DIRECT SHEAR STRENGTH BEHAVIOR OF ROCK MASS CONTAINING COPLANAR CLOSE INTERMITTENT JOINTS

HU Bo; YANG Zhirong; LIU Shungui; WANG Sijing; LIU Haining

Volume 16 Issue 3

Oct. 2010

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HU Bo, YANG Zhirong, LIU Shungui, WANG Sijing, LIU Haining. 2008: DIRECT SHEAR STRENGTH BEHAVIOR OF ROCK MASS CONTAINING COPLANAR CLOSE INTERMITTENT JOINTS. JOURNAL OF ENGINEERING GEOLOGY, 16(3): 327-331.

Citation:

HU Bo, YANG Zhirong, LIU Shungui, WANG Sijing, LIU Haining. 2008: DIRECT SHEAR STRENGTH BEHAVIOR OF ROCK MASS CONTAINING COPLANAR CLOSE INTERMITTENT JOINTS. JOURNAL OF ENGINEERING GEOLOGY, 16(3): 327-331.

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DIRECT SHEAR STRENGTH BEHAVIOR OF ROCK MASS CONTAINING COPLANAR CLOSE INTERMITTENT JOINTS

1.
Key Lab of Engineering Geo-mechanics, Chinese Academy of Sciences, Beijing 100029;
2.
Traffic Bureau of Tanghai, Tanghai 063200;
3.
Jiangsu Transportation Research Institute, Nanjing 210017

Funds:

Received Date: 2007-06-20
Rev Recd Date: 2007-07-30
Publish Date: 2008-06-30

Abstract

Abstract

The shear strength mechanisms of joint and rock bridge are analyzed in this paper. Though introducing deformation compatibility equation in normal direction, the direct shear strength formulation is deducted based on the Mohr-Coulomb theory. According to the model test, tensile-shear complex failure is the main failure mode on the shear plane. Many tensile micro-cracks are formed in the test sample. There are five typical stages in the failure process. They are the linear elastic increment, the slippage of the joints, the steady development of post-cracking, the coalescence failure of discontinuous joints and the residual strength. The theoretical calculated results coincide well with experimental results.
- Intermittent joint,
- Rock bridge,
- Direct shear strength,
- Failure mode,
- Complete stress-strain curve

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References(1)

References

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