The 'Gaikaku Housuiro' drainage pump station second report: structural design of RC pump casings

摘要

The structural design of pump casings for the Gaikaku Housuiro Pump Station, the largest of its kind in Japan, was complex as it involved large capacity and high head features. Accordingly, a highly reliable design method, which considers complex 3D structure and load distribution, was required. Consequently, a new program for computing the structual design of RC pump casing was developed. This program computes the required area of each pump casing member, as well as for studying concrete stress. This program is based on the limit state design method and uses configurational and element force data from FEM analysis. This program was put to use effectively for the design of pump casings used in the Gaikaku Housuiro Drainage Pump Station. The result was an optimal reinforcement design which enabled a high degree of reliability and safety.