Tunnel construction method

Abstract

A construction method for tunnel includes inserting a copper rod from the start position to destination position to form a drawing member, arranging a concrete caisson at start position, installing cutting tools onto its front end, passing said copper rod through the concrete caisson, installing a hollow jack to the drawing member to the back end of concrete caisson, arranging the first anchor for the jack, arranging the counterforce body at start position, passing said drawing member through it, installing the second anchor for it, digging while extending jack and moving the first anchor, and continuously repeating the previous step.

Description

Technical field [0001] The present invention relates to a tunnel construction method in which a concrete caisson body advances underground so as to construct underground structures such as underground passages, bridges, waterways, etc., in the ground below the railway line or the road surface and under the river bed. Background technique [0002] In order to construct an underground structure that crosses the ground under the railway line or under the road surface, the most common construction method is to dig a trench from the ground with a single bucket excavator such as a backhoe. Among them, an underground structure made of concrete is composed of a model board building, a concrete caisson is set, and the so-called open-cut method is backfilled. [0003] However, in the open-cut method, because it is digging down from the ground, it is necessary to disconnect the train operation or road traffic. On the contrary, in the case of train operation or road traffic priority, in orde...

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned shield tunneling method is effective when constructing a tunnel in a relatively deep underground place. However, in the case of construction near the surface with shallow cover soil, the earth and sand in the shallow cover soil will be dragged when the shield boring machine advances. , subsidence occurs on the ground part, which has the disadvantage of causing adverse effects on the above-ground structures

[0009] In addition, the shield boring machine itself is a cylindrical boring machine, and as mentioned above, since a segment body is assembled on the ring to construct a cylindrical tunnel, it is used in a tunnel with a rectangular cross section, such as an underground railway, etc. In this case, due to the difference between the circular shape and the rectangular shape, there is a useless part that cannot be used inside the tunnel, and redundant excavation is performed, or redundant concrete must be used, and the construction cost of this part is also quite high.

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