JPH02112596A - Concrete contact-bonding lining device in tunnel - Google Patents

Abstract

PURPOSE:To conduct the contact-bond lining of concrete positively by installing a telescopic type arm to a travelling truck and moving a form body mounted to the nose of the arm along the sectional shape of a tunnel by controlling polar coordinates. CONSTITUTION:Mounting plates 4A, 4B rotatable in bilateral symmetry are disposed to the body frame 3 of a travelling truck 1, and telescopic type arms 6A, 6B are projected to the mounting plates through a parallel link type. Form bodies 9A, 9B for concrete lining in required thickness are mounted at the noses of the arms 6A, 6B. Concrete is fed while the form bodies 9A, 9B are moved by controlling polar coordinates as the rotation of the mounting plates 4A, 4B and the expansion and contraction operation of the arms 6A, 6B are made to cooperate. Concrete is lined successively along the sectional shape of a tunnel toward the center from lower bottom both ends.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for reliably lining concrete in tunnel construction while suppressing dust generation and splashing of concrete.

[Conventional technology]

Conventionally, in tunnel construction, the tunnel is excavated to the required cross-sectional shape and lined with concrete to reinforce the rock surface of the ground. This concrete lining is carried out using the so-called spray concrete method. This involves dry-mixing or wet-mixing the materials, feeding them through a hose with compressed air, adding pressurized water or quick-setting agent near the nozzle, and spraying toward the ground to line the ground.

[Problem to be solved by the invention]

In the primary covering of tunnels, spraying is when concrete is sprayed onto the ground under high pressure in the concrete construction method.
This concrete spraying pressure can cause dust adhering to the ground to fly up, and during spraying, the material bounces off the ground and generates dust, worsening the working environment and causing pollution problems such as pneumoconiosis. This results in material loss due to material rebound. In order to solve these drawbacks, a construction method has been proposed in which concrete is directly bonded to the ground using formwork.

However, the crimp lining method is still in the experimental stage and has drawbacks such as the large size of the equipment and the inability to maintain accuracy when the formwork slides along the ground.

The object of the present invention is to provide an apparatus that can reliably perform this concrete pressure bonding lining.

[Means to solve the problem]

At least two mounting plates that can be rotated symmetrically are arranged on the main body frame of the traveling trolley, and telescopic arms are protruded from each mounting plate in the form of parallel links, and the tips of the arms are covered with concrete of a required thickness. The system is equipped with a formwork body to be constructed, and as concrete is supplied, the formwork body is moved along the cross-sectional shape of the tunnel from both sides of the bottom toward the center using polar coordinate control by rotating the mounting plate and expanding and contracting the arm. The required concrete lining will be placed on the ground surface.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete compression lining device for tunnels according to the present invention will be explained below based on the illustrated embodiments.

In the figure, reference numeral 1 denotes a running bogie that is equipped with endless tracks IK and IK at the bottom and is driven between an internal combustion engine.A launch machine 2.2 is provided at both the front, rear, left and right ends of this running bogie 1, and this launch machine 2 is used to move the running bogie. Lift up the whole part 1 and set it in the specified position. This is the same configuration as that used in ordinary truck cranes.

A main body frame 3 is provided on the traveling trolley 1, and a mounting plate 4A faces the main body frame 3 from side to side.

4B are provided rotatably, and the mounting plates 4A and 4B are provided facing each other in the front and rear direction, and the mounting plates 4A and 4A facing each other on the left front and rear of the traveling bogie 1 are coaxially supported and similarly run. Mounting plates 4B and 4B, which are provided oppositely on the front and rear right sides of the truck, are also coaxially supported and can be rotated by the rotation of their respective axes. The rotation of this mounting plate 4A or 4B is based on the shaft 4.
C, 4D or the mounting plates 4A, 4B are rotated at the required speed by a drive device 5 directly attached to the mounting plates 4A, 4B. Mounting shaft 4C of two mounting plates 4A and 4B
94D shall be parallel, and preferably the mounting axes 4C and 4D should be symmetrical with respect to the center of the traveling trolley l.
shall be installed. The drive device 5 for the mounting plates 4A and 4B is controlled and driven by the CPU. Furthermore, two telescopic arms 6A are attached to the two mounting plates 4A and 4B.

