Based on the field observation record, the ice sheet is divided into the emersed part and floating part and a new method for calculation of ice force on conical structure named “Advanced Model" is built,and the bending moment distribution in ice sheet is analyzed to determine where bending failure will occur, therefore the analytic solution of ice force on conic.

The ice sheet bending failure against ice breaking in cone can be distinguished into radial crack mode and circumferential crack mode.

The application of ice surface sinking raft in hydraulicengineering in severe cold area;

Discussion on Some Questions about the Diversion Canal Type of Hydropower Station Ice sluicing in"Code for Design of Hydraulic Structures against Ice and Freezing Action"