Construction method of flexible anti-seismic joint of immersed tunnel

Abstract

The invention provides a construction method of a flexible anti-seismic joint of an immersed tunnel, and relates to the technical field of engineering construction. The construction method of the flexible anti-seismic joint of the immersed tunnel comprises the following specific steps that S1, firstly, an immersed foundation trench after river bottom dredging is accurately measured, the flatness, the gradient and the size width of each position of the foundation trench are repeatedly confirmed, and an immersed pipe section can be accurately immersed into a designated installation position in the pipe immersing process; and S2, the pipe section subjected to watertight detection is subjected to floating transportation by utilizing a floating pontoon, and after the floating pontoon reaches the designated position, a floating pontoon operator can accurately position the immersed pipe position of the pipe section again according to positioning information sent by an underwater diver. The pipe section is connected and fixed by adopting a flexible steel cable, and a connecting part is subjected to over-sealing treatment through pressing of a waterproof pad and a waterproof ring, so that the firmness and the stability of pipe section connection can be ensured, meanwhile, high-quality sealing treatment can be realized, and the situation of leakage is prevented.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a construction method for a flexible anti-seismic joint of an immersed tube tunnel. Background technique [0002] The Hong Kong-Zhuhai-Macao Bridge Immersed Tunnel is the first offshore immersed tunnel built in my country, the longest road immersed tunnel and the only deeply buried immersed tunnel in the world. Joint design and processing technology is the key to the immersed tunnel One of the technologies; the design of the joints should be able to withstand temperature changes, earthquake forces and other effects, and ensure good water tightness. There are joints in between, and there are two types of joints: rigid joints, which have similar section stiffness and strength to the connecting pipe sections; flexible joints, which allow relative displacement in the directions of the three main axes. In some cases all joints in immersed tunnels are of the same type, ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a construction method for the flexible anti-seismic joint of the immersed tube tunnel, which solves the problem that the construction of the flexible anti-seismic joint not only needs to ensure the stability and firmness of the connection, but also ensures the water resistance, sealing and anti-seismic properties of the connection. There are extremely high requirements. Once the connection is unstable or leaks occur during the docking construction process, it is easy to cause a large safety hazard in the subsequent use of the tunnel.