Test device and method for transverse isotropic permeability coefficient of layered rock mass

A transversely isotropic, permeability coefficient technology, applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc. It can accurately reflect the damage degree of rock mass and other problems, so as to achieve the effect of easy site use, simple operation and clear work flow.

Active Publication Date: 2018-07-06
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the test device for the permeability coefficient of layered rock mass is still used for the complete rock mass, which cannot reflect the influence of joints on the permeability of the rock mass, and cannot accurately and objectively reflect the degree of damage of the rock mass

Method used

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  • Test device and method for transverse isotropic permeability coefficient of layered rock mass
  • Test device and method for transverse isotropic permeability coefficient of layered rock mass
  • Test device and method for transverse isotropic permeability coefficient of layered rock mass

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1, the testing device for transversely isotropic permeability coefficient of layered rock mass, refer to the attached figure 1 .

[0043] The layered rock mass transversely isotropic permeability coefficient testing device of the present invention comprises a pressure vessel 1 for storing liquid, a gas tank 2 for storing inert gas and a closed test container 3 for placing layered rock mass samples , water is stored in the pressure vessel 1, nitrogen is housed in the gas tank 2, an inlet channel 4 is provided on one side of the airtight test container 3, and the inlet channel 4 is connected with the pressure vessel 1 and the gas tank 2 respectively through a communication pipe, and the other side of the airtight test container 3 A horizontal outlet 5 is provided on one side, and a vertical outlet 6 is provided on the upper and lower sides of the airtight test container. The two vertical outlets 6 and the horizontal outlet 5 are connected to the recovery contai...

Embodiment 2

[0045] Embodiment 2, the test method of laterally isotropic permeability coefficient of layered rock mass, refer to the attached Figure 2-3 .

[0046] The test method of the present embodiment uses the test device of embodiment 1, and comprises the following steps:

[0047] 1. Assemble rock samples.

[0048] Put the rock sample 18 containing layered joints into the airtight test container 3, the size of the rock sample 18 is 100mm×50mm, the direction of the joint 19 of the rock sample 18 is perpendicular to the entrance direction of the airtight test container 3, and the airtight test container 3 is in the vertical Two inlets and outlets are respectively arranged in the direction and the horizontal direction, and are respectively controlled by the first and second control switches.

[0049] 2. Gas permeability test in the direction perpendicular to the joint.

[0050] 2.1) Open the sixth control switch, close the fifth control switch, and control the permeation pressure at...

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Abstract

The invention provides a device for testing transverse isotropic permeability coefficients of stratified rock masses. The device comprises a pressure container, a gas tank and a closed test container. An inlet channel is arranged on one side of the closed test container, a horizontal outlet is formed in the other side of the closed test container, vertical outlets are formed in the upper side and the lower side of the closed test container, the vertical outlets and the horizontal outlet are connected to a recycling container, a second control switch is arranged at the inlet channel, a first pressure gauge is arranged on upstream of the second control switch, first control switches are arranged at the vertical outlets, a third control switch is arranged at the horizontal outlet, a fourth control switch is arranged at an inlet of the recycling container, and a second pressure gauge is arranged on upstream of the fourth control switch. The invention further provides a method for testing the transverse isotropic permeability coefficients of the stratified rock masses. The device and the method have the advantages that the permeability of two media including water and gas can be tested by the aid of the same device in the horizontal direction and the vertical direction, and accordingly the isotropic permeability of the stratified rock masses can be accurately tested.

Description

technical field [0001] The invention relates to a testing technology for isotropic permeability coefficient of rock mass in geotechnical engineering. Background technique [0002] Layered rock mass refers to sedimentary rocks with a relatively simple structure. The rock layers can be horizontal or steeply inclined, and the joints are usually parallel or approximately parallel. The rock layers can be consolidated rocks or unconsolidated accumulations. The deformation and failure characteristics of rock mass are mainly controlled by rock formations and structural planes. The rock mass in nature has a layered structure, which accounts for about 2 / 3 of the land area, accounting for 77.3% in my country. The extensive distribution of layered rock mass leads to a large number of layered rock mass stability problems in engineering construction. , These obvious layered structures make the mechanical characteristics of layered rock masses extremely complex. How to judge the stability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 刘宁张春生房敦敏潘文祥
Owner POWERCHINA HUADONG ENG COPORATION LTD
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