shear discharge operation.

As described above, the construction work of the wall, such as the work of putting the net on the wall surface and the work of spraying the concrete, is performed by using the upper space in the tunnel, and the work is completed. Again, the face is excavated by blasting or the like, and the wall construction equipment is advanced to perform wall construction in parallel with the discharge of the shear, and this operation is repeated to excavate the tunnel T.

In addition, it is necessary to move the support rail 1 along the upper wall surface of the tunnel toward the face A as the tunnel T is excavated. The upper hook 3 on the rear side where the part has passed can be removed from the anchor 2, a new anchor can be driven into the upper wall surface of the tunnel T on the front side of the support rail 1, and the upper hook 3 can be attached to the anchor.

In the above embodiment, the upper and lower trucks 13 and 14 movably arranged in the length direction of the tunnel in the space above the tunnel T are provided with concrete spraying equipment and net tensioning equipment. However, the present invention is not limited to this, and for example, arranging a wall construction facility such as a facility for performing piping work in a space above the tunnel or a work frame having a shape along the inner peripheral surface of the tunnel. You may keep it.

[0023]

As described above, according to the tunnel wall construction apparatus of the present invention, the support rail is disposed on the upper wall surface of the tunnel excavation wall in the tunnel length direction, and the bogie is mounted on the support rail in the tunnel length direction. The truck is supported so that it can run freely, and the bogie is equipped with a tunnel wall construction facility such as a nozzle for concrete spraying. This can be performed simultaneously with the work of discharging the shear generated by excavation, and the tunnel construction work can be performed efficiently.

Further, the upper wall of the tunnel excavation wall is
Cars are installed at appropriate intervals along the length of the tunnel, and
That is supported by a hook fixed to the lower end of the
Move the support rail above the roller in the tunnel length direction.
It is configured to excavate a fixed length tunnel.
A new anchor on the face side, and the roller on the rear side
Replace the hook that supports the bottom with the lower end of the anchor
The platform on which the tunnel wall construction equipment is mounted
The car must be moved along the length of the tunnel with the support rails.
Therefore, concrete spraying work etc.
Construction work immediately after drilling
The rate is further improved. Also on the support rail
The unit trolley and the lower trolley are individually movably arranged,
Install the concrete spray nozzle on the upper bogie
On the lower trolley, a worker's cage and its drive
The cage to the tunnel excavation surface
Net tension work by workers while moving along the circle
It can be done smoothly.

[Brief description of the drawings]

FIG. 1 is a simplified longitudinal side view showing a wall construction state,

FIG. 2 is a simplified front view thereof,

FIG. 3 is a simplified plan view thereof,

FIG. 4 is a vertical sectional front view of a suspended upper and lower carriage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support rail 2 Anchor 3 Upper hook 4 Roller 7 Upper guide rail 8 Lower guide rail 13 Upper trolley 14 Lower trolley 19 Spraying arm 20 Spray nozzle 28 Mancage arm 37 Mancage

Continued on the front page (72) Inventor Hideaki Akutsu 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi In Okumura Gumi Co., Ltd. (72) Inventor Yasutoshi Hagiwara 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi (72) Inventor Toyoshi Noma 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Inside Okumura Gumi Co., Ltd. (72) Inventor Yutaka Miura 2-1-1, Nihonbashi-Muromachi, Chuo-ku, Tokyo Inside Mitsui Miike Seisakusho (72) ) Inventor Hironari Kondo 3-3-11 Nihonbashi Honishi-cho, Chuo-ku, Tokyo Miike Kiki Co., Ltd. (56) References JP-A-54-125836 (JP, A)

Claims (2)

(57) [Claims] 1. A tunnel length is provided on an upper wall surface of a tunnel excavation wall surface.
Anchors at appropriate intervals in the vertical direction, and
Attach the hook that supports the roller to the lower end of the car,
The support rails along the length of the tunnel
This support rail bogie is traveling freely supported on the tunnel longitudinal direction, the tunnel wall construction system, characterized in that is equipped with a tunnel wall construction equipment such as a nozzle for concrete spraying in該台vehicle while the. 2. An upper trolley and a lower trolley are individually movably disposed on the support rail, a concrete spray nozzle is provided on the upper trolley, and an operator boarding cage is disposed on the lower trolley. The tunnel wall construction apparatus according to claim 1, wherein: