PILE ESTABLISHING METHOD BY SPIRAL HOOP ADVANCED ERECTION

摘要

PROBLEM TO BE SOLVED: To construct a cast-in place pile efficiently in a simple constitution by holding a spiral hoop with a fixed spacer to which an outer frame is fitted to be erected in a drilled hole, fixing a foot plate to an inner frame fitted to a main reinforcement, fixing the head of the main reinforcement, and placing concrete. ;SOLUTION: An outer frame 3 is fixed to the tip of a spiral hoop 1, the spiral hoop 1 is sequentially erected in a drilled hole 4 while being fitted to a fixed spacer 2, and when the outer frame 3 reaches the bottom of the drilled hole 4, the head of the spiral hoop 1 is fixed. Subsequently an inner frame 7 is fitted to the tip of the main reinforcement 5, and a foot plate 6 is fitted to the upper part thereof. The inner frame 7 is supported by the main reinforcement fixing part 8 at the tip of the main reinforcement 5, and after the main reinforcement 5 is fitted to the outer periphery of the foot plate 6, the main reinforcement 5 is sequentially erected in the drilled hole 4, and when the inner frame 7 reaches the bottom of the drilled hole 4, the head of the main reinforcement bar 5 is fixed. Concrete in water is placed by a tremie pipe.;COPYRIGHT: (C)1999,JPO