Abstract:

 Zhongtianshan Tunnel has long blind heading and tight schedule, therefore the traditional single-process construction method can not satisfy the design requirements. It is proposed on basis of the field conditions that lining is made at the same time with the tunnel boring by means of TBM. In order to ensure that the trains can pass the lining construction area rapidly and safely, innovations are made in the design of the lining formworks trolley and the construction method of the side wall foundations. Because the traditional water and power supply scheme can not satisfy the 14kmlong blind tunnel boring, innovations are made in the water and power supply scheme. In order to ensure the construction schedule, the construction organization is optimized. Finally issues that are to be solved in the future are listed. The construction practice demonstrates the social and economic benefits and good prospect of this technology. 

Key words:  , tunnelTBM boring methodsimultaneous liningsingletrack speed limitconstruction organizatio