白鹤滩坝肩边坡施工期变形规律与控制因素分析  

An Analysis of Deformation and Control Factors of Baihetan Abutment Slope during the Construction Period

作　　者：谭尧升 陈文夫 王克祥 罗贯军 徐李达 荣冠[3] TAN Yao-sheng;CHEN Wen-fu;WANG Ke-xiang;LUO Guan-jun;XU Li-da;RONG Guan(China Three Gorges Group Corporation,Beijing 100038,China;China Three Gorges Construction Engineering Corporation,Chengdu 610041,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国长江三峡集团有限公司,北京100038 [2]中国三峡建工(集团)有限公司,成都610041 [3]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《中国农村水利水电》2022年第4期193-200,共8页China Rural Water and Hydropower

基　　金：白鹤滩大坝全过程三维渗流场模型构建与库水-坝基-结构动态耦合仿真研究(BHT/0811)

摘　　要：白鹤滩坝址区地质构造条件复杂,岩体卸荷作用较强,且发育有断层、错动带、深部裂缝等软弱结构面。在施工期间,人为活动会破坏两岸高陡边坡的稳定性,影响大坝长期安全稳定运行。结合白鹤滩地质条件对施工期坝肩边坡的监测资料进行分析,研究左右岸坝肩不同高程区间边坡的变形机理。基于对白鹤滩坝址区工程地质资料的整理分析,构建三维有限元边坡模型,借助FLAC3D有限差分软件对边坡开挖和支护以及筑坝全过程进行数值模拟计算,以监测资料验证了数值模拟计算成果的合理性,然后根据数值模拟计算结果并结合现场边坡变形监测数据,深入研究大坝两岸高陡边坡的变形演化规律,掌握边坡变形的控制因素。监测资料和数值模拟成果所反映的边坡变形规律是一致的且均表明左右岸坝肩边坡施工期是稳定的。Baihetan Dam Site is characterized by complex geological and structural conditions. The unloading effect of rock mass is strong and the number of faults,dislocation zones,deep fractures and other weak structural planes develops there. During the construction period,human activities have seriously damaged the stability of the high and steep slope,and affect the long-term safe and stable operation of the dam.Combined with the geological materials,this paper analyzes the monitoring data of the abutment slope during the construction period and studies the law of the slope deformation in different elevations of the abutment on both banks. Based on geological data,a three-dimensional finite element model of slope is built,and numerical simulation is carried out by FLAC3D software during slope excavation and support. The rationality of the numerical simulation results is verified by monitor data,and then the dam deformation law of the high and steep slope on both sides is studied according to the results of numerical simulation and in combination with monitoring data. The results show that both sides of the abutment slope is stable during the construction period.

关 键 词：白鹤滩拱坝 边坡变形规律 变形监测 控制因素 

分 类 号：TV61[水利工程—水利水电工程]