Problems, i.e. cavity behind crown, insufficient
thickness of lining and crown spalling, exist in secondary lining of railway
tunnel. As a result, the technical schemes, i.e. combination of concrete
prefabrication technology and castinplace
technology, precast segment used in secondary lining arch, and the castinplace concrete used in the other parts of
secondary lining, are put forward. And the Lshaped
joint concrete lining formwork trolley is developed. The structure and design
of the trolley are introduced in detail, the design scheme and parameters are
determined, and the field application of the trolley in Hujiagou Tunnel of East
Ring Line of Chongqing Railway Terminal is briefly described. The use of the
trolley can shorten the construction period, reduce the number of construction
personnel, and solve the problem of crown spalling.
