Abstract: Many problems have arisen during the construction of the longsection and largetonnage prefabricated utility tunnel demonstration project in Xiong′an new area, China. Some of these problems are the difficulties in installation and control and the low efficiency of erection and construction. Therefore, a construction technology scheme of prefabricated utility tunnels involving transportation and erection above the utility tunnel is proposed. A prefabricated utility tunnel erection system is developed.  This system integrates a 450 t tunnel crane, TLC600 tunnel transport vehicle, TLJ600 tunnelerecting machine, and prestress tension machine. It is revealed that the construction technology of transportation above the utility tunnel can eliminate the need to construct access roads and reduce the amount of earthwork excavation. The construction technology of erection above the utility tunnel can improve erection stability and meet the installation requirements and rotary hoisting of prefabricated tunnel segments. The automation level of erection and installation can be improved through the cooperative operation of construction equipment. The application results indicate that the proposed prefabricated tunnel construction technology makes possible the automatic safe erection of longsection and largetonnage prefabricated utility tunnels, ensures the hoisting stability and installation accuracy of the prefabricated tunnel segments, and improves the construction efficiency of monolithic largetonnage prefabricated utility tunnels.

Key words: longsection and largetonnage utility tunnel, prefabricated assembly, construction technology, construction equipment, erection and installation, prestress tension