A DESIGN AND CONTROL METHODS FOR CONSTRUCTION OF PRESTRESSED CONCRETE WATER TANK BUILT ON THE POOR-LOAM SUBSOIL

Abstract

This report describes a part of the design and the construction of a 15000 cubic meters effective volume of prestressed concrete water-tank, built on the poor-loam-subsoil reaching to 24 meters height, at “T” city, Saitama prefecture.
The tank has a 34.2 meters inside diameter, a 17.0 meters effective water depth and 300 sets of 24.0 meters long autoclaved high strength concrete pile, partially reinforced by a sheet of thin steel plate.
This report contains a dynamic analysis of the tank-pile-ground, total system, an analysis of the increasing stress at the wall of the tank due to the seismic hydraulic pressure and controll methods for piling and prestressing.