Analysis of the Spiral Case Cavity and Internal Water Pressure Influence of Pier Base

A three dimensional finite element analysis of the pier base for a hydropower station is presented using ANSYS software in this paper.The spiral case cavity and internal water pressure influence of pier base is analyzed according to the stress,reinforcement and displacement.The results show that it is necessary to consider the cavity and internal water pressure of spiral case influence of forced structure of pier base for analyzing the stress of pier base and reinforcement calculation.The structural design result of pier base will be more realistic when considering the whole structure calculation of power house especially to the hydropower station with high head and large diameter spiral case.