深厚覆盖层上高土石坝的动力反应特性研究  

Dynamic Response Research of High Earth-Rock Dam onthe Thick Moraine Cover Foundation

作　　者：郑娅娜[1] 党发宁[1] 尹小涛[1] 

机构地区：[1]西安理工大学岩土工程研究所,陕西西安710048

出　　处：《西安理工大学学报》2005年第1期59-63,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(10372078);陕西省教育厅专项科研计划资助项目(01JK139)。

摘　　要：以相同尺度和相同材料的建造在深厚覆盖层上直心墙土石坝和直接建设在基岩上的直心墙土石坝为例,采用二维动力有限元程序对比和分析了强震区两种高土石坝的静应力分布和动力反应的差异。计算结果表明,设计深厚覆盖层上直心墙土石坝时,大坝自身的动力稳定设计标准可直接采用建设在基岩上的直心墙土石坝的设计标准,而静力稳定问题应加强大坝坝脚以及心墙两个底角部的防护。Taking the earth-rock dams with straight clay core constructed on thick moraine cover foundation and directly built on bed-rocks with the same sizes and the same materials for example, two-dimensional dynamic FEM programme is used to contrast and analyze the static stress distribution and dynamic response difference of two types of high earth-rock dams in the intensive earthquake zones. The computation results indicate that when the earth-rock dam with the straight clay core on thick moraine cover foundation is designed, the design criterion for the earth-rock dam with straight clay core directly built on the bed-rock can be adopted for the design criterion of dynamic stability of dam itself, but the dam feet and the dam clay core feet should be reinforced for static stability.

关 键 词：有限元 动力反应 等效线弹性模型 深厚覆盖层 高土石坝 

分 类 号：TV312[水利工程—水工结构工程]