Loose body permeation grouting simulating testing device

Abstract

The invention discloses a loose body permeation grouting simulating testing device. A grouting system comprises a grouting pump, a grout storing tank and a grouting pipeline, wherein the grouting pumpis used for conveying grout in the grout storing tank to a peripheral pressure loading system; the peripheral pressure loading system comprises a double-rubber-sleeve peripheral pressure loader and amanual peripheral pressure pump; an outer water bag rubber sleeve is connected to the peripheral pressure pump, so that a peripheral pressure environment is created; an inner flap membrane rubber sleeve wraps a loose medium; a monitoring system comprises a monitoring host, a pressure pump sensor, a grouting port pressure sensor, a peripheral pressure sensor and a resistivity sensing element. According to the loose body permeation grouting simulating testing device, the flap membrane rubber sleeve wraps a loose body, and the water bag rubber sleeve is used for pressurizing the loose body so asto simulate a ground stress environment; the pressure of a constant-pressure peripheral pressure pump and the grouting pump is adjusted until the peripheral pressure is beyond the grouting pressure,and thus the loose body permeation grouting process can be simulated; after the grouting is finished, the solidified loose body wrapped with the flap membrane rubber sleeve can be completely removed for study. The method is convenient to operate; and the obtained test result has directive significance on actual engineering design.

Description

technical field [0001] The invention relates to a loose body seepage grouting simulation test device, which is suitable for laboratory simulation of loose body seepage grouting. Background technique [0002] Infiltration grouting of loose bodies is a common problem in geotechnical engineering. The law of grout diffusion during grouting and the mechanical properties of loose bodies after grouting are the key to the practice of grouting reinforcement of loose bodies. During on-site construction, loose bodies are mostly in a certain in-situ stress field, especially in deep geotechnical engineering. Therefore, it is of great significance to realize the simulation of loose body grouting test laboratory for actual loose body grouting projects. [0003] However, the existing laboratory loose body grouting simulation test devices mostly use filling grouting tests, which cannot reproduce the in-situ stress environment, and the analysis process of the loose body consolidation form aft...

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Problems solved by technology

[0003] However, the existing laboratory loose body grouting simulation test devices mostly use filling grouting tests, which cannot reproduce the in-situ stress environment, and the analysis process of the loose body consolidation form after grouting consolidation is also very difficult

For example, a grouting simulation test device and its test method disclosed in Chinese patent CN105527384A have the problems of being unable to apply ground stress, monitoring the grout diffusion process, and being inconvenient to take out the grouting reinforcement loose body

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