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A method for obtaining the retention rate of slurry and the test system used therein

A test system and retention rate technology, applied to a method of retention rate and the field of the test system used, can solve problems such as failure to seal fissures and reinforce rock mass, achieve simple and easy operation and calculation, reduce errors, and ensure operation. The effect of the condition

Active Publication Date: 2017-12-26
TONGJI UNIV
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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

Method used

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  • A method for obtaining the retention rate of slurry and the test system used therein
  • A method for obtaining the retention rate of slurry and the test system used therein

Examples

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Embodiment 1

[0035] A method for obtaining the retention rate of the slurry, comprising the steps of:

[0036] First simulate the grouting crack and adjust it to a horizontal state, inject the grout, then adjust the water pressure and flow rate, and conduct electronic imaging after the dynamic water hits the grout, and finally detect and analyze the total amount of grout in the crack before and after the dynamic water washes away the grout, To obtain the retention rate of the slurry.

[0037] The retention rate of the slurry is to import the photos obtained by electronic imaging into the computer for analysis, take photos before and after the test, use the pixel value of the image to distinguish the serous and non-serous areas, binarize the images, and count the serous areas The number of pixels and then calculate the volume of the slurry before and after the dynamic water injection, and then calculate the retention rate of the slurry.

[0038] The retention rate of described slurry, its ...

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Abstract

The invention discloses a method for obtaining the retention rate of grout: firstly, simulating the grouting crack and adjusting it to a horizontal state, injecting the grout, then adjusting the water pressure and flow rate, performing electronic imaging after the dynamic water hits the grout, and finally detecting and Analyze the total amount of slurry in the cracks before and after the slurry is washed away by dynamic water to obtain the retention rate of the slurry. The present invention also discloses a test system used in the method for obtaining the retention rate of the grout, including a test device, a dynamic water system, and a monitoring and analysis system; the test device is a device for carrying out a model test of the water flushing resistance of the grout; The dynamic water system is used to adjust the water pressure and flow rate; the monitoring and analysis system is used to detect and analyze the total amount of slurry in the cracks before and after the slurry is dispersed by the dynamic water to obtain the retention rate of the slurry. The test system provided by the invention has the advantages of simple operation and accurate calculation, and is beneficial for analyzing and researching the performance of resisting water scour 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00
Inventor 杨坪高书文秦浩张诗杭张瑞城薛丹璇
Owner TONGJI UNIV
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