卡拉水电站左岸边坡稳定性数值模拟计算及分析.PDF

卡拉水电站左岸边坡稳定性数值模拟计算及分析 1 1 2 3 1 彭鹏 ，单治钢 ，李秀玲 ，巴刚 ，董育烦 （1.中国水电顾问集团华东勘测设计研究院，杭州，310014； 2.晋合投资管理（上海）有限公司，上海，20000；3.福建华东岩土工程有限公司，福州，350000 ） 摘要：结合AutoCAD 软件SLIP 语言和FLAC3D 内置FISH 语言的特点和优势，在FLAC3D 软件中开发边坡通 用建模程序。利用此程序对卡拉水电站坝址区左岸坝肩边坡进行三维建模,并计算分析了坝肩边坡的应力应变状 态，最后，通过强度折减法计算了边坡安全稳定系数，安全系数表明卡拉坝肩边坡稳定性较差。在稳定性分析中， 各参数的取值对计算结果存在一定程度的影响，因此进行了参数敏感性分析研究。分析结果表明工程区安全系数 对内摩擦角和内聚力的取值较为敏感，弹性模量敏感性较低。通过三维数值模拟计算结果与二维极限分析上限法 （EMU ）计算结果进行对比分析，两种方法的计算结果存在较好的一致性，可以互相验证，而边坡三维非线性有 限差分分析有利于更加直观、准确地评价边坡的稳定性。 Stability study of the left bank slope at Kala Hydropower Station 1 1 2 3 1 P. Peng , Z. Shan , X. Li , G. Ba , Y. Dong (1. Hydro China Hua-dong engineering Corporation, Hangzhou, 310000, China; 2. Jinghope Investment Management (Shanghai) Co., Ltd ., Shanghai, 20000, China 3. Fujian East China Geotechnical Project Limited Company, Nanchang, 330029, China) Abstract: The paper firstly presents a generic approach of model construction with FLAC3D for rock slope analysis, which directly uses AutoCAD drawings to build the model by using SLIP in CAD software and FISH language in FLAC3D. Secondly the paper describes the model construction process for the left bank slope at Kala Hydropower Station, as well as the stress and strain distributions generated by the model. Finally the factor-of-safety calculation results are presented, which indicate a relatively unstable condition of the slope. During the FOS calculation, a sensitivity study has been carried out to investigate the influence of rock mass properties on the slope stability. The results ind