Device and method for simulating the development of surrounding rock plastic zone and the mechanical response of fluid lining structures under different support forces

Abstract

The invention provides a device and a method for simulating the development of the plastic zone of the surrounding rock and the mechanical response of the fluid lining structure under different support forces. It includes a support force regulator, and the support force regulator includes two high-strength plates. The diagonal position of the high-strength board is connected by two vertically arranged stop bolts, the high-strength board on the top is fixed and installed on the top of the stop bolt by a screw disk, and the high-strength board on the bottom is supported by a force-bearing device, two symmetrically arranged high-strength segments are arranged inside the force-bearing device, and a spring damper is installed between the high-strength segment and the inner wall of the force-bearing device. This device records and observes the stress in different areas of the interior in real time through the internal stress sheet, and simulates and analyzes the plastic deformation of the surrounding rock under different support stresses through the CT scanning of the distribution of the density of the internal fluid filling and expansion agent. and stress distribution, making the simulation experiment more realistic and accurate.

Description

technical field [0001] The device relates to a device and method for simulating the development of the plastic zone of the surrounding rock and the mechanical response of the fluid lining structure under different support forces, and is mainly used in the research of engineering tunnels, engineering roadways and other fields. Background technique [0002] In recent years, with the rapid development of my country's national economy, the construction of expressway and national highways as the main body of the rapid transportation network has made rapid progress, and mountain road tunnels play an increasingly prominent role as an important part of expressways. For laboratory research, the existing tunnel simulation device is too large and extremely inconvenient to operate, and the existing tunnel simulation device only studies and analyzes the effect of lining support, and cannot analyze the impact of tunnel support on the tunnel surrounding rock and the impact on tunnel support...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device and method for simulating the development of the surrounding rock plastic zone and the mechanical response of the fluid lining structure under different support forces, aiming at the fact that the existing simulation device cannot analyze the influence of the tunnel support on the tunnel surrounding rock and the support structure itself ; and it is impossible to determine the development law of the plastic zone of the surrounding rock under the specified support stress, and the optimal fluid filling thickness in the process of inhibiting the large deformation of the soft rock in the tunnel; the device is independently developed, and the support force adjustment device of the device can simulate Under different support stresses of the tunnel, observe the compactness of the internal expansion mud and the numerical changes of the pressure sensor to determine the deformation law and stress distribution of the plastic zone of the surrounding rock under different support stresses; analyze the flow of different surrounding rock stresses The effect of quality filling lining structure on stress homogenization and load reduction, and the internal stress distribution

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