Test device and method for determining dislocation interface seepage failure hydraulic gradient through unidirectional flow in-situ test

A hydraulic gradient and in-situ test technology, applied in the direction of measuring devices, mechanical devices, permeability/surface area analysis, etc., can solve the problems of result errors and other problems, achieve simple experimental process, good promotion and application value, test device and test The effect of simple process

Pending Publication Date: 2019-11-12
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology

However, in the test, the osmotic damage of the sample may occur when the water flow does not reach a steady state. If the steady flow Darcy formula is used to calculate the result at this time, there will be some errors in the results.

Method used

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  • Test device and method for determining dislocation interface seepage failure hydraulic gradient through unidirectional flow in-situ test
  • Test device and method for determining dislocation interface seepage failure hydraulic gradient through unidirectional flow in-situ test
  • Test device and method for determining dislocation interface seepage failure hydraulic gradient through unidirectional flow in-situ test

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 , figure 2 As shown, a kind of unidirectional flow in-situ test of the present invention determines the test device for seepage damage hydraulic gradient of the dislocation zone. A unidirectional flow test was performed. The in-situ sample 1 is selected at a suitable position on the wall of the main hole 18, branch holes 19 are opened on both sides of the sample position, and a connecting hole 20 is set at the inner end of the branch hole. In this way, the surrounding area of ​​the interlayer dislocation zone is separated from the original rock. The in-situ sample thickness of the interlayer dislocation zone is 0.15-0.3m, and a certain thickness of the original rock is reserved vertically, forming a seepage diameter of 2m, width of 1.5m, height 1.5m in situ sample.

[0033] The test device includes a water inlet cha...

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Abstract

The invention discloses a test device and method for determining dislocation interface seepage failure hydraulic gradient through unidirectional flow in-situ test. The disadvantage in the existing technical scheme of determining the dislocation interface seepage failure hydraulic gradient is overcome, and a method for determining the dislocation interface seepage failure hydraulic gradient according to an unstable slow formula analytic solution in the dislocation interface under a ladder boundary water level condition based on the unidirectional flow in-situ test device. The device comprises awater inlet bin, a water outlet bin, a piezometric tube, a pressure instrument and a water injection pressurizing device. The method comprises the following steps: selecting an appropriate test pointin field adit to form an in-situ test sample; developing the field test, recording the flow data and the failure omen time; acquiring dislocation interface seepage parameter based on the test data; and computing the dislocation interface seepage failure hydraulic gradient.

Description

technical field [0001] The present invention relates to a test device and method for in-situ test of unidirectional flow to determine seepage damage hydraulic gradient of dislocation zone, especially a method for on-site determination of critical hydraulic gradient and failure hydraulic gradient under unsteady flow state of dislocation zone test device and method. Background technique [0002] The dislocation zone mainly refers to the soft structural plane with a gentle dip angle formed in the hard rock formation due to the tectonic movement in the geological history period. The fault zone can be divided into interlayer fault zone and intralayer fault zone according to its development position. It exists widely in nature, and its scale is far larger than the size of rock mass engineering structures. It brings seepage control, rock Body stability issues and geological hazards. The basalts at the dam site of the Xiluodu Hydropower Station that has been built in the lower rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N19/00
CPCG01N15/0826G01N19/00
Inventor 石安池李思佳徐建荣周志芳唐鸣发郭巧娜
Owner POWERCHINA HUADONG ENG COPORATION LTD
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