摘要
针对某混凝土重力坝坝基存在3层粘土软弱夹层可能引起坝基深层滑动问题,提出了有限元超载—折减综合法,利用ANSYS有限元分析软件构建了该坝溢流坝段深层抗滑稳定分析模型,通过关键点水平位移的变化判断坝基深层滑动失稳情况,进而求得坝基抗滑稳定安全系数介于3.00-3.25之间。与刚体极限平衡双斜面法及强度折减法、超载法相比,有限元超载—折减综合法所得抗滑稳定安全系数接近于前三者的平均值（3.02-3.32）,评价结果更偏于安全。
The finite element synthetic method of strength reducing and overload was used to study the stability issue against deep sliding of gravity dam foundation caused by three layers of soft clay.The ANSYS finite element analysis software was adopted to establish a certain reservoir spillway dam model for analyzing the dam stability against deep sliding.Through the horizontal displacement deformation of the key points,we can judge the stability circumstance against deep sliding of the dam foundation.Then it obtained the safety factor of gravity dam which was in the range of 3.00and3.25.Compared the results of the rigid limited equilibrium method,strength reduction method and overloaded method,the results by finite element synthetic method is close to the average of other three methods（3.02-3.32）and is more secure.
出处
《水电能源科学》
北大核心
2016年第2期65-68,共4页
Water Resources and Power
基金
山西省自然科学基金重点项目(2012011025-2)
关键词
混凝土重力坝
坝基深层滑动
有限元超载—折减综合法
超载法
强度折减法
安全系数
concrete gravity dam
stability against deep sliding of dam foundation
finite element synthetic method of strength reducing and overload
overloaded method
strength reduction method
safety factor
作者简介
王河（1990-）。男．硕士研究生，研究方向为水工结构工程，E-mail：wanghewanghe1990@126．com
通讯作者：李永刚（1958-），男，博士、教授、硕导，研究方向为水工结构工程，Email：1021466554@qq．com
