Method for obtaining retention rate of slurry, and test system used thereby

Abstract

The invention discloses a method for obtaining the retention rate of a slurry. The method comprises the following steps: simulating a grouting crack, adjusting the grouting crack to a horizontal state, injecting the slurry, adjusting the pressure and flow velocity of water, impacting the slurry with dynamic water, carrying out electron imaging, and detecting and analyzing the total amount of the slurry in the crack before and after the dispersion of the slurry by the dynamic water in order to obtain the retention rate of the slurry. The invention also discloses a test system used by the method for obtaining the retention rate of the slurry. The test system comprises a test device, a dynamic water and a monitoring analysis system; the test device is used for carrying out grouting slurry water dispersion resistance model test; the dynamic system is used for adjusting the pressure and flow velocity of water; and the monitoring analysis system is used for detecting and analyzing the total amount of the slurry in the crack before and after the dispersion of the slurry by the dynamic water in order to obtain the retention rate of the slurry. The test system provided by the invention has the advantages of simplicity, easy operation and accurate calculation, and is in favor of analyzing and researching the water dispersion resistance of different slurries under different dynamic water conditions.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a method for obtaining the retention rate of slurry and a test system used therein. Background technique [0002] Almost all rock masses have different degrees and different numbers of cracks and structural planes. These discontinuities destroy the integrity and continuity of the rock mass and weaken the strength of the rock mass. Therefore, it needs to be reinforced. In the method of reinforcement, grouting is a very good choice. Grouting is an effective means of strengthening weak and broken surrounding rocks and sealing groundwater in underground engineering. [0003] For grouting under dynamic water conditions, it is necessary to consider the retention of the grout. If the retention is poor, the grout will be washed away by the water during injection and flow to the distance with the water, which cannot achieve the effect of sealing cracks and strengthening roc...

AI Technical Summary

Problems solved by technology

[0003] For grouting under dynamic water conditions, it is necessary to consider the retention of the grout. If the retention is poor, the grout will be washed away by the water during injection and flow to the distance with the water, which cannot achieve the effect of sealing cracks and strengthening rock mass. ; so it is necessary to study the retention rate of grout in fractures under hydrodynamic conditions

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