Experimental study on a geo-mechanical model of a high arch dam |
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| Authors: | Wen-ping Fei Lin Zhang Ru Zhang |
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| Affiliation: | 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;3. Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA;4. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;1. Department of Civil, Environmental and Architectural Engineering, University of Colorado, ECCE 168, UBC 80309-0428, Boulder, CO, USA;2. Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, Canada M5B 2K3;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering Ministry of Education, Wuhan University, Wuhan 430072, China;3. Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA |
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| Abstract: | This paper presents the complete experimental study on the Geo-Mechanical Model of Jinping high arch dam to observe the deformation and study the stability of the dam abutment and foundations of the Jinping first stage hydropower project. The model considers various factors influencing the stability of dam abutment and foundation during the test, which includes overloading and strength-decreasing of weak structural planes in the rock mass of the dam foundation. A temperature-analogue material is employed to simulate the decreasing strength of the weak structural planes. The temperature-analogue material and model testing technique are developed for the first time. Secondly, the comprehensive method that considers both overloading and strength-decreasing is applied to the model successfully. Deformation characteristics, failure patterns and mechanisms of the dam abutment and foundation are achieved. The safety evaluation based on the experimental model indicates that the whole stability safety factor of the dam abutment and foundation is 4.7–5.0. |
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