Application of Freezing Method in Excavating Tunnel Connecting Passages

At present,the tunnel construction technology is improving along with the construction of subway in major cities of China.The construction of metro section connecting passages is quite difficult due to space limitation.Because of its advantages such as strong practicability,good effect and environmental protection,freezing method has become the main construction method.The application of freezing method in excavating tunnel connecting passages and some construction notes are studied according to engineering practice,which can provide a certain reference for similar projects.