Research on the Application of Vertical Freezing Technology in the Construction of Shafts in Water-Rich Subway
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.
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