Test apparatus for simulating stratum uplift in grouting process and test method of test apparatus

Abstract

The invention relates to a test apparatus for simulating stratum uplift in a grouting process and a test method of the test apparatus. The test apparatus comprises a test box, bearing plates arranged in the test box and dividing an inner cavity of the test box into a soil layer loading cavity and a pressurizing water cavity which are independent from each other, a water inlet control system and a high-pressure air adjusting system which are communicated with the pressurizing water cavity, a test soil layer arranged in the soil layer loading cavity, a grouting unit buried in the test soil layer and a grout control system connected with the grouting unit, wherein the soil layer loading cavity is communicated with the water inlet control system by virtue of a soil layer water inlet pipe, and a soil pressure gauge and a porous water pressure gauge are buried in the test soil layer. Compared with the prior art, the test apparatus is simple and compact in overall structure, economical and practical, applicable to the grouting simulation test under different filing conditions and different soil layer water content conditions, more convenient and rapider to assemble and operate, good in sealing effect, capable of accurately simulating the on-site grouting process and good in application prospect, and a grouting simulation effect is close the real situation.

Description

technical field [0001] The invention belongs to the technical field of underground engineering tests, and relates to a test device and a test method for simulating formation uplift in the process of grouting. Background technique [0002] In underground engineering, grouting is often used to uplift strata to compensate for surface settlement. So far, there is no theoretical model that can qualitatively analyze the grouting process. Therefore, empirical analysis is still the mainstream. The grouting mechanism is very complex and involves many factors. The formation uplift caused by grouting is related to the grouting pressure, grout material, grout diffusion law and the interaction between grout and soil. The simulation test is the most effective means to qualitatively analyze the mechanism of grouting process and formation uplift. [0003] In underground engineering, it is more and more common to use grouting to compensate for stratum subsidence and control stratum deformat...

AI Technical Summary

Problems solved by technology

The above-mentioned patent is to set a drainage port in the lower part of the device. During the grouting process, the pressure of the grouting cabin is always atmospheric pressure, so the grouting process under the high ground stress state of the deep stratum cannot be simulated; in addition, the device cannot measure the volume of the stratum during the grouting process Variety

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