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Method and system for testing rock permeability in dynamic load disturbance process

A test system and test method technology, applied in the field of geotechnical engineering, can solve problems such as single stress state and cannot reflect the safety of underground engineering, and achieve the effect of improving the single stress state

Pending Publication Date: 2019-05-14
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a rock permeability test method and its test system in the process of dynamic load disturbance, so as to solve the problem that the stress state of the rock sample in the prior art is single, which cannot reflect the safety of underground engineering under the joint action of dynamic load and water pressure. sexual technical issues

Method used

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  • Method and system for testing rock permeability in dynamic load disturbance process
  • Method and system for testing rock permeability in dynamic load disturbance process
  • Method and system for testing rock permeability in dynamic load disturbance process

Examples

Experimental program
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Embodiment 1

[0050] The present embodiment provides the rock permeability testing method of the dynamic load disturbance process including:

[0051] Selecting samples: screening qualified rock samples;

[0052] Saturated sample: Soak the rock sample in water to saturate the rock sample;

[0053] Applying confining pressure: along the circumferential direction of the rock sample, apply the confining pressure required for the test to the rock sample;

[0054] Apply dynamic load: along the axial direction of the rock sample, apply the dynamic load required for the test to the rock sample;

[0055] Apply liquid pressure: send liquid to one end of the rock sample along the axial direction of the rock sample, so that one end of the rock sample is subjected to liquid pressure, and the liquid pressure difference between the two ends of the rock sample is equal to the penetration pressure required for the test;

[0056] Calculation of permeability: While applying dynamic load and liquid pressure,...

Embodiment 2

[0090] like Figure 3-4 As shown, the rock permeability testing system provided in this embodiment includes a confining pressure chamber 1, a confining pressure loading device 2, a dynamic loading device 3 and a pore pressure loading device 4, the confining pressure chamber 1 is hollow, and the confining pressure chamber 1 is used to hold Rock sample 10. The confining pressure loading device 2 is connected to the confining pressure chamber 1 , and the confining pressure loading device 2 is used to apply confining pressure to the rock sample 10 through the confining pressure chamber 1 along the circumference of the rock sample 10 .

[0091] Wherein, the dynamic loading device 3 abuts against the confining pressure chamber 1 , and the dynamic loading device 3 is used to apply a dynamic load to the rock sample 10 through the confining pressure chamber 1 along the axial direction of the rock sample 10 . The pore pressure loading device 4 includes a pipeline and a hydraulic pump. ...

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Abstract

The invention provides a method and system for testing the rock permeability in a dynamic load disturbance process, and belongs to the technical field of geotechnical engineering. The method for testing the rock permeability in the dynamic load disturbance process comprises the steps of: selecting a sample, saturating the sample, applying confining pressure, applying dynamic load, applying hydraulic pressure, and calculating the permeability. The test system comprises a confining pressure chamber, a confining pressure loading device, a power loading device and a pore pressure loading device; the confining pressure chamber is hollow; the confining pressure loading device is connected with the confining pressure chamber; the power loading device and the confining pressure chamber are in abutting joint; the power loading device is used for applying dynamic load onto a rock sample along the axial direction of the rock sample; the pore pressure loading device comprises a pipeline and a hydraulic pump; the pipeline is separately communicated with the hydraulic pump and the confining pressure chamber; and the hydraulic pump is used for pumping liquid to the end part of the rock sample. Bymeans of the method and the system in the invention, the technical problems that the stress state of the rock sample is single and the security of underground engineering under the combined action ofdynamic load and water pressure cannot be reflected in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for testing rock permeability during a dynamic load disturbance process and a testing system thereof. Background technique [0002] With the rapid development of my country's economy, underground engineering construction in the fields of transportation, water conservancy and hydropower has achieved unprecedented development. The terrain and geological conditions encountered in the operation of underground engineering are becoming more and more complex, and the engineering disasters they face are becoming more and more challenging. , the threat of groundwater is particularly prominent, and groundwater will destroy the stability of underground engineering. In order to accurately evaluate the impact of groundwater on underground engineering, it is necessary to measure the permeability of underground rocks. [0003] In the operation stage of underground engin...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 周辉史林肯卢景景高阳涂洪亮
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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