PRESTRESSING METHOD FOR EGG-SHAPED CONCRETE VESSEL STRUCTURE

摘要

PROBLEM TO BE SOLVED: To give a predetermined tension force in the peripheral direction even if an amount of PC tension material and the number of anchor devices are reduced, in an egg-shaped concrete vessel structure 1. ;SOLUTION: A plurality of grooves 20 are provided in the direction of meridian on a wall face, and a spiral PC tension member insertion duct is formed in a shell wall thickness so as to pass through the grooves 20. A PC tension member 10 is inserted over the whole length of the duct, one end of the PC tension member 10 is fixed, the PC tension member is gripped in the grooves 20 to tense it sequentially, and it is finally fixed at a terminal of the other end of the PC tension member.;COPYRIGHT: (C)2001,JPO