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Test method for simulating gravel stratum grouting diffusion radius under flowing water environment

A technology of diffusion radius and test method, which is applied in the field of grouting material performance testing equipment, can solve the problems that the medium filling device cannot be opened, grouting materials, and coarse particles such as cement cannot be used, so as to achieve high accuracy of grout diffusion parameters, reduce Small design error, good stability in dynamic water environment

Inactive Publication Date: 2019-01-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology represented by the above-mentioned patent documents has the following defects: the medium filling device cannot be opened, and the diffusion of the slurry on the surface of the medium can only be observed through the side wall, but the diffusion characteristics of the slurry inside the medium cannot be obtained; the device can only realize Simulation of ultra-fine grouting materials, coarse-grained grouting materials such as cement cannot be used
The sensors are only arranged at equal intervals in the vertical direction, but cannot obtain the pressure in the axial diffusion range of the grout; there is no overflow port on the periphery of the device, which cannot simulate the actual formation pressure of the grouting body

Method used

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  • Test method for simulating gravel stratum grouting diffusion radius under flowing water environment
  • Test method for simulating gravel stratum grouting diffusion radius under flowing water environment
  • Test method for simulating gravel stratum grouting diffusion radius under flowing water environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A test method for simulating the diffusion radius of grouting in gravel formations under dynamic water environment, comprising the following steps:

[0048] a, collect the gravel sample on site, and fill it into the stainless steel box 2 of the test device in multiple layers, and control the filling thickness through the telescopic screw 11 and the sand retaining plate 10;

[0049] b. Insert the grouting pipe 14 and the water injection pipe 15 vertically into the gravel sample respectively, and adjust the overflow pressure of the overflow valve 18 according to the simulated formation stress value;

[0050] c. Turn on the grouting pump 3 and the water injection pump 4 respectively, apply the grouting pressure until the pressure reaches the set value, the grouting slurry enters the gravel sample through the grouting pipe 14, apply the water injection pressure until the water pressure reaches the set value, the water Enter the gravel sample through the water injection pipe...

Embodiment 2

[0055] A test method for simulating the diffusion radius of grouting in gravel formations under dynamic water environment, comprising the following steps:

[0056] a, collect the gravel sample on site, and fill it into the stainless steel box 2 of the test device in multiple layers, and control the filling thickness through the telescopic screw 11 and the sand retaining plate 10;

[0057] b. Insert the grouting pipe 14 and the water injection pipe 15 vertically into the gravel sample respectively, and adjust the overflow pressure of the overflow valve 18 according to the simulated formation stress value;

[0058] c. Turn on the grouting pump 3 and the water injection pump 4 respectively, apply the grouting pressure until the pressure reaches the set value, the grouting slurry enters the gravel sample through the grouting pipe 14, apply the water injection pressure until the water pressure reaches the set value, the water Enter the gravel sample through the water injection pipe...

Embodiment 3

[0064] A test method for simulating the diffusion radius of grouting in gravel formations under dynamic water environment, comprising the following steps:

[0065] a, collect the gravel sample on site, and fill it into the stainless steel box 2 of the test device in multiple layers, and control the filling thickness through the telescopic screw 11 and the sand retaining plate 10;

[0066] b. Insert the grouting pipe 14 and the water injection pipe 15 vertically into the gravel sample respectively, and adjust the overflow pressure of the overflow valve 18 according to the simulated formation stress value;

[0067] c. Turn on the grouting pump 3 and the water injection pump 4 respectively, apply the grouting pressure until the pressure reaches the set value, the grouting slurry enters the gravel sample through the grouting pipe 14, apply the water injection pressure until the water pressure reaches the set value, the water Enter the gravel sample through the water injection pipe...

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Abstract

The invention discloses a test method for simulating gravel stratum grouting diffusion radius under flowing water environment, and belongs to the technical field of the grouting material performance test equipment. The method is characterized by comprising the following steps: a, collecting gravel samples at the field, and filling in a stainless steel tank body; b, vertically inserting a groutingpipe and a water injection pipe into the gravel sample, and adjusting overflow pressure of an overflow valve; c, respectively starting the grouting pump and the water injection pump; d, observing seepage characteristics of the grouting seriflux in the gravel samples; and e, taking out the gravel samples after the grouting is ended for 24 hours, observing diffusion characteristics of the grouting seriflux in the gravel samples, and measuring axial diffusion distance of the grouting seriflux in the gravel samples. The visual simulation of the diffusion process of the grouting seriflux in the gravel stratum under the flowing water environment is realized, the diffusion rule of the seriflux in the gravel stratum under the flowing water environment can be quantitatively described, and the testmethod has the features of being good in flowing water environment stability, and high in seriflux diffusion parameter accuracy.

Description

technical field [0001] The invention relates to the technical field of grouting material performance testing equipment, in particular to a test method for simulating the diffusion radius of grouting in gravel formations under dynamic water environment. Background technique [0002] After continuous development, grouting technology has made great progress, and gradually developed into a highly professional discipline. However, since the grouting project is a concealed project, the diffusion process of the grouting material in the formation is concealed, and the diffusion form of the grout is extremely complicated. Because it is difficult to obtain accurate grouting parameters, it brings certain difficulties to the grouting engineering design. Gravel strata are widely distributed in our country, and more and more underground projects come into contact with the gravel stratum, and the requirements for the utilization of the gravel stratum are getting higher and higher, and mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
CPCG01N13/04
Inventor 袁进科裴向军王文臣叶长文温继伟任和徐岗
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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