Device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces

Abstract

The invention provides a device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces. The device comprises a supporting force regulator, the supporting force regulator comprises two high-strength plates, opposite angle positions of the high-strength plates are connected through two vertically arranged limiting anchor rods; the high-strength plate at the top is fixedly arranged at the top of the limiting anchor rods through screw discs; a force-bearing device is supported on the high-strength plate at a bottom layer; two symmetrically arranged high-strength duct pieces are arranged in the force-bearing device; and spring dampers are arranged between the high-strength duct pieces and the force-bearing device. Stress pieces at the internal are used for performing real-time recording and observation on the stresses of at different regions at the internal, and the plastic deformation and stress distribution condition of the surrounding rock under different supporting stresses are simulated by scanning the compactness distribution condition of the internal fluid filler and swelling agent through CT scanning, so that the simulation experiment is more real 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...

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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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