摘要
井点降水引起的地面变形是工程施工中经常遇到的问题,80年代之后这一问题开始受到重视,由于沉降的机理复杂,目前这一问题仍然没有很好的解决。作者在分析了降水引起地面变形的机理的基础之上,即把地面变形归结于有效应力的增加,动水压力的作用,以及井点的真空作用,提出采用比奥模型进行预测,并结合南京地铁某基坑降水工程,从而为其合理的降水方案提供了依据。
Well- point dewatering will cause ground movement, after 1980s, many scientists pay attention to this problem. But because of the complexity of the mechanism of settlement, it didn＇t well be solved. In this paper, The author analysed the reason for well- point dewatering causing ground movement, that is it is caused by efficient stress increasing, hydraulic stress increasing and the vacuum- impact of the well- poit; the Biot model was used to calculate it, and finally a reasonable dewatering plan was given.
出处
《地下空间与工程学报》
CSCD
2006年第1期137-140,共4页
Chinese Journal of Underground Space and Engineering
关键词
井点降水
地面变形
比奥模型
well-point dewatering
ground movement
Biot Model
