Steel support for overlapped tunnels

Abstract

The invention belongs to the technical field of steel structure design and manufacture in the civil engineering industry, and particularly relates to a steel support for overlapped tunnels. The steel support for the overlapped tunnels is characterized in that the steel support mainly consists of multiple identical support systems and rails; the multiple support systems are parallelly arranged on the rails; each support system is of a round structure, and the lower part of each support system is provided with single-rim wheels which are located on the rails; every two adjacent support systems are fixedly connected through a plurality of connection parts; the lower part of the support system at the outermost side is provided with rail lock catches which are connected with the support system through hydraulic oil cylinders which are horizontally arranged; and the rail lock catches are fixedly locked on the rails. The steel support for the overlapped tunnels has the characteristics of being low in cost, easy for manufacture and disassembly and the like; besides, compared with tunnel support equipment in the prior art, the steel support is advantaged in that a tunnel segment with a larger area can be protected, and especially, the effect for protecting a tunnel segment at the lower part is better.

Description

technical field [0001] The invention belongs to the technical field of steel structure design and manufacture in the civil engineering industry, and specifically relates to a steel support for overlapping tunnels; it is mainly used in the support construction of overlapping tunnels in subway construction, and is especially suitable for the support protection of down tunnels. Background technique [0002] In the construction of subway projects, it is a common construction problem to overlap the upper and lower tunnels with small spacing. According to the mechanical characteristics of shield tunneling, the method of excavating the downward tunnel first and then the upward tunnel is generally adopted for construction. During the construction of the uplink tunnel, it will have an impact on the surrounding soil and the downlink tunnel that has been formed, and seriously cause the downlink tunnel to have different degrees of misalignment and water leakage. Hydraulic support is ge...

AI Technical Summary

Problems solved by technology

This type of point support is prone to stress concentration of the segment at the support, resulting in local rupture of the segment

The whole equipment is very difficult to manufacture, and ordinary small steel structure factories cannot manufacture it.

In addition, the existing hydraulic support trolley also has disadvantages such as high manufacturing cost, difficult disassembly and insufficient protection for the down tunnel.

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