地震工程学报2025，Vol.47Issue(5)：1065-1075,11.DOI:10.20000/j.1000-0844.20230113001
倾斜互层下深基坑分区降水及变形控制研究
Zoned dewatering and deformation control for deep foundation pits in inclined interbedded strata
摘要
Abstract
To address localized seepage issues at the base of deep foundation pits constructed in inclined interbedded strata adjacent to rivers,further research is needed to develop rational groundwater and deformation control strategies.This study examines a deep foundation pit pro-ject near the Yellow River in Anning District,Lanzhou City.In response to the distinct charac-teristics of inclined interbeds,a zoned dewatering scheme combining inclined aquitards with nor-mal partition plates was proposed.Numerical simulations comparatively analyzed differences in supporting structure deformation,groundwater seepage within the pit,and surrounding ground settlement under zoned versus non-zoned conditions.Results demonstrate that under zoned dewa-tering conditions,groundwater level rapidly declines because of the sealing effect of inclined aquitards and partitions,exhibiting a"trapezoidal serrated pattern"along partition plates.Nota-bly,the design base water level maintains long-term stability after pump cessation,effectively resolving seepage problems at the pit base.Regarding comprehensive control effects-including structural deformation,pore pressure within the pit,and surface settlement around the site-the foundation pit performs better under zoned dewatering conditions than under conventional un-zoned conditions.关键词
临河深基坑/止水/倾斜含水层/分区降水Key words
deep foundation pit near the river/water sealing/inclined aquifer/zoned dewatering分类
建筑与水利引用本文复制引用
刘玉果,王冰辉,乐冀,刑领,侯彦东..倾斜互层下深基坑分区降水及变形控制研究[J].地震工程学报,2025,47(5):1065-1075,11.基金项目
大型深基坑综合性降水施工技术研究(032021) （032021）
