深厚强透水含水层地铁深基坑地下水控制方案综合比选方法  

Comprehensive comparison of various scenarios to groundwater control for a deep metro excavation in highly-permeable aquifers

作　　者：曹成勇 彭远胜 CAO Chengyong;PENG Yuansheng(College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,Guangdong,P.R.China;Shenzhen Key Laboratory of Green,Efficient and Intelligent Construction of Underground Metro Station,Shenzhen University,Shenzhen 518060,Guangdong,P.R.China;Key Laboratory for Coastal Urban Resilient Infrastructures of Ministry of Education,Shenzhen University,Shenzhen 518060,Guangdong,P.R.China)

机构地区：[1]深圳大学土木与交通工程学院,广东深圳518060 [2]深圳大学深圳市地铁地下车站绿色高效智能建造重点实验室,广东深圳518060 [3]深圳大学滨海城市韧性基础设施教育部重点实验室,广东深圳518060

出　　处：《土木与环境工程学报（中英文）》2024年第4期82-90,共9页Journal of Civil and Environmental Engineering

基　　金：国家自然科学基金(51938008);中国博士后科学基金(2021T140474)。

摘　　要：针对深厚强透水含水层地铁深基坑地下水控制方案比选问题,联合运用层次分析法、模糊综合评价法以及数值计算方法,提出深厚强透水含水层地铁深基坑地下水控制方法定性与定量化比选流程框架,建立了强透水地层地铁深基坑地下水控制方案综合比选方法。以福州地铁水部站深基坑工程为例,采用建立的比选方法,对5种不同深基坑地下水控制方案(敞开式降水、落底式止水帷幕、深层水平封底帷幕、悬挂式止水帷幕降水以及水下开挖)进行定性评估分析,结果表明,悬挂式帷幕降水方案为该车站深基坑工程地下水控制最优方案。采用数值模拟方法,分析得到了深基坑降水引发的周边地表沉降值在12~23 mm之间,表明42 m悬挂式止水帷幕降水方案能有效控制深基坑降水引发的地表沉降。For comparison and selection of groundwater control scenarios for subway deep foundation pits in deep and high permeable aquifers,this paper presents the qualitative and quantitative comparison and selection framework by using analytic hierarchy process,fuzzy comprehensive evaluation and numerical calculation methods.Comprehensive comparison of various scenarios to groundwater control for a deep metro excavation in highly-permeable aquifers is established.Taking Shuibu metro station in Fuzhou as an example,five different groundwater control scenarios(i.e.open dewatering,fully penetrating curtains,deep horizontal bottom sealing curtain,partially penetrating curtains with dewatering,underwater excavation)are evaluated and analyzed using the proposed method.The results show that the scenario of both partially penetrating curtains and dewatering is the best for groundwater control.Then,the numerical simulation is used to analyze the surrounding surface settlement caused by dewatering.The results show that the surface settlement is in the range of 12-23 mm,which shows that the partially penetrating curtains with 42 m length can effectively control the surface settlement caused by dewatering.This method provides a solution for comparison and design of groundwater control scenarios for subway foundation pits in deep and high permeable aquifers.

关 键 词：深基坑 地铁 强透水含水层 地下水控制 方案比选 

分 类 号：TU924[建筑科学—建筑设计及理论]