三峡大坝抗滑稳定渗流—应力耦合反演分析  

Anti-sliding Stability Analysis of the Three Gorges Dam Through Seepage-Stress Coupling Inversion Analysis

作　　者：童广勤 张海龙 何军 黄书岭[2] 张雨霆[2] 董志宏[2] TONG Guang-qin;ZHANG Hai-long;HE Jun;HUANG Shu-ling;ZHANG Yu-ting;DONG Zhi-hong(Watershed Hub Operation and Management Center,China Three Gorges Corporation,Yichang 443100,China;Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]中国长江三峡集团有限公司流域枢纽运行管理中心,湖北宜昌443100 [2]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010

出　　处：《水电能源科学》2025年第1期132-136,共5页Water Resources and Power

基　　金：国家自然科学基金项目(U2340229);中国博士后科学基金面上项目(2023M730367);长江科学院创新团队项目(CKSF2021715/YT);中央级公益性科研院所基本科研业务费项目(CKSF2023316/YT)。

摘　　要：大坝处于高水头差下,保持其运行稳定至关重要。掌握大坝运行期抗滑稳定状态,是大坝安全定期检查的重要内容。基于三峡大坝14年运行期监测数据,采用渗流—应力耦合反分析,深入研究其控制性坝段运行期抗滑稳定性。采用各项异性渗流,反演获得了基岩渗透系数,并基于位移监测成果,进一步反演获得了基岩力学参数;再模拟分析了库水位上升对大坝及坝基稳定性的影响;通过有限元强度折减,分析了库水位上升后坝基的深层抗滑稳定性。结果表明,库水位上升后,大坝增量变形较小,坝基岩体及结构面仍处于弹性状态,大坝强度储备安全系数满足规范要求,大坝经过长期运行后其稳定性仍有保障。The dam is under high water head difference for long operation period,it is thus important to maintain its operation period stability.Based on the monitoring data of 14-year operation period of Three Gorges Dam,the seepage-stress coupling was applied to study the anti-slid stability of the control dam section.Firstly,the permeability coefficient of bedrock was obtained by an-isotropic seepage inversion analysis.Based on the displacement monitoring results,the in-version analysis was implemented to obtain the mechanical parameters of the bedrock.Then,the influence of the reser-voir water level rises on the stability of the dam and dam foundation was simulated.Moreover,the finite element strength reduction method was used to analyze the deep-layer anti-slide stability of the dam foundation after reservoir water level rising.The results show that after the reservoir water level rise,the incremental deformation of the dam is small and the bedrock joints are still in elastic state;The safety factor of the dam meets the requirements of the specifications.These indicates that the stability of the dam is still guaranteed after the long-term operation.

关 键 词：三峡大坝 抗滑稳定性 参数反演分析 渗流—应力耦合 运行期 

分 类 号：TV642.3[水利工程—水利水电工程]