福州地区高承压富水砂层地铁车站深基坑工程降水技术
孙明祥
Dewatering Technology of Metro Station Deep Foundation Pit of High Pressure and Rich Water Sand Stratum in Fuzhou Area
SUN Mingxiang
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作者信息:中铁南方投资集团有限公司，518054，深圳
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Affiliation:China Railway Construction Investment Group Co., Ltd., 518054, Shenzhen, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.09.036
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中图分类号/CLCN:T551.4+12:U231.4
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栏目/Col:研究报告
摘要:
福州地区地层受小流域及海洋条件影响，浅部第四系沉积物变化极大，规律性极不明显。与全国其他城市对比，明挖地铁车站基坑施工过程中遇到软土、富水砂层、孤石时均属较大风险项目[1]。以福州地铁5号线两座车站明挖基坑施工为背景，对比分析了这两座车站的深基坑围护结构设计及降水设计。结果表明：通过采取合理降水管控及墙缝注浆等措施，可保障基坑开挖稳定。深基坑及周边环境实时沉降监测结果表明：在两种降水方案条件下，支护结构及周边沉降都可得到很好管控。
Abstracts:
Fuzhou area stratum formation is affected by small watershed and ocean conditions, and the shallow quaternary sediments vary greatly with little regularity. Compared with other cities in China, encountering soft soil, water-rich sand and isolated stone during open excavation of metro station foundation pit construction are all relatively risky[1]. Taking foundation pit open excavation construction of two stations along Fuzhou Metro Line 5 as background, deep foundation pit retaining structure design and dewatering design of the two stations are compared and analyzed. Results show that through the adoption of measures such as reasonable dewatering control and cracks grouting, the stability of deep foundation pit excavation is guaranteed. Real-time settlement monitoring results of deep foundation pit and surrounding environment show that under the condition of two dewatering schemes, supporting structure and surrounding settlement are well controlled.
引文 / Ref:
孙明祥.福州地区高承压富水砂层地铁车站深基坑工程降水技术[J].城市轨道交通研究，2021，24(9):173.
SUN Mingxiang.Dewatering technology of metro station deep foundation pit of high pressure and rich water sand stratum in Fuzhou area[J].Urban Mass Transit，2021，24(9)：173.
SUN Mingxiang.Dewatering technology of metro station deep foundation pit of high pressure and rich water sand stratum in Fuzhou area[J].Urban Mass Transit，2021，24(9)：173.
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