JPH0416699A - Concrete lining method - Google Patents

Abstract

PURPOSE:To improve the workability by moving a funnel-shaped trowel, having a shallow taper in the inner face, along a neighboring circular timbering while feeding concrete to the trowel to applying it between timberings. CONSTITUTION:A circular gantry 6 is arranged movably in a tunnel in the tunnel provided with circular timberings 1 made of H-beams at regular intervals. Next to the gantry 6, a moving supporter 8 reciprocately moving along whole circuit thereof is equipped. Next, a trowel C making it possible to ascend and descend and to turn to all directions and of tabular body is attached to the supporter 8 via a link mechanism B. Still more, tapered surfaces 3a, 3b along moving direction are formed in facing state inside the trowel C, and moreover brush layers 2 are projectively provided to the end parts thereof. The supporter 8 is made to move, as the trowel C is made to slide along the timbering 1, concrete is made to press feed inside thereof, and coated between the timberings 1. It is possible thereby to prevent dust, and to work uniformly and easily.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a coating method for the inner wall of a tunnel that enables concrete, mortar, etc. to be applied to the inner wall surface of a tunnel formed by excavation or blasting. be.

(Prior art) Conventionally, in order to prevent the inner wall surface of tunnels formed by excavation or blasting from collapsing, cracking, and water leakage, concrete or mortar was applied to the inner wall surface of the tunnel using a spraying machine. Generally, a concrete or mortar layer is formed by spraying a concrete or mortar layer.

(Problems to be Solved by the Invention) As mentioned above, when spraying with a spray machine, water containing cement may be rapidly released into the air from the nozzle of the spray machine, creating a mist, or may be caused by splashing of concrete. Concrete dust creates a bad environment inside the tunnel.
However, it has a particularly bad effect on the human body, and is also used for spray painting.

The spraying was also performed on the surface sides of both adjacent supports, resulting in problems such as an uneven sprayed layer and unnecessary spraying.

An object of the present invention is to solve the above-mentioned problems.

(Means and Effects for Solving the Problems) The present invention has been made in view of the above points, and includes a link mechanism that extends from a support device that can be installed in a tunnel and is movable by extension and contraction.

Trowels that can receive concrete, etc. are installed in series on the front side, and the front side of the trowel has two tapered surfaces that are high on the front and rear ends in the direction of movement, and low on the inner side (so that the tapered surfaces are opposite to each other). Formed.

Coating concrete, etc. by moving both steps of the trowel along the surfaces of the adjacent supports and moving them to one side using both supports as guides, and then moving the trowel in the above direction without reversing the direction of the trowel. By moving the concrete to the other side, the concrete, etc. supplied to the front of the trowel is prevented from protruding forward by the tapered surface on the front side in the direction of movement, and is squeezed by the tapered surface on the rear side in the direction of movement. By doing so, it can be pressed properly and coated well on the inner wall surface of the tunnel between the two supports.

(Example) Next, one embodiment of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes an H-shaped steel support that is curved into an arc, and is installed parallel to the inner wall surface of a tunnel formed by excavation or blasting at regular intervals.

In FIGS. 1 and 2, the support device A is.

It consists of a gantry 6 which is movably installed in the tunnel with its lower end supported by supports 5.5 on both sides. A movable support body 8 that can reciprocate is equipped, and a link mechanism B is installed extending from the movable support body 8. The link mechanism B connects a large number of links 9 and has a base side that extends and contracts in the front and rear directions. Hydraulic cylinder lO.

Hydraulic cylinders 11 that extend and contract in the vertical direction are installed on the tip sides, and hydraulic motors 12 that rotate in the horizontal direction and hydraulic motors 13 that can rotate in the front-rear direction are installed on the tip sides. The trowel C, which is a plate-shaped body, is arranged in series.

Note that the support device A can also be constructed by using a moving vehicle body, extending a link mechanism similar to the above embodiment from the moving vehicle body, and connecting a trowel C to the tip side thereof in the same manner as in the above embodiments. .

