JPS62248800A - Method of repairing tunnel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a tunnel repair method.

<Conventional technology> Various excellent methods have been developed for constructing new tunnels.

However, there is still no efficient or reliable repair method for tunnels that have already been completed and are in use.

There is no established method in places such as railway tunnels, where working time is extremely limited and the working space is full of obstacles such as overhead wires and signal lines.

As a result, work is only carried out using very inefficient methods, such as trying to carry out common tasks outside the tunnel one by one inside the tunnel, based on delusion and error.

OBJECT OF THE INVENTION The present invention has been made to improve the above-mentioned problems, and it is an object of the present invention to efficiently and systematically perform repair work even in railway tunnels where work time and work space are extremely limited. The purpose is to provide a repair method that can be used.

Structure of the Present Invention> Next, an embodiment of the repair method of the present invention will be described, starting with the working device used.

Concrete Pump The concrete pump 1 is a pump truck having a tank 12 mounted on a cart 11 with wheels 13.

Compressed air at a constant pressure is supplied to the inside of the tank 12, and the concrete is discharged from the tip of the hose 14.

Scaffolding Cart The scaffolding cart 2 is a cart having wheels 21, on which a scaffolding floor 22 that can be raised and lowered is attached.

To this end, the pillars 27 that support the scaffolding floor 22 are constructed in a jack or pantograph style so that they can expand and contract.

The scaffolding cart 2 is equipped with not only scaffolding but also a generator 23, a pump 24 and tank 26 for quick-setting materials, and a tank 25 for washing water.
etc. are installed at the same time.

A worker riding on this scaffolding cart 2 performs the work of chipping concrete on the inner surface of the tunnel and the work of pasting wire mesh.

Kuha> Spraying trolley The spraying trolley 3 is also a trolley mounted on wheels 31, on which a spraying scaffold 32 that can be raised and lowered is provided.

On top of this spraying scaffold 32, a mast 33 is vertically erected, which can slide freely on the scaffold and can extend and contract in the vertical direction.
A nozzle 15 at the tip of a concrete hose 14 is rotatably mounted on this mast 33.

For this purpose, the worker must move and raise/lower the nozzle 15.
3. It can be operated freely and easily while mounted on the top.

A high-pressure air hose for supplying high-pressure air is connected to the middle of the hose 14 in order to inject concrete from the nozzle 15, and a quick-setting material supply hose is connected near the nozzle 15.

Repair method〉 Kui〉 Proceed to the premises Immediately after the last train has passed, move the cart with each wheel into the inside of the tunnel.

Since all the trucks are designed for tunnel repair, each truck can be placed in the required position within a short period of time.

Exit> Chilling work The scaffolding floor 22 of the scaffolding cart 2 is raised, and the workers on top of it lift the deteriorated concrete.

This chiseling will be necessary especially if the concrete has deteriorated to the inside.

Afterwards, rock anchors and rock bolts are driven in to reinforce the inner surface of the tunnel, and wire mesh is sometimes pasted there.

(kuha) Spraying of concrete After removing concrete that has progressed to deterioration, concrete is sprayed on the inner surface of the concrete.

Concrete is discharged from the pump l at a relatively low pressure and in a mushy state, but since high-pressure compressed air is supplied from the middle of the hose 14, the concrete is sprayed with strong pressure from the nozzle 15 onto the inner surface of the tunnel. be able to.

(ii) Removal All working equipment must be removed before the first train passes, but since all the equipment of the present invention is mounted on a bogie, it can be pulled by a self-propelled or driven vehicle to resist resistance. You can evacuate to.

Effects of the present invention> Since the present invention systematically performs repairs using the above-mentioned device, it is possible to efficiently perform work inside tunnels where work space and work time are extremely limited. Can be done.

As mentioned above, an increasing number of tunnels are nearing the end of their concrete lifespan, but the current situation is that they cannot actually be repaired because it is difficult to take concrete measures to repair them.

However, since the construction method of the present invention is performed as described above,
Repairs can be performed efficiently, safely, and with high reliability.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the working device of the present invention.

Claims (1)

[Claims] A concrete pump that continuously discharges concrete using the pressure of compressed air mounted on a truck; a nozzle fixed to the tip of a pipe extending from the concrete pump; A concrete supply means consisting of a pressurized circuit that supplies compressed air to the tunnel, a scaffold installed on a trolley that can be raised and lowered, and a scaffold for spraying concrete are used to construct a tunnel. A tunnel repair method that involves chiseling out the inner surface, then using scaffolding to attach wire mesh to the tunnel's inner surface, and then spraying concrete on top of the wire mesh.