基坑内外水力联通对降水试验结果影响对比研究  

COMPARATIVE STUDY ON THE INFLUENCE OF HYDRAULIC CONNECTION INSIDE AND OUTSIDE FOUNDATION PIT ON DEWATERING TEST RESULTS

作　　者：王晶 WANG Jing(Tianjing Engineering of China Railway Beijing Engineering Group,Co.,Ltd.,300356,Tianjin,China)

机构地区：[1]中铁北京工程局集团(天津)工程有限公司,天津300356

出　　处：《建筑技术》2024年第10期1190-1194,共5页Architecture Technology

摘　　要：地下连续墙能够起到隔断基坑内外水力联系的作用。然而在我国沿海城市中,由于承压水的埋深较深,有时地下连续墙等具有止水帷幕作用的围护结构,难以完全截断承压水,会使基坑内外产生较大的水力联系。已有研究与工程实践发现,基坑内外水力联通时进行基坑降水,会引发一系列环境问题。因此可在正式降水期间进行降水试验,以判断基坑内外是否存在水力联通。通过对基坑内外存在与不存在水力联系两种情况下的降水试验结果进行对比分析,总结分析基坑所在区域不同位置观测井的水位变化曲线特征,可为基于降水试验判断基坑内外是否存在水力联系提供参考。Underground diaphragm walls play a role in hydraulic disconnection inside and outside foundation pits.In some coastal cities in China,however,confined water is deep,so enclosures with water-stop curtain effects cannot fully cut off confined water sometimes,such as underground continuous walls,which will result in significant hydraulic connection inside and outside the foundation pit.It is found in studies and engineering practice that dewatering of foundation pits with hydraulic connection inside and outside will lead to a series of environmental problems.Therefore,the dewatering test was carried out during the formal dewatering to check hydraulic connection inside and outside the foundation pit.Through the comparison and analysis of dewatering test results of the foundation pit with or without hydraulic connection inside and outside,the characteristics of the water level curves of observation wells in different areas of the foundation pit were summarized and analyzed,as a reference to check hydraulic connection inside and outside the foundation pit based on the dewatering test.

关 键 词：基坑降水 水力联通 降水试验 水位降深 

分 类 号：TU463[建筑科学—结构工程]