JPH0465959B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] Construction method and device thereof This invention relates to a construction method for lining a tunnel with a PC lining board and its device.

"Prior Art" Applicants previously installed four arc-shaped PCs between the upper ends of the left and right side wall concrete, which were fixed to the tunnel side walls.
The boards are assembled in an arch shape along the ground, and the lower ends of the PC boards located on the left and right side walls of the arch are fixed to the side wall concrete, and the upper ends are fixed to the ground via anchors to form a crown of the arch. By joining the side wall PC boards with pin joints between the side wall PC boards, problems such as imperfections in the formwork and poured concrete caused by pouring concrete as a secondary lining can be solved and ensure safety. This is a highly reliable tunnel lining method that allows for the construction of stable tunnels, enlarges the tunnel's internal cross-section, and reduces the excavation cross-section, and also allows for easy decoration of the tunnel's inner surface, with excellent workability and economic efficiency. However, due to the need to perform lining construction at the same time as excavation construction,
There was a difficult problem to be solved as to how to rationally and efficiently erect four lining boards in different directions within a narrow work space while still allowing vehicles to pass through.

"Means for Solving Problems" In order to solve the above-mentioned conventional problems, the present invention has the following features:
By installing a lining plate construction mechanism on a gate-shaped movable frame that can run along the rails in the direction of the tunnel and allow vehicles to pass underneath, it is possible to transport and transport equipment and debris required for excavation work. In addition to allowing vehicles and other vehicles to pass freely, the top support for installing the top lining board and the lower support for installing the side lining board can be folded up and down compactly onto a movable frame. This paper proposes a construction method and device that makes it possible to easily move a movable trestle through a tunnel.

Furthermore, the base end of the upper support is pivoted to the left and right of the lifting support frame which is installed in the center of the movable frame so as to be able to rise and fall freely, and the angle can be adjusted freely around the horizontal axis. The lower support frame is configured to hold the plate and raise the elevating support frame, and in the raised position, the tip is tilted diagonally downward, and after the upper support is raised, the lower support frame holds the side lining plate below. By configuring the body to move horizontally to the side of the movable frame and lower the tip diagonally downward, it is possible to move the side lining plate together with the lower support in a narrow work space after the upper support has been raised. The present invention proposes a construction method and device that makes it possible to efficiently erect a lining board on the side of a tunnel by easily joining and integrating it with the lining board for the crown end.

``Embodiment'' Below, an embodiment of the present invention shown in the drawings will be described.The movable frame 1 is configured in the form of a gate supported by left and right columns 1a, and various vehicles can pass below it. Rail 2 laid in the tunnel by running vehicle 1b installed at the lower end of 1a
The vehicle is configured to be driven while traveling on the vehicle.

A vertical guide 3 is installed at the rear center of the movable frame 1, and an elevating frame 4 is supported on the rear side of the vertical guide 3 so as to be movable up and down by an elevating cylinder 5. A body 6 is attached.

A support part 6' is provided at the center of the support body 6 and projects upward, and the base ends of a pair of left and right upper support bodies 7, 7 are pivoted to the tip of the support part 6' so as to be rotatable in the vertical direction by a horizontal shaft 8. furthermore, the lower surface of the upper supports 7, 7 and the support 6 in front of the horizontal shaft 8.
A cylinder 9 is pivotally mounted between the side surfaces of the cylinder 9, so that the upper supports 7, 7 can be adjusted and held at a desired angle in the vertical direction.

At the front and back of the middle part of the left and right upper supports 7, there is a support part 1 on which an arc-shaped PC lining plate A for the top end is placed and supported.
0 and a clamp portion 11 are provided, and a positioning arm 12 is rotatably pivoted to a horizontal shaft 13 on the lower surface of the tip, and can be rotated approximately 180 degrees by rotating the horizontal shaft 13 with a hydraulic motor or the like. It's becoming like that.

A pair of hook-shaped clamp claws 14 and 14' are provided on the front and rear of the clamp portion 11 to protrude so as to rotate and move up and down, and the front clamp claw 14 is moved forward and backward in the width direction of the upper support body 7 by an axial feed cylinder. freely,
Moreover, it is provided in a protruding manner so as to be able to rise and fall freely, and is configured to surround the front and rear of the PC lining plate A for the top end.

A lower support 15 is installed on the movable frame 1 below the upper support 7.

That is, on the rear part of the movable frame 1, a rail 16 is laid in both directions from the center, and a trolley 18 is driven and runs on the rail 16 by a motor 17 or a cylinder.
is installed, and the middle part of the lower support body 15 is pivotally attached to the distal end thereof by a horizontal shaft 19 so as to be freely rotatable in the vertical direction.

The lower support 15 has wheels 20 provided at its tip.
The carriage 18 is configured to be movably engaged with and moved along a guide rail 21 that slopes diagonally downward to the side of the movable frame 1 from a horizontal state near the tip of the rail 16. When the carriage 18 retreats onto the rear part of the rail 16, it is held horizontally, and as the carriage 18 moves forward, it is guided by the guide rail 21 and descends with its tip facing downward, while being held in an upright position.

In addition, like the upper support 7, the lower support 15 has a support part 22 on which the side PC lining board B is placed and supported, and a pair of support parts 22 that can be raised and lowered and rotated freely, and one of which can move forward and backward in the relative direction. A clamp part 24 with clamp claws 23, 23 is provided in a perpendicular shape, and a positioning arm 25 is rotatably connected to a horizontal shaft 26 on the lower surface of the tip, and the horizontal shaft 26 is rotated by a hydraulic motor or the like. This allows it to rotate approximately 180 degrees.

