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| The Determination of Shear Strength of Rock Discontinuity in Margin Balance Analysis of Cut Slope |
| FENG Zhi-Jun, LAI Zi-hui |
| The Second Survey & Design Institute of China Railway Chengdu, Sichuan 610031, China |
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Abstract Research purposes: In stability analysis of cut slope，the accurate determination of discontinuity shear strength is the base of the stability analysis and the design of retaining structure.
Research methods: Based on the research of Barton formula and combining with investigation on site s& laboratory test a new method to determine the roughness of discontinuity is put forward.
Research results: A parameter was introduced to determine the JCS which is an important parameter in Barton formula. Their mathematical relationship is fitted. The thickness of weak layer (flat layer) or filling degree (granulate layer) is introduced to determine the shear strength of weak rock layer.
Research Conclusions: Based on the correct determination of roughness, the estimated shear strength can be used to analyze the stability of slope. The method is easy, economic, fast, etc. and is more suitable in the field of highway & railway engineering.
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Received: 25 October 2006
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| [1] |
孙家驷.道路设计资料集·路基设计[M].北京:人民交通出版社,2002:140-145.
|
| [3] |
夏才初,孙宗欣.工程岩体节理力学[M].上海:同济大学出版社,2002:89-94.
|
| [4] |
黄润秋,张卓元,王士天.高边坡稳定性的系统工程地质研究[M].成都:成都科技大学出版社, 1991:104-109.
|
| [2] |
Barton N, Choubey V. The Shear Strength of Rock Joints in Theory and Practice[J]. Rock Mechanics, 1977(10):1-54.
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2006, Vol. 23 
