A Subway Tunnel Settlement and Deformation Monitoring Method Based on Adaptive Quadratic Integral

Abstract

The invention discloses a method for monitoring settlement deformation of subway tunnels based on self-adaptive twice-integration. The method comprises 1, according to the boundary conditions, constructing a twice-integration formula of a settlement deformation amount related to strain and location points and calculating a correction factor according to the twice-integration formula, 2, accordingto the strain of the verification position point, through the twice-integration formula, calculating the settlement deformation amount of the verification position point, comparing the settlement deformation amount and a practical settlement deformation amount of the verification position point and calculating deformation amount offset of the verification position point, 3, comparing the deformation amount offset of the verification position point and an allowable error, if the deformation amount offset of the verification position point is in the allowable error range, stopping calculation and executing the step 4, and if the deformation amount offset of the verification position point is not in the allowable error range, correcting the strain in the twice-integration formula in the step1 according to the correction factor and repeating the step 2, and 4, according to the corrected strain, through the twice-integration formula, calculating the settlement deformation amount of the monitored position point. Through correction of the integral error with the measured deformation amount at the verification position point, the error of the traditional twice-integration method is reduced.

Description

technical field [0001] The invention relates to a method for monitoring settlement and deformation of a subway tunnel, in particular to a method for monitoring settlement and deformation of a subway tunnel based on adaptive quadratic integration. Background technique [0002] With the development of engineering measurement technology, electronic instrument technology, and information technology, the theory and method of subway tunnel deformation monitoring have also achieved great development. In recent years, scholars have devoted themselves to finding the transformation relationship between strain and deformation, and to exploring methods and methods for indirect monitoring of structural deformation of shield tunnels. At present, the most widely used method is the strain quadratic integration method. Since the quadratic integral method is a relatively classic method in mechanics to calculate structural deformation, it can be used in a wide range and in many fields. Howeve...

AI Technical Summary

Problems solved by technology

However, this method does not introduce approximation and simplification conditions. In essence, it is only the discretization and differential operation of the integral formula

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