深水高土石围堰塑性混凝土防渗墙应力变形分析  

Stress and Deformation Analysis of Plastic Concrete of Cutoff Wall in Deepwater High Earth-rock Cofferdam

作　　者：李烽[1] 田斌[1] 卢晓春[1] 杨金强[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《中国农村水利水电》2012年第6期142-145,共4页China Rural Water and Hydropower

基　　金："十一五"国家科技支撑计划课题(2008BAB29B02);三峡大学硕士学位论文培优基金(2011PY006)

摘　　要：随着西部地区一些大型水利枢纽工程的兴建,需要在深水中填筑高土石围堰,其防渗墙的设计和施工对土石围堰安全运行至关重要。采用非线性有限元法,基于邓肯.张E-μ本构模型,结合工程实例,分析土石围堰应力变形规律,并根据施工过程和不同影响因素,进行多种方案比较,研究了塑性混凝土防渗墙在围堰施工运行过程中的工作性态变化,论证了围堰设计的合理性,为该围堰施工和安全运行提供了一定参考依据。With the building of some large-scale water control projects in western regions, it is necessary to fill the high earth-rock cofferdam in the deepwater. The design and construction of the cutoff wall is important to the safe operation of the earth-rock cofferdarn. Based on the constituve model of Duncan E-μ and combined with the project, this paper analyzes the law of the stress and deformation of the earth-rock cofferdams by adopting the method of the nonlinear finite element. According to the construction process and different affecting factors, this paper also studies workability changes of the plastic concrete cutoff walls in the process of cofferdam construction by comparing a variety of projects. It demonstrates the rationality of the design of the cofferdam, and provides a reference for the safe construction and operation of the cofferdams.

关 键 词：土石围堰 本构模型 塑性混凝土 防渗墙 应力 变形 

分 类 号：TV551.3[水利工程—水利水电工程] TV543