摘要
在水利工程中,基础工程都处于河道周围或者河道中,地下水位较高,在这些工程中进行基坑开挖时若不采取有效的排水措施,容易导致流砂,管涌,严重时会导致基坑塌方、邻近地层掏空下陷等事故。因此进行渗流场分析是非常必要的,对渗流场进行合理的数值模拟有着十分重要的意义。根据一个草土围堰基坑的抽排水算例,编制了相应的二维有限元程序,对比了在不同工况下,水头、浸润线和渗流量等渗流要素的变化规律,分析得出在不同地基情况下,需要抽排水量的大小,确定地基是否需要修筑防渗墙,以便采取经济合理的基坑防渗排水措施。
In hydraulic engineering, because the foundation work is in the river course or around the river course and the ground water level is high. If there is no effective measure for water draining structure excavation in these projects, It is easy to cause the shifting sand, the piping and more seriously landslide or collapse due to excavated for building foundation, and other accidents. It is very essential to analyze the seepage field. According to a concrete project example in this paper, we established a finite element program and then analyzed and contrasted under different project situation the change rule each seepage essential factor, to decide whether the anti - seepage wall need to be constructed, in order to have a better control of dewatering.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第6期1316-1320,1324,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金项目(50579092)
教育部新世纪优秀人才支持计划(NCET-05-0679)
三峡大学科技创新团队项目(603402)
关键词
基坑
渗流场
有限元
基坑排水
草土围堰
foundation pit
seepage field
finite element method
dewatering
sward cofferdam
