锦屏一级水电站左岸高边坡变形监测及稳定性分析  

Deformation monitoring and stability analysis of left bank highslope at Jinping I Hydropower Station

作　　者：梁靖 裴向军[1] 罗路广 刘明[1] 杨静熙 LIANG Jing;PEI Xiangjun;LUO Luguang;LIU Ming;YANG Jingxi(State Key Laboratory of Geo-Hazards Prevention and Geo-Environment Protection,Chengdu University of Technology,Chengdu 610059,Sichuan,China;PowerChina Chengdu Engineering Corporation Limited,Chengdu 610072,Sichuan,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《水利水电技术（中英文）》2021年第4期180-185,共6页Water Resources and Hydropower Engineering

基　　金：国家重点研发计划(2016YFC0401908);国家创新性集体基金(41521002);川藏铁路重大工程风险识别与对策研究项目(2019YFG0460)。

摘　　要：受复杂地质条件和高陡地形等因素影响,锦屏一级水电站左岸高边坡在水库蓄水运行阶段仍出现持续缓慢变形,其稳定性问题受到高度关注。为此,基于现场调查与最新监测结果数据,从监测反馈和地质角度揭示了边坡变形破坏特征及机制,并以此分析边坡稳定性。分析结果表明:左岸边坡的表观与深部累计位移变形仍呈现缓慢增长趋势,但历经变形调整后速率有一定减缓,可将变形机制归纳为“上部持续倾倒-深部张裂-表部锁固体松弛-下部与坝体协调”;目前左岸高边坡受库水位影响而变形仍未收敛,但变形较为平稳且无异常现象,满足安全控制标准;由于边坡长期变形发展趋势的影响因素复杂,尚存不确定性,仍需持续监测以及进一步研究。Under the influences from the factors,i.e.complicated geological condition,high-steep terrain,etc.,the continuous deformation of the left bank at Jinping I Hydropower Station still occurs during the impounding and operation phase,and then its stability is highly concerned.Therefore,the characteristics and mechanism of the deformation and failure of the slope are revealed herein from the aspects of the monitoring feedback and the geological condition therein based on the in situ investigation and the latest monitoring data,from which the slope stability is analyzed.The analysis result shows that the apparently and deeply accumulated displacement deformation of the left bank slope still exhibits a slowly increasing trend,but the deformation rate is slowed to a certain extent after experiencing the relevant deformation adjustment,while the deformation mechanism can be summarized as“continuous toppling of the upper part—deeply tension-cracking—surface locking solid body relaxation—the coordination between the lower part and the dam body”.At present,the deformation is still not converged under the influence of reservoir water,but it becomes relatively stable without any abnormal phenomena,thus can meet the relevant safety control standards.As the influencing factors of the long-term deformation development trend of the slope are complicated with some uncertainties,the relevant continuous monitoring and further study concerned are still necessary to be carried out.

关 键 词：锦屏一级水电站 高边坡 变形监测 稳定性分析 

分 类 号：TV223.13[水利工程—水工结构工程]