复杂岩基上重力坝坝基稳定地质力学模型试验研究  

Geo-mechanical Model Test on Foundation Stability of Gravity Dam on Complex Rock Foundation

作　　者：张林[1,2] 杨宝全[1,2] 丁泽霖[1,2] 胡成秋[1,2] 

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]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：《水力发电》2009年第5期39-42,共4页Water Power

基　　金：国家自然科学基金资助项目(50879050)

摘　　要：建在复杂地质条件上的重力坝,坝基中往往存在多种软弱结构面。为了在物理模型试验中考虑软弱结构面的强度弱化对坝基稳定的影响,采用地质力学模型试验方法对武都碾压混凝土重力坝坝基稳定性进行研究。试验中采用变温相似材料模拟坝基中软弱结构面的力学参数及弱化行为,在同一模型上进行超载和降强相结合的综合试验,获得了坝基失稳的破坏过程、变形分布特点及破坏形态,并得到评价工程安全性的综合安全系数,为工程的设计与施工提供了科学依据。Many weak structural planes often exist in the foundation of the gravity dam built on the complex geological conditions. Taking account of the strength weakening effect on stability of the dam foundation in the physics model, the method of geo-mechanics model test has been used to analyze the foundation stability of the Wudu Roller Compacted Conerete（RCC） Gravity Dam. In the model test, mutative temperature similar materials have been adopted to simulate the mechanical parameters of the weak structural planes and their weakening acts. Thus synthetic method test which combines overloading method and strength reduction method has been employed in one model. Then the stability failure process of dam foundation,deformation distribution characteristics and destructive configuration were gained.Furthermore,the integrated safety coefficents for evaluating the safety of project could be gained, which provides important scientific basis for the design and construction of project.

关 键 词：坝基稳定 软弱结构面 强度弱化 变温相似材料 综合试验法 武都碾压混凝土重力坝 

分 类 号：TV642.2[水利工程—水利水电工程] TV321