Abstract:

Taking Jiefang Road Extension Tunnel Project in Hangzhou, China as project case, the author presents the stepbystep and layerbylayer dewatering technology adopted for saturated fine silty sand ground so as to ensure the construction safety and the works quality, with the emphasis being placed on the description of the design of the pipe wells and well points, the determination of the dewatering parameters, the dewatering process and the dewatering effect.

Key words:  , tunnelstepbystep and layerbylayer dewateringground watersaturated fine silty sand grounddewater effect