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Hydrodynamic grouting test device simulating different filler gaps

A technology of grouting test and filling, which is applied in the field of geotechnical engineering, can solve the problems of inability to accurately reach the treatment position, inability to evaluate the water-stop effect, waste of material and man-hours, etc., to achieve light weight, save materials, improve accuracy and effect Effect

Pending Publication Date: 2017-01-18
北京市政路桥锐诚科技有限公司 +1
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AI Technical Summary

Problems solved by technology

[0002] In the current geotechnical engineering grouting method, after the grout is injected into the rock-soil layer under a certain pressure, the seepage of the grout depends largely on the hydrodynamic conditions and the distribution of cracks and pores in the rock-soil medium, and often cannot Accurately reach the treatment position, so that it is impossible to evaluate the effect of water stop after grouting, resulting in a large waste of materials and delays in working hours, and the effect of grouting is poor

Method used

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  • Hydrodynamic grouting test device simulating different filler gaps
  • Hydrodynamic grouting test device simulating different filler gaps
  • Hydrodynamic grouting test device simulating different filler gaps

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Embodiment

[0043] This test device is used to simulate the grouting under the dynamic water environment. The test model box is shown in the figure above. The grouting hole 6 is selected as the grouting hole, and the other small holes are used to measure the hole pressure. The two sides of the model box are respectively There are two 2cm long hollow grooves for water inlet and outlet and water pressure gauge. In this test, fine-grained quartz sand was used for experimental research. According to the geotechnical test specification, the indoor basic geotechnical test was carried out to obtain the physical property index of the test sand sample and the particle size distribution of the sand sample. See Table 1 and Table 2.

[0044] Table 1 Quartz sand density and void ratio

[0045]

[0046] Table 2 Particle size distribution table of 300g sample quartz sand test sand sample

[0047]

[0048] The grouting slurry used in the test was mixed with commercially available sodium bentonite ...

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Abstract

The invention discloses a hydrodynamic grouting test device simulating different filler gaps and belongs to the technical field of geotechnical engineering. The device is based on the research of the bentonite slurry diffusion rule in sandy soil filled gaps and experimental study on grouting and water plugging effects under the hydrodynamic condition. Grouting is performed under the condition that head pressure, water injection flow, grouting pressure and other parameters are set well, a specially made rubber pad is laid in a test model box, grouting pipes and pressure measuring devices are arranged at corresponding small holes, the outer end of the box is connected with a water injection device, a grouting device and a waste liquid collecting device, slurry preparation is performed, and grouting is performed after water injection is conducted on the device. According to the grouting method under the hydrodynamic condition, a one-dimensional grouting simulation test is performed, the pressure distribution situation during grouting in filled gaps under the seepage condition and the change rule of diffusion with slurry are researched, and the grouting efficiency is improved.

Description

technical field [0001] The invention relates to a dynamic water grouting test device for simulating cracks of different fillers, and belongs to the technical field of geotechnical engineering. Background technique [0002] In the current geotechnical engineering grouting method, after the grout is injected into the rock-soil layer under a certain pressure, the seepage of the grout depends largely on the hydrodynamic conditions and the distribution of cracks and pores in the rock-soil medium, and often cannot Accurately reach the treatment position, so that it is impossible to evaluate the effect of water stop after grouting, resulting in a large waste of materials and delays in working hours, and the effect of grouting is poor. Contents of the invention [0003] At present, there are few researches on the water-stop test of formation grouting under dynamic water conditions, and the purpose of the present invention is to provide a grouting method under dynamic water conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00G01N13/04
CPCG01N13/00G01N13/04G01N2013/003
Inventor 石银峰吴智勇周世生马瑞叶春琳张春发王贵和黄峰翟相飞高维兵蔡玮王志国梁红忠陈雅南王兴宝
Owner 北京市政路桥锐诚科技有限公司
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