重力坝深层抗滑稳定三维地质力学模型破坏试验研究  

3D geo-mechanical model failure test on stability against deep sliding of gravity dam

作　　者：丁泽霖[1] 张林[1] 陈媛[1] 胡成秋[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,四川成都610065

出　　处：《水利学报》2011年第4期499-504,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金资助项目(50879050);国家重点基础研究发展计划(973)项目(2010CB226802);教育部博士点基金(20100181110077)

摘　　要：针对武都碾压混凝土重力坝4个典型坝段的坝基深层抗滑稳定问题,开展了重力坝天然地基条件下三维地质力学模型超载法破坏试验和加固地基条件下三维地质力学模型综合法破坏试验,得到了坝基的变形及其分布特点,以及模型的破坏过程和破坏形态,研究了加固处理前后坝与地基稳定安全问题。试验结果表明:武都重力坝16#～19#坝段在天然地基下存在深层滑动问题,在进行了以置换混凝土塞为主的加固处理后,有效地阻隔了断层破裂面的扩展和滑移通道的形成,使坝基的深层滑动稳定得到了良好的改善。In order to study the stability against deep sliding of four typical dam sections of Wudu RCC Gravity Dam, two 3D geomechanical model tests were conducted. One is overloading test to study the failure of original foundation and another is a comprehensive test to study the failure of reinforced foundation. Through the failure tests, the deformation distribution charactersistics, failure process and failure patterns of foundation were obtained, and the stability of dam and foundation before and after reinforcement were also studied. The test results show that the deep sliding problem exists in the original foundation of 16-19 dam sections. The faults can be effectively prevent from cracking, extending and forming sliding paths, if the prevention measure of using concrete replacement plug is adopted and the stability against deep sliding of foundation have been improved greatly.

关 键 词：碾压混凝土重力坝 地质力学模型试验 深层抗滑稳定 超载法试验 综合法试验 

分 类 号：TV642.2[水利工程—水利水电工程]