The plate-shaped trowel C has stepped portions 14 and 14 formed at both lateral ends of the front surface so that they can approach the surfaces of the two adjacent supports 1. .2 are provided in a protruding manner, and an outflow hole 15 is formed so as to open at the center of the front surface in the direction of movement. Both tapered surfaces 3a are tapered inversely to each other.

3b are formed symmetrically, and the tip of a conveying hose 16 extending from a concrete pump P movable within the tunnel is connected to the rear of the outflow hole 15.

Note that the hydraulic cylinder 10.11 and the hydraulic motor 1
2.13 is equipped with a sensor that can detect the force with which the trowel C is pressed against the surface to be coated.

The system is configured so that the operator can perform appropriate operations while grasping the concrete application status through this detection.

Therefore, while moving the movable support 8 along the outer periphery of the gantry 6 that can be moved and installed in the tunnel, the trowel C is placed at the starting position while moving the link machine IIIB, and both adjacent supports 1 When the trowel C is moved in the direction of arrow A while supplying concrete to the front surface of the trowel C, the inner wall surface between the 1 and 1 supports 1. 4, but the concrete supplied to the front side is the tapered surface 3a on the front side in the direction of movement.
This prevents it from protruding to the front side, and the tapered surface 3b, which is on the rear side in the direction of movement, squeezes and presses it moderately, and it is applied in a uniform layer to give a good finished surface. It turns out.

Further, when the trowel C is moved in the direction of arrow A to finish painting immediately, the trowel C is moved between the two primary adjacent supports 1 and 1 to perform painting again.

Move the iron C without turning it around.

When painting is carried out while moving the trowel C in the direction of the reverse arrow A, it is possible to apply the concrete while squeezing the concrete with the tapered surface 3a on the rear side in the moving direction.

(Effects of the Invention) This invention is constructed as described in detail above, and while the trowel is moving between the two adjacent supports and applying concrete, one of the tapered surfaces on the forward side in the direction of movement is used to prevent the concrete from protruding. It is possible to apply the paint evenly and well while applying good pressure by squeezing it with the other tapered surface on the rear side.
In particular, in the secondary process where the taper is tapered in both the front and rear directions as described above, if the trowel is moved in the opposite direction without reversing it, the tapered surface on the rear side in the direction of movement will move the concrete in that state. It is possible to apply a good coating while squeezing the paint just the right amount.

Therefore, according to the method of the present invention, the method has the advantage of being easy to operate, and also having good workability and being able to coat concrete between both supports, so that it can be carried out suitably.

[Brief explanation of drawings]

Fig. 1 is a side view showing the entire device used to carry out this invention, Fig. 2 is a rear view of a part of Fig. 1, Fig. 3 is a side sectional view of the main part, and Fig. 4. is a perspective view. A...Support device B...Link mechanism C...
Trowel 1... Support 2... Brush layer 3a, 3b... Tapered surface 4... Inner wall surface Patent applicant Komatsu Ltd. Representative (patent attorney) Osamu Matsuzawa (and 1 other person) 1st Figure Figure Figure

Claims (1)

[Claims] A long link mechanism that connects a plurality of links and can extend and rotate at least in the front, back, up, down, and lateral directions by interposing a telescopic cylinder or the like is installed from the traveling vehicle, and the tip side of the link mechanism is covered with concrete, etc. When performing concrete lining by spraying concrete on a rock wall surface multiple times using a concrete painting trowel device, the trowels that can be rotated and placed in series so that they can be received from the front are used. Both tapered surfaces are formed symmetrically on the front surface, with the front and rear ends in the direction of movement being higher and the inner side being lower and tapering inversely to each other, and both steps of the trowel are aligned with the surfaces between the two adjacent supports. A concrete coating method in which concrete is applied to a rock wall surface by moving the trowel to one side using both supports as guides, and then moving the trowel to the other side opposite to the direction described above without reversing the direction of the trowel. Construction method.