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| STABILITY EVALUATION AND REINFORCEMENT OF UNLOADING FISSURES IN RIGHT BANK OF DAGANGSHAN HYDROPOWER STATION |
| LI Manlin1，2，WEI Wei1，2，ZHANG Ronggui1，2 |
| (1. PowerChina Chengdu Engineering Corporation Limited，Chengdu，Sichuan 610072，China；2. High Concrete Dam Affiliation，National Hydropower Technology Research and Development Center，Chengdu，Sichuan 610072，China) |
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Abstract The topographical and geological condition of dam area of Dagangshan hydropower station is complex and the bank slope is steep. The well developed geological structures，unloading fissures，high earthquake intensity and complicated slope structures lead to the problem of stability of the high slope at the right bank. The potential sliding mode of the slope was studied in detail considering the site conditions of geology and construction. A synthetic scheme of reinforcing treatment was thus proposed and used for the belt with dense unloading fissures at the right bank slope. The stability analysis of slope was carried out with different numerical methods. The results indicate that the safety factor of the slope after the reinforcement meets the requirement of the control standard. At the same time，the data of in-situ monitoring indicate that the slope is stable and the scheme of reinforcing treatment is reasonable and effective.
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Received: 27 June 2014
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2014, Vol. 33 
