Cast-in-place concrete steel pipe pile and its construction methods

摘要

PROBLEM TO BE SOLVED: To provide a cast-in-place steel pipe concrete pile and its construction method forming a final mutual joint part of steel pipes as a joint part equivalent to full strength joining with no risk of loosening the surrounding ground with a small amount of projection to the outside of a steel pipe in pile construction.;SOLUTION: In the cast-in-place steel pipe concrete pile 1 and its construction method, a plurality of joining splice plates 11 circumferentially divided over the inside of upper and lower steel pipes 2 are arranged at the mutual joint part of the steel pipes in a cast-in-place pile with its lower part formed in reinforced concrete structure and with its upper part formed in steel pipe concrete structure covered with a plurality of steel pipes arranged in series. The steel pipes 2 are fastened and joined to the respective splice plates 11 by high strength bolts 14 penetrating bolt holes provided beforehand in the steel pipes 2. The upper part of a long-sized reinforcing cage 4 is disposed inside the lower part of the steel pipe, and a short-sized reinforcing cage 5 is disposed embedded over a predetermined length in a vertical direction inside the joint part of the upper and lower steel pipes 2 to reinforce the steel pipe joint part to have predetermined yield strength.;COPYRIGHT: (C)2008,JPO&INPIT