The grout construction method null in the cast-in-place concrete pile

摘要

PURPOSE:To promote bearing power of a pile by placing concrete after a grouting pipe is assembled to a pile reinforcement to insert it into an excavation hole, and making force-fit of grout into the grouting pipe to enhance the ground and the remainder of the slime. CONSTITUTION:An excavation hole l is formed in the ground, and a pile reinforcement 2 constituted of main bars 2a and hoops 2b assembled on the ground in advance is erected thereinto. After that, concrete is placed through a tremie pipe, etc., and grouting pipes 3 are buried in the concrete. Grout G such as cement bentonite impregnation chemicals is impregnated from an impregnating pipe section 3a. The pressurized grout G is injected from an injection port of an injecting pipe section 3c to the outside and the peripheral section of the front end of a pile, and it is injected to the ground in the front end of the pile and the slime strongly and uniformly to promote bearing power of the pile.