The compound method of three-dimension elastic FEM and plane substructure
method is put forward in engineering design according to design requirements of
load-carrying capability and crack control. This method avoids the shortcomings of current
design method. The feasibility and rationality of this method are proved, and the data
management and transmission in intermediate links are solved. This method is used in the
optimal design of the inlet structure of Long-Tan water diversion tunnel hole and Su-Tong
bridge, and pile-support structure of the result is rational.