Indoor three-dimensional grouting model test servo control system and test method

Abstract

The invention discloses an indoor three-dimensional grouting model test servo control system and a test method. The system comprises two parts of a three-dimensional grouting model test device and a constant-pressure grouting-water supply combined servo control device. The three-dimensional grouting model test device comprises three counterforce boards. A confining pressure counterforce cavity is placed between the first counterforce board and the second counterforce board. An axial pressure servo loading module for applying the axial loading force to the confining pressure counterforce cavity is placed between the second counterforce board and the third counterforce board. A pore water pressure loading module is arranged at the bottom of the confining pressure counterforce cavity. A grouted rock mass loading module and a confining pressure servo loading module applying confining pressure to the confining pressure counterforce cavity are arranged in the confining pressure counterforce cavity. The constant-pressure grouting-water supply combined servo control device comprises a constant-pressure double-liquid grouting pneumatic servo control module and a constant-pressure water supply pneumatic servo control module. The constant-pressure double-liquid grouting pneumatic servo control module is communicated with the confining pressure counterforce cavity. The constant-pressure water supply pneumatic servo control module is connected with the pore water pressure loading module.

Description

technical field [0001] The invention discloses an indoor three-dimensional grouting model test servo control system and a test method. Background technique [0002] In the construction of underground projects such as mines and tunnels, problems such as large deformation of surrounding rocks and large amounts of water inflow often occur, and even water and mud inrush disasters may occur, causing huge loss of personnel and property. Grouting, as an effective means of strengthening weak surrounding rock and controlling water damage, has been more and more widely used in underground engineering disaster control. Model test is an important means to study the law of grout diffusion and reinforcement mechanism in the process of grouting treatment. However, there are currently few model test benches for tunnel excavation and grouting, which seriously affects the progress of related research. [0003] In terms of grouting model tests, most studies are carried out on specific format...

AI Technical Summary

Problems solved by technology

At present, there is no grouting device specially used for indoor grouting simulation tests in China. The grouting model tests mostly use engineering grouting pumps. The large flow and high pressure cannot monitor and adjust the grouting parameters in real time, which is different from the grouting required by the model test. System mismatch severely restricts the development of grouting model tests, which in turn affects the research on grouting theory

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