大岗山拱坝陡坡坝段并缝形式研究  

Study on monolith jointing type on steep slope section of Dagangshan Arch Dam

作　　者：黎满林[1] 潘燕芳[1] 王超[1] 井向阳[1] 

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《人民长江》2014年第22期58-61,共4页Yangtze River

摘　　要：大坝设计时,由于陡坡坝段体形相对较差,且受基岩及相邻坝段约束较强,若分缝形式不合理,将产生过大的局部拉应力,给坝体混凝土带来开裂风险。为改善陡坡坝段的应力状态,以大岗山拱坝为例,根据拱坝温度边界条件,采用有限单元法模拟混凝土浇筑过程,对陡坡坝段不同的分缝形式进行了应力仿真分析。结果表明,大岗山拱坝陡坡坝段采用斜缝的分缝形式是合适的,能有效改善坝体应力分布、减少应力集中、提高拱坝抗裂安全度。Due to the relative poor configuration and the stronger constraint from bedrock and adjacent dam monoliths,the excessive tensile stress would occur in the steep slope section of an arch dam. If the monolith jointing type is not reasonable,it will bring the risk of concrete cracking. In order to improve the stress state of the dam,the concrete pouring process is simulated according to the temperature boundary condition of Dagangshan arch dam. The finite element method is used to simulate and the structural stress of the different monolith jointing types in the steep slope. The results show that the diagonal jointing type in steep slope section of Dagangshan arch dam is reasonable,which can improve the stress distribution,reduce stress concentration and increase global safety of the arch dam.

关 键 词：陡坡坝段 并缝形式 有限单元法 温度应力 大岗山拱坝 

分 类 号：TV43[水利工程—水工结构工程]