Rigid block based lower bound limit analysis method for stability analysis of fractured rock mass considering rock bridge effects |
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| Institution: | 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan Univ., Wuhan, Hubei 430072, PR China;2. Department of Civil and Environmental Engineering, National University of Singapore, No. 21 Lower Kent Ridge Road, Singapore 119077, Singapore;1. SRK Consulting (Canada) Inc., Vancouver, BC V6E 3X2, Canada;2. Department of Earth Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada;1. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, 200092, China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China;3. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China;4. Department of Earth and Environmental Sciences, Università degli Studi di Milano–Bicocca, Milano, Italy |
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| Abstract: | A rigid block based lower bound limit analysis method for analyzing stability of fractured rock mass in 2D and 3D conditions is proposed. The rock bridge effects are considered in the general formation. No assumptions are imposed on the inter-element forces, and the solution obtained is statically admissible. The proposed method is theoretically rigorous and simple. The validation and efficiency of the proposed method have been demonstrated through three typical types of slopes, indicating that apart from the fractures, rock bridge plays a key role in stabilizing rock blocks, which should be greatly concerned in stability analysis of rock mass. |
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| Keywords: | Fractured rock mass Stability Rock bridge effect Lower bound Rigid blocks |
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