Su′ai shield tunnel in Shantou is the
first extralong and super largediameter subsea shield tunnel located in 8degree
seismic intensity area in China. In this paper, the design process of the
project is reviewed. First, every special research completed in phases of
engineering feasibility study, preliminary design and construction drawing
design of Su′ai Tunnel are presented, and experience is
summarized. Second, the main contents of route comparison and selection,
construction method comparison and seismic design are introduced, and the
thinking of design consideration of various schemes, specific methods of
seismic design and specific values of waterproof standard, etc. are provided.
Finally, the experience of the design of this project is summarized, and some
advices are proposed to provide a useful reference for the design of underwater
shield tunnel in high seismic intensity area.
