| 摘要 |
PROBLEM TO BE SOLVED: To provide a cast-in-place pile like a micropile having improved bearing capacity and horizontal resistance, and its construction method. SOLUTION: The micropile 10 serving as the cast-in-place pile connecting a structure 16 and the ground includes a pile body 18 made of a grout which is force-injected into an excavated hole 60 formed in the ground and then is hardened. A reinforcing steel pipe 20 is buried in the grout of the pile body 18. The reinforcing steel pipe 20 extends over a substantially whole longitudinal length of the pile body 18. The reinforcing steel pipe 20 has a plurality of pipe wall openings 30 formed in its pipe wall part in a manner that the unhardened grout, which is force-injected to form the pile body 18, can pass through. The pile body 18 has a grout/ground joint part 28 on the peripheral surface. The grout-ground joint part 28 is formed by allowing the force-injected grout to pass through the pipe wall openings 30 of the reinforcing steel pipe 20, to come into close contact with the ground and to harden. COPYRIGHT: (C)2010,JPO&INPIT |