A crane is installed on the movable pedestal 1 and has a hanging arm 28 attached to a pivot shaft 27 so as to be horizontally rotatable and move forward and backward. While moving, the lining plates A and B loaded on the transport vehicle S can be lifted and transported and placed on the upper and lower supports 7 and 15.

The lining plates A and B are provided with nut joints at their front and rear ends, one of which is convex and the other concave, and are pin-joined at each joint.

"Operation of the Invention" As shown in FIG. 1, the left and right upper supports 7, 7 are lowered together with the lifting frame 4 and maintained almost horizontally. The plate A is lifted from the transport vehicle S, placed on the support part 10 and clamp part 11 of each upper support body 7, and positioned by locking the outer end to the positioning arm 12, and then set in the relative direction. The clamp claws 14 are moved to clamp and hold the clamp claws 14 and 14' in the vertical and longitudinal directions, and the positioning arm 12 is rotated rearward and released.

Then, while the elevating frame 4 is being raised, the cylinders 9 are used to lower the tips of the left and right upper supports 7 to some extent, and the left and right lining plates A and B are erected and held along the top end of the surrounding wall of the earth.

Next, in this state, the side lining plate B is lifted from the transport vehicle S by the lifting arm 28 of the crane and placed on the support part 22 and clamp part 24 of each lower support body 15 in the same manner as described above. After positioning and locking the locking protrusion protruding at or near the outer end with the positioning arm 25, the clamp claw 23,
23' to hold it tightly.

Then, while moving the left and right carts 18 forward in the lateral direction, the side lining plate B is gradually lowered and erected together with the lower support 15, and is smoothly erected and held on the side of the surrounding wall of the earth.

At this time, the tip of the upper supporting body 7 is raised somewhat by the cylinder 9 by using the gap with the ground, and the lower end of the top lining plate A and the side lining plate 15 are
Make sure that the top edges of the two face each other with some margin.

After the left and right lining plates A and B have been erected along the surrounding wall of the ground in this way, the tips of the left and right upper holding bodies 7 are lowered a little, and at the same time the cart 18 is moved back a little, and the lower holding bodies By pulling the upper end portions of the lining plates 15 inward, the nut joints of the lining plates A, A and A, B are engaged with each other to form an arch-shaped joint.

Next, after rotating and lowering the rear clamp claws 14', 23' of each clamp part 11, 24 and retracting them below each lining plate A, B, the front clamp claws 14, 23 are rotated and lowered. It moves backward to press each lining board A, B, and its rear end face is joined to the front end face of the previously installed rear lining board A, B via a sealing material.

Then, the positioning arm 25 at the tip of the lower support 15 is rotated backward to separate it from the lining plate B, and with the lower end of the lining plate B joined to the side wall concrete K, the lower support 15 is moved together with the cart 18. Return to horizontal position on the movable frame 1 while retreating,
Further, the upper support body 7 is lowered together with the elevating frame 4 to return to its original horizontal state.

After that, move the movable frame 1 forward by one pitch,
The lining plates A and B are successively erected by the same operation.

``Effects of the Invention'' As described above, according to the present invention, there is provided a movable pedestal formed in a gate shape capable of traveling along the rail in the direction of the tunnel and allowing vehicles to pass underneath, and a vertical guide at the center of the movable pedestal. An elevating frame that can be freely raised and lowered, and a proximal end pivoted to the left and right sides of the elevating frame so that the angle can be freely adjusted about a horizontal axis as a fulcrum, and the distal end is configured to be tilted diagonally downward in the raised position of the elevating frame. a pair of left and right upper supports, and a pair of left and right lower supports configured such that, after the upper supports rise, they move horizontally from below to the sides of the movable frame while their tips descend diagonally downward. Therefore, equipment required for excavation work and vehicles for transporting waste etc. can freely pass under the movable frame, making it possible to carry out construction work while carrying out excavation work. After the roof lining plate held on the upper support in the space is raised to the top together with the lifting frame and erected, the side lining plate is placed on the lower support below. Then, the side lining plate is moved laterally and lowered together with the lower support, and raised along the side of the ground, and the top cover plate is placed under the upper support while smoothly passing through an extremely narrow space. It can be efficiently built in series with the work board.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of this invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, Figs. 11
The figure is a front view showing an overview of the process of joining lining plates to each other;
12 to 14 are longitudinal sectional side views showing the process of joining the front and rear lining plates to each other. 1...Moving frame, 2...Rail, 3...Vertical guide, 4...Elevating frame, 7...Upper support,
15... Lower support, 16... Rail, 18...
Trolley, 20...Guide rail.

Claims (1)

[Claims] 1. A PC lining plate for the top end is held on a pair of left and right upper supports provided on a movable frame so as to be able to be raised and lowered and whose angle can be adjusted in the vertical direction, and the PC lining board is raised to the top end of the tunnel. After the upper support is raised, the lower support holding the side PC lining plate is moved horizontally to the side of the movable frame and raised, and the side PC lining is raised. The process of building the board on the side of the tunnel, and turning the upper support downward to install the PC for the top end.
A method for constructing a tunnel lining board, comprising the step of joining the lining board to the side PC lining board. 2. A movable frame formed in a gate shape so that it can travel along the rails in the tunnel direction and allow vehicles to pass below, an elevating frame provided in the center of the movable frame so as to be movable up and down on a vertical guide, and a movable frame provided above the elevating frame. a pair of left and right upper supports, the base ends of which are pivotably mounted on the left and right sides of the frame so that the angle can be freely adjusted with a horizontal axis as a fulcrum, and the ends of which are tilted diagonally downward in the raised position of the elevating frame; and a pair of left and right lower supports configured such that their tips descend diagonally downward while moving horizontally from below to the sides of the movable platform after being raised. Device.