Grouting model test device and method capable of loading ground stress and pore water pressure

Abstract

The invention discloses a grouting model test device capable of loading crustal stress and pore water pressure and a method thereof. The device comprises three pressure seal plates, a fixed screw and a cavity, wherein the pressure seal plates are sequentially connected into a whole structure through the fixed screw; the pressure seal plates respectively are a first pressure seal plate, a second pressure seal plate and a third pressure seal plate from top to bottom; a cavity for filling of a medium and simulating different geological conditions is fixed between the first pressure seal plate and the second pressure seal plate; the lower end of the cavity is connected with a scalable force column; the lower end of the scalable force column is connected with a tension and compression sensor; and a round force transmission plate is arranged at the lower end of the tension and compression sensor. Stable and long-term loading of crustal stress and pore water pressure in a miniature grouting model test is achieved, the condition that the model test condition is closer to the real underground environment is ensured, a plurality of geological conditions of tunnels and mines can be simulated, and the grouting model test device is wide in application range.

Description

technical field [0001] The invention relates to a grouting model test device capable of loading ground stress and pore water pressure and a method thereof. Background technique [0002] In recent years, underground projects such as tunnels and mines in my country have developed vigorously. However, during the construction process, water and mud inrush disasters have occurred from time to time. According to statistics, the frequency of water and mud inrush disasters ranks second in underground engineering accidents, causing a large number of accidents. casualties and economic losses. [0003] The grouting method has been an effective means to solve the problem of water and mud inrush disasters for more than 200 years, but at present, water and mud inrush disasters still occur frequently. Effective theoretical guidance is far from mature. [0004] The model test method can simulate complex geological structures more comprehensively and truly, and provide a basis for establish...

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Problems solved by technology

At present, a series of grouting model tests have been carried out in China, but due to the test conditions, it is impossible to restore the real force of the filling medium to the maximum extent, such as important mechanical parameters such as ground stress and pore water pressure, which makes the research results unable to be directly applied to Engineering practice, the development of grouting theory still lags behind

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