富水层地铁施工竖井垂直冻结法应用研究
Research on the Application of Vertical Freezing Technology in the Construction of Shafts in Water-Rich Subway
张士振1
作者信息
- 1. 中铁二十二局集团轨道工程有限公司 北京 100042
- 折叠
摘要
为响应北京市非降水工程的地下水保护政策,通过非降水措施完成地下工程施工作业.以北京地铁昌平线南延工程新建西土城暗挖车站施工竖井冻结法开挖为依托,介绍了垂直冻结法止水在富水砂卵石地层的竖井施工中的应用.竖井施工前通过周密的理论计算、合理的冻结孔布置、严格的冻结施工控制和精密的冻结过程监测,竖井井壁四周成功形成止水帷幕,为竖井的无水开挖安全作业提供了便利条件,可为北京市在非降水施工项目提供工程经验.
Abstract
In response to the groundwater protection policy of non-dewatering project in Beijing,the construction of underground engineering is completed by non-dewatering measures.The application of vertical freezing method in the construction of shaft freezing method at Xitucheng underground dig station in the south extension project of Beijing Subway Changping Line was introduced.Before the construction of the shaft,through careful theoretical calculation,reasonable freezing hole layout,strict freezing construction control and precise freezing process monitoring,the sealing curtain was successfully formed around the shaft wall,which served convenient conditions for the safe operation of waterless excavation of the shaft,and also provided engineering experience for ongoing non-dewatering construction projects in Beijing.
关键词
地铁工程/施工竖井/垂直冻结法/止水帷幕Key words
subway project/shaft construction/vertical freezing method/waterproof curtain引用本文复制引用
基金项目
中铁二十二局集团轨道工程有限公司科研计划(19-03A)
出版年
2024
NETL
NSTL
万方数据