Vibration-resistant and damping method for connection part of shield tunnel and vertical shaft

Abstract

The invention discloses a vibration-resistant and damping method for a connection part of a shield tunnel and a vertical shaft. The method comprises the steps that A, a vibration-resistant reinforcing body is constructed, wherein the vibration-resistant reinforcing body is composed of a main reinforcing body (1) and a gradual change reinforcing body (2), and the width and depth of the gradual change reinforcing body are consistent with those of the main reinforcing body; B, a vibration-resistant reinforcing ring is constructed, wherein a shield excavation profile surface is reinforced while the vibration-resistant reinforcing body is constructed, secondary grouting reinforcement is performed on the area through a pipe piece reserved grouting hole, and the vibration-resistant reinforcing ring is formed on the shield excavation face; C, a flexible damping layer is constructed, wherein after the shield tunneling machine breaks a wall, the outer diameter of a cutter disc is larger than the diameter of the pipe piece, a building gap is generated between the pipe piece and a soil body when the pipe piece is disengaged from a shield tail, the flexible damping layer is constructed in the building gap through a shield tunneling machine synchronous grouting system, and finally the flexible damping layer is formed. The scheme is easy to implement, operation is easy and convenient, flexible damping materials are sufficiently utilized, and the good effects on vibration resistance and damping of the shield tunnel are achieved.

Description

technical field [0001] The invention relates to the field of anti-seismic technology of rock and soil, in particular to an anti-seismic and shock-absorbing method for the connecting part of a shield tunnel and a vertical shaft. It is mainly applicable to the seismic design and construction of the connection between the shield tunnel and the vertical shaft in the soil strata of the high-intensity area. Background technique [0002] In recent years, with the rapid development of my country's infrastructure construction, a large number of railways, highways, subways, hydropower tunnels (holes) have been built and put into use, and the tunnels under construction are still growing at a rate of hundreds of kilometers per year. The shield tunneling method adopts modern means, which has the advantages of fast construction speed, high efficiency, good working environment, and high degree of safety guarantee, so that shield tunnels account for a considerable proportion of the tunnels ...

AI Technical Summary

Problems solved by technology

However, shield tunnels under construction in high-intensity areas in my country mostly use the traditional rigid connection method, which has poor seismic performance and is difficult to meet the structural seismic safety performance requirements.

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