Bracket the proximal end of 6B? It is pivotally connected and protrudes through A and 7B. Therefore, the mounting plates 4A and 4A on the left side of the traveling bogie 1
Two arms 6A, 6A, 6A, and 6A are protruded from each other to form a parallel link, and the distance between the arms 6A and 6A protruding from the same mounting plate 4A is the same as that between the base end brackets. A link 8A is constructed at an intermediate position between the arms 6A, 6A, and a formwork body 9''A is arranged and pivoted at the tips of the arms 6A, 6A, and the formwork body 9A, link 8A, and bracket 7A are connected to each other. , 7A and two arms 8A, 6A constitute a parallelogram link.The angle of this quadrilateral link is changed between the two arms 6A, BA, and between the bracket 7A of one arm and the other arm. A cylinder IOA is arranged on a straight line connecting the link pivot point of the arm, and arm 6A is moved by the operation of this cylinder IOA, that is, by the expansion and contraction action of the cylinder rod.

It is possible to change the angle of the quadrilateral by 6A.

Similarly, there are two arms 6A on each of the left front and rear mounting plates 4A, 4A of the traveling bogie 1.

6A is provided in a protruding manner, and the above-described one form body 9A is attached to the tips of the four arms 6A.

Further, each of the four arms 6A appears or disappears independently or at the same time, and by adjusting the total length of each arm 6A and collaborating with the swinging of the arm, that is, the rotation of the mounting plate 4A, the shape is formed along the cross-sectional shape of the tunnel ground. Allow the frame body to move.

Now, we have explained the arm configuration of the left half of the traveling bogie l, but the right half also has two mounting plates 4B, front and rear,
Two telescopic arms 6 on each 4B
A total of four arms B and 6B are provided protrudingly, and one formwork main body 9B is arranged and pivoted at the tips of these four arms.

In this way, a telescopic arm link mechanism having the formwork body at its tip is formed symmetrically, and the left and right link mechanisms are driven synchronously or independently.

Also, brackets 7A and 7B that attach arms 6A and 6B to mounting plates 4A and 4B are provided with universal joints, and arms 6A and 6B are attached to mounting plates 4A and 4B.
4B so that it can swing in the front-rear direction and in the circumferential direction.

Reference numerals 11A and 11B are operation rooms for operating the formwork bodies 9A and 9B, which are installed opposite to the left and right arm link mechanisms on the traveling carriage, respectively, and are equipped with telescopic arms 12A and 12B that similarly swing. Concrete mixed with an quick-setting agent is supplied into the form body through supply pipes 13A and 13B.

Furthermore, the pair of left and right arm link mechanisms on the traveling carriage are each controlled by polar coordinate control, and the electrical circuit diagram thereof will be omitted.

Since the formwork bodies 9A and 9B have the same configuration, the formwork body 9
A will be explained below. The formwork main body 9A has a curved surface similar to the arch shape of the tunnel cross section, and has brackets 91 and 92 for arm attachment on the front and rear sides, and a side formwork 93 is formed at the side end. do. This is formwork body 9
A plurality of air cylinders 94 are arranged in a protruding manner on one side in the longitudinal direction of A, and all the air cylinders 94 are arranged in series in the form of an air circuit, and are wrapped around all the air cylinders to provide flexibility and elasticity. It is covered with a sheet 95 provided. Therefore, when a ball is placed at the tip of the rod of this air cylinder and the ball comes into contact with the mountain surface, the ball of each air cylinder will move in and out along the uneven shape of the other mountain surface.
The balls of the entire cylinder are brought into contact with the ground surface through the sheet 95 with equal pressure, thereby preventing the cast concrete from flowing out from the side of the formwork.

A construction method for lining the ground surface with concrete using *It configured as described above will be explained.

The traveling trolley 1 is placed on the bottom reference line of the ground that has been excavated into a desired cross-sectional shape, and fixed and stopped by a hoisting machine. At this time, mounting plates 4A and 4B facing the old hole center and the left and right sides of the traveling bogie 1
Check the positional difference between the center and the center. The value of this positional deviation difference is given to the polar coordinate control circuit in advance, and the arm 6A is adjusted in accordance with this value and the cross-sectional shape of the tunnel.

The mounting plates 4A and 4B are rotated while expanding and contracting the mounting plate 6B. At this time, as shown in Fig. 1, the arms 6A and 6B provided on the mounting plates 4A and 4B are in the tilting position, and the formwork bodies 9A and 9B at the ends of the arms are in contact with the reference plane at both ends on the ground. Make it. Then, based on polar coordinate control, the arms 6A and 6B are swung in a direction toward each other, that is, from the arm tilting position toward the vertical position. At this time, the arm swing speed is set in accordance with the time when the concrete supplied into the form bodies 9A, 9B is solidified by the action of the quick-setting agent and the concrete has the required hardness. Of course, the formwork body 9A,
When moving 9B along the shape of the ground, concrete is continuously supplied, and the concrete solidifies sequentially on the ground surface to form a lining to the required concrete thickness.

