A partition wall in a tunnel with a middle disconnection

Abstract

The invention discloses a tunnel mid-partition broken in the middle. The tunnel mid-partition includes an upper half mid-partition at the lower end of a lining vault and a lower half mid-partition atthe upper end of an inverted arch, the upper half mid-partition and the lower half mid-partition are opposite and a break gap is formed between the upper half mid-partition and the lower half mid-partition, and pre-arch stainless steel plates for sealing the break gap are arranged on both sides of the upper half mid-partition and the lower half mid-partition. The tunnel mid-partition effectively solves the problem that a mid-partition affects a lining arched stress system. The pre-arch stainless steel plates are used as connecting members and have good durability and reliability, and the problem that the driving safety is affected due to the fact that traditional top connection is prone to falling off is solved. The arc-shaped structure of the pre-arch stainless steel plates has a large deformation capacity, does not affect the stress system of a lining and the mid-partition, and enables a calculation model to be clear. The pre-arch stainless steel plates are located in the middle of the mid-partition, the construction space at the top of the lower half mid-partition is ensured, and construction is convenient.

Description

technical field [0001] The invention belongs to the technical field of partition walls in tunnels, and in particular relates to a partition wall in tunnels with a middle disconnection. Background technique [0002] In recent years, urban rail transit projects have developed rapidly in my country, and major cities across the country are building or planning subways. A middle partition wall is required in the middle of a single-hole double-track tunnel to isolate the caverns on both sides and meet functional requirements such as fire evacuation. [0003] Generally, according to the supporting relationship between the partition wall and the tunnel lining structure, the partition wall can be divided into two types. One method is that the partition wall is rigidly connected with the lining vault and the inverted arch, and the partition wall supports the tunnel vault. As a result, the setting of the partition wall causes large bending moments and shear forces on the lining vault...

AI Technical Summary

Problems solved by technology

This method solves the problem of the force on the arch, but it is difficult to effectively fix the flexible material filled in the gap on the top of the wall. Under the action of the wind pressure of the train, it is easy to fall off to the track, which poses a great hidden danger to driving safety.

Moreover, the distance from the top of the partition wall to the vault is very small, which is not convenient for concrete pouring, which affects the construction speed and quality control

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