SLUDGE TREATMENT METHOD IN PREFABRICATED PILE CONSTRUCTION, AND GROUND REINFORCING STRUCTURE OBTAINED BY METHOD

摘要

PROBLEM TO BE SOLVED: To provide a sludge treatment method and ground reinforcing structure, wherein construction sludge generated in the prefabricated pile construction is not only effectively used, but the total construction cost is reduced, and the ground is reinforced, by using the construction sludge for reinforcing the ground where the prefabricated pile is constructed.;SOLUTION: A buried-in pile such as a concrete pile 5 is constructed to penetrate through a soft layer A of the upper part of the ground. Hardening material such as cement is mixed in sludge mixed with excavation liquid such as bentonite waste water discharged in buried-in construction, and the mixture is injected into a post hole 6 dug separately from a pile hole 1 in a construction site. The post hole 6 has a larger diameter and a smaller depth than the pile hole 1, whereby such smaller depth enables excavation without the excavation liquid, and discharged sediment is reused intact as naturally generated earth 8. The sludge containing the hardening material injected into the post pole 6 is hardened so that a soil cement post 10 is formed to directly reinforce the ground, to inhibit liquefaction, and to increase horizontal resisting force at the head of the prefabricated pile 5.;COPYRIGHT: (C)2004,JPO