Stress deformation indoor model test device for shield tunnel structures and method for mounting stress deformation indoor model test device

Abstract

An embodiment of the invention discloses a stress deformation indoor model test device for shield tunnel structures and a method for mounting the stress deformation indoor model test device. The stress deformation indoor model test device is characterized in that a tunnel model is positioned in a model groove, displacement meters and strain gauges are arranged on the tunnel model and are connectedwith a data acquisition instrument, and longitudinal and transverse deformation evolution conditions of the tunnel model after stress is applied to the tunnel model can be comprehensively monitored in real time; a soil layer is positioned around the tunnel model, and the properties of soil mass around real tunnels can be restored; a pressure device is positioned on the soil layer and is used forsimulating temporary pile-loading effects of earth surfaces. The stress deformation indoor model test device and the method have the advantages that the stress deformation indoor model test device isdesigned according to geometric similarity ratios and volume weight ratios of the actual tunnels, and accordingly the consistency of the stress deformation indoor model test device and prototype tunnels can be guaranteed; deformation evolution laws of the shield tunnel structures can be obtained by means of research on segment structure opening, slab staggering, bolt internal force, segment stressand convergence deformation conditions under simulated earth surface pile-loading conditions; damage degrees of segments under earth surface load can be evaluated on the basis of the deformation evolution laws, and reference can be provided to actual engineering.

Description

technical field [0001] The invention relates to the technical field of tunnel traffic simulation tests, in particular to an indoor model test device for stress deformation of a shield tunnel structure under the action of a temporary surface load. Background technique [0002] The model test research on the longitudinal and lateral deformation evolution mechanism of shield tunnel segments under temporary surface loading is usually carried out in the form of soil boxes, and the model is placed in the test soil medium. Due to the influence of factors such as water content in the rock and soil mass, it is difficult to collect data such as stress and strain during the model test; it is impossible to obtain the deformation evolution law of the shield tunnel structure and the damage degree of the segment under the surface load. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a model test device that can be used indoors to simula...

AI Technical Summary

Problems solved by technology

Due to the influence of factors such as water content in the rock and soil mass, it is difficult to collect data such as stress and strain during the model test; it is impossible to obtain the deformation evolution law of the shield tunnel structure and the damage degree of the segment under the surface load

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