Three-dimensional stress fluid coupling grouting test system and method

Abstract

The invention provides a three-dimensional stress fluid coupling grouting test system and method. An upper pressing head, a lower pressing head, a left pressing head, a right pressing head, a front pressing head and a rear pressing head are movably connected with the upper part, the lower part, the left part, the right part, the front part and the rear part of a support frame respectively; grouting flow passages are formed in the upper pressing head, the left pressing head, the right pressing head, the front pressing head and the rear pressing head; the grouting flow passages are assembled and connected with grouting units; a water injection flow passage is formed in the lower pressing head; the water injection flow passage is assembled and connected with a water injection unit; inner sides of the upper pressing head, the lower pressing head, the left pressing head, the right pressing head, the front pressing head and the rear pressing head are assembled and connected with sealing rings. The three-dimensional stress fluid coupling grouting test system and method have the following benefits: three-dimensional stress and water pressure seepage are carried out on test pieces so as to simulate the coupling of three-dimensional stress shearing and seepage for rock mass structure surfaces; grouting is carried out on damaged test pieces so as to simulate the broken rock mass grouting process, and after the grouting, loading is carried out on the test pieces until the test pieces are damaged, so as to simulate the rock mass damage process after the grouting and obtain the attributes such as rock mass strength and the like after the grouting.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering tests, in particular to a three-way stress-seepage coupled grouting test system and method. Background technique [0002] Structural planes exist widely in rock mass, and the study of their mechanical properties has great theoretical and engineering significance. The existence of structural planes in the fractured rock mass affects the stability of the rock mass and threatens the safety of the project. Therefore, it is of great significance to study the mechanical properties of the structural planes after the rock mass is strengthened by grouting, and to reveal the essence and mechanism of grouting reinforcement. Many scholars at home and abroad have studied the shear stress-seepage coupling model of rock mass discontinuities, but they all have certain limitations and limited wide applicability. For the structural analysis of engineering rock mass, the structural plane of the roc...

AI Technical Summary

Problems solved by technology

The shear test of the rock mass structural plane is an effective method widely used by people to obtain the shear strength and parameters of the rock mass structural plane. It is generally divided into in-situ test and indoor model test. The former can obtain a more reliable The shear strength and parameters of the structural surface of rock mass, but the in-situ test is relatively seldom used due to the disadvantages of high test cost, long cycle, poor environment, and complicated operation; the latter has the advantages of low cost and simple operation compared with the former and is widely used. use

Images