When both arms 6A and 6B reach the central part of the ground, the lining concrete becomes one piece and has the desired core strength. When the formwork bodies 9A and 9B move along the ground surface due to the swinging of the arms 6A and 6B, the supplied concrete is prevented from flowing out by the sheets 95 on the sides of the formwork, ensuring reliable and material loss. Without it, it will be covered under construction.

Note that a rubber or soft synthetic resin sheet 96 is integrally attached to the surfaces of the formwork bodies 9A, 9B, that is, the surfaces facing the ground surface, in order to improve peeling from concrete.

In the above embodiment, the traveling bogie 1 can approach and stop at a close position set on the back wall of the tunnel, but if there is an unexcavated part in the center of the back wall of the tunnel due to ground properties etc., the running bogie 1 Arm 6A from the stopped position,
6B is further swung toward the inner back wall, the formwork bodies 9A and 9B are aligned with the lower bottom of the inner back wall, and then, as described above, the arm is turned upward at a speed that matches the concrete hardening speed while supplying concrete. The concrete lining is performed in the desired direction by swinging the concrete lining in the desired direction, and this construction method can be applied even when there is an unexcavated part in the center of the back wall of the tunnel.

That is, if the face is prone to collapse due to the properties of the ground, etc., in order to prevent the face from collapsing during the excavation process, the central part of the face may be left and the outer periphery is excavated in a ring shape to form an unexcavated part at the center of the face. In such a case, the device of the present invention is set in the vicinity of this unrecommended cutting area, and then the link type arms 6A and 6B are attached to the brackets as shown by the chain lines in FIG. A,
Formwork body 9A is installed at the universal joint set in 7B.
, 9B are made to protrude forward from the main body of the device so as to approach the ring-shaped excavated face. This state is shown by the chain line in Figure 2. Next, in the same manner as described above, the desired concrete lining is performed while moving the arms 6A and 6B in the circumferential direction along the cross-sectional shape of the tunnel, and then the unexcavated central part of this face is covered with concrete. This involves excavating the area.

After moving the formwork body from the bottom to the top center and lining with concrete for the required width, the device is moved back and the next predetermined distance is excavated and removed to proceed to the next process. This process is repeated one after another.

〔Effect of the invention〕

According to the present invention, at least two symmetrically rotatable mounting plates are disposed on the body frame of a traveling bogie equipped with a lifting mechanism and a limited track traveling mechanism, and each mounting plate is provided with a telescopic arm. The formwork is protruded in a parallel link type, and has a formwork body lined with concrete of the required thickness at the end of the arm.As concrete is supplied, the formwork body is shaped into a tunnel cross-sectional shape by rotating the mounting plate and expanding and contracting the arm. The concrete is moved from the bottom side towards the center along the ground using polar coordinate control to line the ground surface with the required concrete, making it easy to set it in the excavation hole and to prevent the tunnel from slipping. Construction accuracy is improved because the formwork body can be moved accurately according to the cross-sectional shape. In addition, the link type arm equipped with the formwork body can extend and contract and swing back and forth and in the circumferential direction, so concrete lining can be performed regardless of the shape of the back wall inside the tunnel.

[Brief explanation of the drawing]

The drawings show an example of the location of the concrete compression lining device in a tunnel according to the present invention, and FIG. Figure 3 is an explanatory diagram of the main body frame and hoisting machine provided on the traveling truck, Figure 4 is the drive device for the mounting plate, and Figure 5
The figure is an explanatory view of the form body. l is the traveling trolley, 3 is the main body frame, 4A, 4B are the mounting plates, 6A, 6B are the arms, 7A, 7B are the brackets, 8A
. 8B is a link, 9A. B is the formwork body.

Claims (1)

[Claims] (1) At least two mounting plates that can be rotated symmetrically are arranged on the main body frame of the traveling trolley, and a telescopic arm is protruded from each mounting plate in the form of a parallel link, and the required thickness is attached to the tip of the arm. Equipped with a formwork body for lining concrete, the formwork body is controlled in polar coordinates along the cross-sectional shape of the tunnel from both sides of the bottom toward the center by the rotation of the mounting plate and the expansion and contraction of the arm as concrete is supplied. 1. A concrete pressure bonding lining device for a tunnel, characterized in that the concrete lining device for a tunnel is moved by moving the concrete lining device to cover the ground surface with the required concrete.