Evaluation of rock slope stability for Yujian River dam site China by block theory analyses

被引：0

作者：

Kulatilake, P.H.S.W. ^{[1
]}

Wang, L.Q. ^{[1
,2
]}

Tang, H.M. ^{[2
]}

Liang, Y. ^{[1
,2
]}

机构：

[1] Geological Engineering Program, Department of Materials Science and Engineering, University of Arizona, Tucson, AZ 85721, United States

[2] Faculty of Engineering, China University of Geosciences, Wuhan, Hubei province, China

来源：

45th US Rock Mechanics / Geomechanics Symposium | 2011年

关键词：

Fracture - Slope stability - Rocks - Lithology - Shear strength - Dams - Gravitation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Lithological information, rock mass fracture data and discontinuity shear strength obtained through field investigations have been used to conduct block theory analyses for the rock slopes that exist in the dam site to evaluate the stability of the slopes. The analyses were performed using mean discontinuity set orientations for each rock mass region under gravitational loading to calculate the maximum safe slope angles (MSSA) for different cut slope directions. The following conclusions have been made based on the block theory analysis results: (1) The final MSSA range between 30° and 47°, 44° and 70°, 47° and 69°for cut slope dip directions of 20°-30°, 105°-210°, and 270°-355°, respectively; (2) For cut slope dip directions of 105°-210° and 270°-355°, wide ranges of values have been obtained for the final MSSA reflecting the influence of variability of fracture orientations on MSSA; (3) Apart from the region R-d-1 for slope dip directions in the range 20°-30°, rest of the regions at the dam site seem to be stable for slope angles less than 40°. © 2011 ARMA, American Rock Mechanics Association.

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