Testing device for horizontally simulating stratum slurry permeation and soil body mechanical property change

Abstract

The invention relates to a testing device and method for horizontally simulating a layered stratum slurry permeation dynamic film forming process and measuring the time-space dynamic change of the mechanical property of a soil body during slurry permeation and the change of the microstructure of the soil body before and after slurry permeation. The device comprises a test transparent cylinder, a pressurizing mechanism, a soil body measuring mechanism, a scanning electron microscope and a supporting mechanism. The testing device and method can simulate the layered stratum in actual engineeringby adding different types of soil bodies, measure the time-space dynamic change of the soil pressure and the super-pore water pressure in the slurry permeation process and observe the layered stratumslurry permeation dynamic film forming process; and the testing device and method can eliminate the error caused by dead weight and improve the accuracy. The device can more intuitively and accuratelysimulate the dynamic film forming process of slurry permeating into the front stratum soil body, measures the mechanical property of the soil body during slurry permeation along with the time-space change and the change of the microstructure of the soil body before and after slurry permeation and provides the dynamic change rule of the slurry permeation for the actual engineering.

Description

technical field [0001] The invention relates to the technical field of underground engineering testing equipment, in particular to a horizontally simulated stratified stratum mud penetration and stratum soil mechanical property change testing device and method. Background technique [0002] With the rapid development of my country's underground engineering construction technology, no matter in the construction of highways or railway tunnels across rivers (rivers) and seas (lakes), urban rail transit tunnels, or municipal underground pipeline projects, mud-water balance shields and mud-water balance roofs Pipes have been widely used, and the common feature of both is that mud is injected into the front formation during construction, and the mud permeates and forms a dynamic film to maintain the stability of the excavation surface. At the same time, as the excavation depth of underground engineering continues to increase, there are natural sedimentary strata with different mech...

AI Technical Summary

Problems solved by technology

During the test process, the self-weight can easily lead to large errors in the test results, and there are layered strata on the excavation surface in the actual engineering construction. Therefore, the current indoor simulation test has certain defects in reflecting the actual construction.

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