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Mud-containing fault material test piece strength parameter and water rock coupling weakening testing method

A technology of water-rock coupling and test method, applied in the direction of applying stable tension/pressure to test material strength, strength characteristics, preparation of test samples, etc., can solve the problems of weakening of strength and deformation parameters, and achieve the effect of reducing disturbance

Inactive Publication Date: 2019-11-01
SICHUAN UNIV
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Problems solved by technology

[0006] However, these studies mainly focus on the permeability characteristics of rock mass under different stress conditions, but there are no experimental results on the weakening of rock and fault material strength and deformation parameters by water pressure.

Method used

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  • Mud-containing fault material test piece strength parameter and water rock coupling weakening testing method
  • Mud-containing fault material test piece strength parameter and water rock coupling weakening testing method
  • Mud-containing fault material test piece strength parameter and water rock coupling weakening testing method

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example

[0060] The instance loading process is as follows:

[0061] a. Add a confining pressure of 5MPa to fully consolidate the specimen, subject to the fact that the volume displacement is basically unchanged; (the second specimen is loaded with a confining pressure of 6.25MPa, the third specimen is loaded with a confining pressure of 7.5Mpa, the fourth The first test piece is loaded with a confining pressure of 8.75Mpa, and the fifth test piece is loaded with a confining pressure of 10.0MPa), and then the following test steps are carried out successively;

[0062] b. Add axial pressure to do triaxial compression failure test in natural state, the loading rate is 1mm / min, the purpose is to obtain the mechanical properties of natural state;

[0063] c. Add pore pressure (dynamic water pressure, water pressure at one end is 1Mpa, the other end is 0Mpa, and the pressure difference is 1MPa), so that the sample is fully saturated. When the pressure difference between the two ends of the ...

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Abstract

The invention discloses a mud-containing fault material test piece strength parameter and water rock coupling weakening testing method and relates to the field of mechanical properties of rock masses.In the test method, a test sample is sampled first and then prepared, and a test is carried out according to the following steps: S1. taking several test samples, and applying different confining pressure on the test samples; S2. respectively applying an axial pressure on the test samples in S1, and carrying out a triaxial compression destruction test in a natural state; S3. applying a hole pressure to the test samples in S2, and separately carrying out a triaxial compression destruction test for the test samples; and S4. recording the peak strength, axial strain and lateral strain during destruction of the tests, and calculating a strength parameter and a weakening rate. The purpose of the invention is to propose a whole set of methods to quantitatively reveal the water-rock coupling weakening effect of a fault material of a high arch dam abutment, so as to provide a basis for the evaluation of the overall stability of a high arch dam project. At the same time, this method is suitable for simulating the water-rock coupling weakening effect of a fault material of a dam abutment and a dam foundation, and the method is also suitable for analyzing a water-rock coupling test of a fault material of a deep buried tunnel and a high slope.

Description

technical field [0001] The invention relates to the field of geographic information processing, in particular to a test method for coupling weakening of strength parameters of mud-bearing fault material and water-rock coupling. Background technique [0002] The impoundment operation of water conservancy projects has formed artificial water surfaces, changed the groundwater supply and discharge conditions in the dam site area and reservoir area, and formed groundwater seepage fields under artificial interference, especially the Jinping I, Xiluodu, Xiaowan, In the high dam reservoirs formed by high arch dams such as Dagangshan, the interaction of seepage field and stress field makes the water-rock coupling phenomenon remarkable. Therefore, obtaining fault material strength parameters and simulating the impact parameters of water-rock coupling weakening on structures is of great significance for the study of structures such as dams. [0003] The research on this water-rock cou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/12G01N1/28
CPCG01N1/28G01N3/08G01N3/12G01N2203/0003G01N2203/0012G01N2203/0019G01N2203/0048
Inventor 杨宝全陈媛刘建锋陈建叶董建华张林徐慧宁罗敏刘子安张芮瑜
Owner SICHUAN UNIV
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