Abstract:

Needletype formwork jumbos, composite formworks and simple formwork jumbos are used in the construction of No. 05 and No. 06 bid sections of  SouthtoNorth Water Transfer Project. These three types of formworks are compared in terms of constructin techniques and construction cost on basis of the engineering experience. It is concluded that selection of proper formworks for the fullcircular crosssection tunnels of water conservancy and hydropower projects has great significance for the construction cost control and the improving of the lining progress.

Key words: water conservancy and hydropower projects, full circular lining, needle type hydraulic formwork jumbo, simple formwork jumbo, composite formwork