Analysis method for determining longitudinal bending rigidity of shield tunnel

Abstract

The invention discloses an analysis method for determining longitudinal bending rigidity of a shield tunnel. The method is suitable for analyzing longitudinal bending rigidity of a tunnel structure in different design conditions. The method has wide application prospects in the field of shield tunnel construction, especially city track construction. According to the method, the problem of difficulty in comprehensive consideration of influences of various factors such as a splicing mode, transverse rigidity, a bolt effect and the like of the shield tunnel in existing calculation analysis is avoided, an actual shield longitudinal rigidity law is obtained, and a simple, convenient and reliable determination thought is provided for the value-taking problem of the rigidity of the shield tunnel in a theoretical analysis method or a numerical simulation method for the shield tunnel. The analysis method takes an actual tunnel as an analysis object and performs analysis based on structural deformation monitoring data of an existing undercrossing interval tunnel, so that the actual condition of the tunnel is reflected objectively. Moreover, the method is relatively low in actual investment, convenient and fast. The analysis method is suitable for analysis without influences of formation conditions, tunnel diameters, duct piece sizes and connection modes, thereby being high in adaptability.

Description

technical field [0001] The invention relates to an analysis method for determining the longitudinal bending rigidity of a shield tunnel, which is suitable for analyzing the longitudinal bending rigidity of a tunnel structure under different design conditions. It has broad application prospects in shield tunnel construction, especially in the field of urban rail construction. Background technique [0002] Reasonable determination of longitudinal stiffness of shield tunnel has an important influence on the safety of tunnel structure, and is an important content in the design of shield tunnel structure. More than ten years ago, the issue of longitudinal design was raised in the structural design of shield tunnels at home and abroad, but there was no clear regulation on how to carry out the relevant specifications for longitudinal design, and the longitudinal design of shield tunnels was still in the guidance of ideas. At the level, a complete and specific vertical design metho...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for determining the longitudinal bending stiffness of a shield tunnel to solve the problem that the longitudinal stiffness of the tunnel is difficult to determine when calculating the longitudinal deformation of the shield tunnel

The layout of existing tunnel deformation monitoring points, as well as the deformation monitoring frequency and monitoring accuracy must meet the requirements of the code

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