某水电站混合坝接头坝顶开裂成因分析
[Abstract]:In view of the problem of soft and hard material contact interface at the joint of mixed dam and easy to produce crack at the dam top, taking a hybrid dam project of a hydropower station as an example, in view of the phenomenon of multiple cracks in the joint part of the core rockfill dam after the initial storage of water, there are many cracks at the top of the dam. Considering the humidification and rheological characteristics of dam material, the 3-D numerical simulation analysis of the right bank core wall rockfill dam and the joint dam segment is carried out by using the finite element coupled deformation dip method. The results show that: (1) the wet deformation of the upstream rockfill caused by water storage is the main reason for the cracking of the joint dam top; (2) the dam material in the joint part is restrained by the support of the lower concrete joint slope, and the settlement displacement is obviously smaller than that of the upstream rockfill, which leads to the uncoordinated deformation. (3) the large settlement gradient of the top of the dam is the main cause of the cracks at the dam top, in which the crack caused by the settlement gradient along the dam body is parallel to the axis of the dam, and the crack caused by the settlement gradient along the river along the dam top is perpendicular to the axis of the dam. Compared with the actual crack site of the dam top, it is preliminarily judged that the probability of cracking is higher when the uneven settlement gradient of the dam top is 0.6. The results obtained can provide a reference for the design and construction of hybrid dams.
【作者单位】: 河海大学水利水电学院;大唐观音岩水电开发有限公司;
【基金】:中央高校基本科研业务费(2016B03514,201405614) 国家科技支撑计划课题(2015BAB 07B05) 江苏省高校优势学科建设工程资助项目(YS11001)
【分类号】:TV698
【相似文献】
中国期刊全文数据库 前10条
1 任翔;杨光;李刚;;插入式混合坝接头部病险原因分析与处理[J];河南水利与南水北调;2010年10期
2 彭云枫;何蕴龙;李建成;;混合坝接头型式与抗震安全性分析[J];武汉大学学报(工学版);2008年03期
3 黄加球;插入式混合坝接头部位有限元静动力分析[J];红水河;2005年01期
4 徐家奇;何蕴龙;李黎;;混合坝接头有限元动力分析[J];贵州水力发电;2006年01期
5 孙健;钟霞;;新疆山口水电站混合坝防渗工程及结构特点[J];农业科技与信息;2010年08期
6 徐家奇;李黎;;混合坝接头动力反应敏感性分析[J];水电能源科学;2007年05期
7 罗刚,张连卫,张建民;高挡墙混合坝动力反应分析[J];水力发电学报;2005年01期
8 周伟;常晓林;周创兵;冉红玉;王辉;;观音岩水电站混合坝接头结构形式研究[J];岩土力学;2008年02期
9 龚前良;;江苏宜兴抽水蓄能电站上库面板堆石混合坝建设实践[J];水力发电;2009年02期
10 刘汉龙;刘彦辰;杨贵;陈育民;;新型混凝土-堆石混合坝的基本力学特性[J];河海大学学报(自然科学版);2013年05期
中国重要会议论文全文数据库 前1条
1 徐晗;黄斌;饶锡保;潘家军;左永振;;混合坝侧墙式接头接触状态分析[A];第十一届全国土力学及岩土工程学术会议论文集[C];2011年
中国硕士学位论文全文数据库 前2条
1 赵磊;插入式混合坝接头部位静动力特性分析[D];大连理工大学;2007年
2 黄加球;插入式混合坝接头部位有限元静动力分析[D];大连理工大学;2005年
,本文编号:2202053
本文链接:https://www.wllwen.com/kejilunwen/shuiwenshuili/2202053.html