Test method for internal force of formed shield tunnel segment

Abstract

The invention discloses a method for detecting the internal force of a shaped shield tunnel segment. Pressure sensors are respectively buried on the annulus and end faces of the tunnel segment, and the pressure sensor is connected with experimental equipment to monitor the thrust of oil cylinders in different regions during the shield tunneling process. Change value, deformation data of segment dislocation, and analyze them. The present invention adopts the above method for detecting the internal force of the formed shield tunnel segment, obtains the relationship between segment displacement deformation and thrust, and analyzes the relationship between segment force and damage, which can improve the assembly quality and sealing effect of the tunnel segment, and further ensure the forming The quality of the tunnel.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a method for detecting the internal force of a formed shield tunnel segment. Background technique [0002] During the propulsion process of shield tunneling, the assembly quality and stress state of the formed segments are not only affected by the assembly quality of the segments, but also by the thrust of the propulsion cylinder. In addition, due to the difference in the force of the segment in the tail of the shield and after it is out of the tail of the shield; the distribution of the thrust of the propulsion cylinder has a greater impact on the offset of the segment and the sealing state of the segment. [0003] In actual engineering, in addition to considering the effect of jack thrust, another key influencing factor is the pre-tightening force of bolts. Although many scholars at home and abroad have conducted some research on the influence of bolt preload on the m...

AI Technical Summary

Problems solved by technology

Although many scholars at home and abroad have conducted some research on the influence of bolt preload on the mechanical performance of segment joints, there is a lack of support from field test data.

Moreover, the stress and deformation of the lining structure is a three-dimensional space problem. The change of the jack thrust at different positions and the change of the bolt pre-tightening force will affect the overall stress and deformation of the lining structure.

[0004] At home and abroad, the experimental research on the stress state of the shield tunnel segment is only the indoor model test, and the effect of the jack thrust difference is not considered.

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