考虑衬砌板跨度影响的U型渠道热-力耦合研究  

Temperature-stress Coupling of U-shaped Canal Considering the Effects of Linings' Span

作　　者：唐少容[1,2,3] 王红雨[1,2,3] 李存云 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021 [2]宁夏节水灌溉与水资源调控工程技术研究中心,银川750021 [3]旱区现代农业水资源高效利用教育部工程研究中心,银川750021

出　　处：《灌溉排水学报》2015年第11期65-69,共5页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(51269023);宁夏大学自然科学基金项目(ZR1438)

摘　　要：为了研究混凝土衬砌板纵向跨度对冻胀效应的影响,基于整体式小型U型渠道的结构特点和冻胀特征,视衬砌板和受冻基土为平面应变和三维实体结构,采用热-力耦合分析方法,分析研究了整体式小型U型渠道在冻胀作用下的效应。结果表明:1按三维实体分析的位移略小于按平面问题分析;2板与板刚性接缝处产生较大的不均匀纵向位移,是渠道受冻胀作用的薄弱位置;3板跨度越大,其纵、横向水平位移及竖向位移均略有增大。Frost heave damage in canals is a common phenomenon in cold regions.On basis of structural feature and frost heaven characteristic,and considering the problem as plain stress problem and 3Dstructures respectively,a temperature-stress coupling problem was analyzed on integral U-shaped canal under frost heaving by taking the concrete lining and frozen soil as a whole.The result showed that the displacement of 3Dwas less than the plane stress solution.The rigid joint between linings was the weakness of the structure because of uneven longitudinal displacement.The transverse,longitudinal and vertical deformation increased with the growing of linings＇ longitudinal dimension.

关 键 词：冻土 衬砌结构 冻胀效应 刚性接缝 

分 类 号：TV672[水利工程—水利水电工程]