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Evaluation method of shear strength of rock structural surface with anisotropic characteristics

An anisotropic and shear strength technology, applied in the direction of using a stable shear force to test the strength of the material, and using a stable tension/pressure test to test the strength of the material, etc. The effect of fast and accurate shear strength

Inactive Publication Date: 2016-04-06
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology

However, this method still cannot reflect the characteristic of the undulation amplitude of the structural plane.

Method used

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  • Evaluation method of shear strength of rock structural surface with anisotropic characteristics
  • Evaluation method of shear strength of rock structural surface with anisotropic characteristics
  • Evaluation method of shear strength of rock structural surface with anisotropic characteristics

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0043] See figure 1 It is a flow chart of shear strength assessment considering the anisotropic characteristics of rock mass discontinuities.

[0044] (1) Acquisition of three-dimensional shape information data of structural surface

[0045] The ShapeMetriX3D system was used to obtain the structural surface morphology information data. This system is a set of three-dimensional non-contact photogrammetry system for geometric parameters of rock mass developed by Startup Company in Austria. It can measure the undulation height of rock structural planes, so as to obtain three-dimensional spatial coordinate data of rock structural planes.

[0046] The system is used to collect the three-dimensional shape data information of the structural surface of the cement mortar specimen, and the collected data is saved in Excel in the form of a matrix for the next step of calculation and analysis.

[0047] (2) Calculation of structural surface roughness parameters SRv and A

[0048] accord...

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Abstract

The present invention relates to evaluation method of shear strength of a rock structural surface with anisotropic characteristics. The method comprises the steps of: (1) acquiring three-dimensional morphology data of the rock structural surface; (2) calculating an anisotropic characteristic parameter SRv and a relief intensity parameter A of the structural surface, and expressing roughness in each direction of the three-dimensional rock structural surface by using the parameters SRv and A; (3) testing the wall strength JCS and basic friction angle of rock structural surfaces of the same type; and (4) substituting the structural surface parameters obtained in the steps (2) and (3) into a formula shown as below to obtain the peak shear strengths under different direct stress. The present invention focuses on the anisotropic characteristics of structural surface, overcomes the defect of artificial valuation of roughness coefficient JRC in Barton formula and realizes quick and accurate evaluation of shear strength of the rock structural surface on all directions.

Description

technical field [0001] The invention provides a new method for evaluating the shear strength of rock structural planes, which belongs to the field of rock mechanics. Background technique [0002] Natural rock structural plane is an extremely complex geological interface, and its peak shear strength has always been a research hotspot in the field of rock mechanics. In the past half a century, scholars at home and abroad have carried out research work on the mechanical properties of shear strength around the quantitative characterization of structural surface roughness, and achieved fruitful results. For example, Patton proposed the dilation and shear effect bilinear strength formula (PATTONFD. Multiple model of shear failure in rock [C] / / . Proceeding of the First Congress of International Society of Rock Mechanics. Lisbon, 1966: 509-513); Jaeger proposed the shear strength of the dilation effect gradually transitioning to the shear effect model (JAEGERJC. Friction of Rocks a...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/08
CPCG01N3/08G01N3/24
Inventor 陈世江王创业王超张金山
Owner INNER MONGOLIA UNIV OF SCI & TECH
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