南宁古近系粉砂岩、富水圆砾层地铁深基坑地下水控制措施研究  

Study on Groundwater Control Measures in Deep Foundation Pit of Nanning Metro Line 1 Station

作　　者：高涛[1] 王炳华 Gao Tao;Wang Bing-hua

机构地区：[1]北京城建勘测设计研究院有限责任公司,北京100101 [2]南宁轨道交通集团有限责任公司,南宁530029

出　　处：《建筑技术开发》2020年第9期152-154,共3页Building Technology Development

摘　　要：基于南宁市轨道交通1号线勘察资料、南宁地区地下水资料和施工经验,将1号线分为2个工程地质及水文地质单元。单元I地貌为侵蚀剥蚀丘陵区,车站基坑采用排桩+内支撑的支护方式,地下水控制措施为坑外降水,辅以明排措施;单元II地貌单元为侵蚀堆积河谷阶地区,车站深基坑采用地下连续墙+内支撑,地下水控制措施为坑内管井疏干;对于水位降深要求小于5.0 m的出入口等附属结构基坑,地下水控制措施为坑外降水。Based on the survey data of Nanning Rail Transit Line 1,the groundwater data of Nanning and the construction experience,this paper divides line 1 into two engineering geology and hydrogeology units.The geomorphic unit I is the erosion and denudation hilly area,the foundation pit of the station adopts the support mode of row pile+internal support,and the groundwater control measures are precipitation outside the pit,supplemented by open drainage measures.Unit II geomorphologic unit is the erosion and accumulation valley level area,the deep foundation pit of the station adopts underground diaphragm wall+internal support,and the groundwater control measures are the drainage of tube wells in the pit.For auxiliary structure foundation pits whose water level drop depth is less than 5.0 m,the groundwater control measures are dewatering outside the pit.

关 键 词：地铁站 粉砂岩 圆砾 深基坑 地下水控制 

分 类 号：U231.3[交通运输工程—道路与铁道工程]