Study on Rock Bolt Reinforcement for a Gravity Dam Foundation |
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| Authors: | S H Chen Z M Yang W M Wang I Shahrour |
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| Institution: | (1) The State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430072, China;(2) Hunan Province Hydro-Power Design Institute, Changsha, 410007, China;(3) Laboratoire Genie Civil et geo-Environnement (LGCgE), Lille University of Science and Technology, Cite Scientifique, 59656 Villeneuve D’Ascq, France |
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| Abstract: | In this article, the rock bolt reinforcement mechanism is discussed, and the gravity method as well as the finite element
method for the bolted rock is presented. These methods are applied to study the gravity dam foundation of the Xiaoxi Hydropower
Project, which is influenced by the presence of a large fault with a cracked zone over 180 m wide. Rock bolt reinforcement
was used to improve the stability of the dam foundation, and the reinforcement parameters were determined from a semi-empirical
equation controlled by in situ test. The stability analysis was conducted using the above methods, and the improvement in
terms of deformation and stress as well as stability of the dam foundation due to the reinforcement is assessed. Rock bolt
reinforcement was completed successfully, and the dam started normal operations in January 2008. |
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