COLUMN REPLACING CONSTRUCTION METHOD

PROBLEM TO BE SOLVED: To provide a column replacing construction method which solves problems in conventional methods including a deep chemical mixing method, a fluidization treatment method, a PIP pile construction method, and an RG pile construction method, and is free from influence of characteri...

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Bibliographische Detailangaben
Hauptverfasser: YOSHIDA SHIGERU, MIZOGUCHI EIJIRO, MURAYAMA ATSUSHI
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a column replacing construction method which solves problems in conventional methods including a deep chemical mixing method, a fluidization treatment method, a PIP pile construction method, and an RG pile construction method, and is free from influence of characteristics of the objective ground, to thereby construct columns with stability and high quality. SOLUTION: According to the method, a screw auger 1 having an excavation section mounted on a front end thereof is rotated forward to excavate the ground, and after the auger 1 reaches a column replacement bottom location, it is rotated forward or backward to be pulled up by a distance almost equal to 1/4 to one time an excavated diameter D, followed by rotating the screw auger forward again to be lifted down to the replacement bottom location. Then while ejecting a filler containing no sediment or aggregate and having a consistency of 150 to 400 mm in terms of a table flow value when kneaded or ejected, from the front end of the screw auger at the replacement bottom location of the column, the auger kept rotated forward or kept in an almost irrotational state is pulled up. COPYRIGHT: (C)2007,JPO&INPIT