复杂地基上重力坝的破坏过程及稳定安全度研究  

Using Different Approaches to Study the Failure Mode and Stability of the Gravity Dam on Complex Foundation

作　　者：李征[1] 张林[1] 陈媛[1] 黄刚海[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室水利水电学院,成都610065

出　　处：《中国农村水利水电》2016年第2期130-133,138,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51379139;51409179)

摘　　要：复杂地基上重力坝的整体稳定一直备受关注。为了对复杂地基上重力坝整体稳定及破坏过程进行研究,对某水电枢纽典型坝段进行三维地质力学模型试验,采用超载法对该水电枢纽天然地基方案的典型坝段进行破坏试验。得到坝基的破坏过程及变形变位特点,并得出超载安全系数Kp=3.0。再结合有限元,采用综合法进行计算,所得综合安全系数Kc=2.5。模型试验和计算所得大坝破坏失稳过程相似,两者进行对照,相互验证确保工程稳定分析成果的准确性与可靠性,且研究成果可为类似问题中综合法的使用提供借鉴和参考。The overall stability of the gravity dam on complicated foundation has always been a great concern.In order to analyze the global stability and failure mode of the gravity dam on complicated foundation,this paper applies the method of three-dimensional geomechanical model test to the typical dam section of a certain water hinge which has complicated geological conditions and the problem of anti-sliding stability.And overloading method failure test is used for the scheme of natural foundation.By picturing the damage process of dam foundation,the distribution characteristics of deformation and failure form,obtain the overloading coefficient is3.0.Then considering the finite element,recalculate by the Synthetical Measure,obtain the synthetical coefficient is 2.5.The methods of model test and calculating lead to the similar dam failure instability process,as a solid proof of the accuracy and reliability of the engineering stability analysis results.The research methods and results can provide references for similar problems where the Synthetical Measure is applied.

关 键 词：重力坝 三维地质力学模型试验 破坏过程 超载法 

分 类 号：TV32[水利工程—水工结构工程]