超深埋强透水地层地铁冻结法联络通道工程实践
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摘要
福州地铁2号线厚庭站～桔园洲站盾构区间全长2668m,是2号线最长的盾构区间,该区间共设5座联络通道,4座采用冻结法施工,其中2#联络通道位于乌龙江江底。本文对乌龙江联络通道处地层进行地下水流速流向测试、冻结加固设计方案的优化、冻结温度场分析等方面进行阐述,表明冻结法在该工况下加固效果良好,为类似工程提供了很好的借鉴作用。
The total length of the shield interval from Houting station to Juyuanzhou station is 2668 m,which is the longest one of Fuzhou Subway line 2. There are 5 connected aisles in this interval,and 4 of them are constructed with freezing method. The 2# connected aisle is buried deep under the Wulong River bottom. Based on the flow velocity and direction tests of underground water,optimization of freezing reinforcement design scheme and analysis of frozen temperature field have been conducted in the strata of the Wulong River connected aisle. The results show that the freezing method is effective in the reinforcement under this condition,and it provides a reference in similar projects.
The total length of the shield interval from Houting station to Juyuanzhou station is 2668 m,which is the longest one of Fuzhou Subway line 2. There are 5 connected aisles in this interval,and 4 of them are constructed with freezing method. The 2# connected aisle is buried deep under the Wulong River bottom. Based on the flow velocity and direction tests of underground water,optimization of freezing reinforcement design scheme and analysis of frozen temperature field have been conducted in the strata of the Wulong River connected aisle. The results show that the freezing method is effective in the reinforcement under this condition,and it provides a reference in similar projects.
引文
[1]陈湘生.地层冻结法[M].北京:人民交通出版社,2013.
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[2]杨平,张婷.城市地下工程人工冻结法理论与实践[M].北京:科学出版社,2015.
[3]龚剑,吴小建.地下工程施工安全控制及案例分析[M].上海:上海科学技术出版社,2019.