CUTTING-REMOVING METHOD OF CORE MATERIAL IN METHOD OF COLUMN STRIP TYPE UNDERGROUND CONTINUOUS WALL CONSTRUCTION

摘要

PURPOSE: To execute construction simply, safely and silently while enabling the cutting and removal of a core material even at a place near to a buried article safely without receiving a constraint at a position. ;CONSTITUTION: Retaining walls 4 are formed by boring a plurality of pits 2 to the ground G and injecting a solidifying material into the pits 2 and agitating the solidifying material with soil at original places while erecting in core materials 3 in a method of colum strip type underground continuous wall construction, the construction sides 6 are backfilled up to sections near to the places 10 of cutting of the core materials 3 after the completion of construction works, and the front end sides of the core materials 3 are cut off in a specified size on the construction sides and window-shaped sections are formed. The chipping works of soil cement are conducted through the window-shaped sections, thus forming cavity sections. Notches 12, 14 are formed in a chevron shape extending over the rear end sides from the front end sides of the core materials 3 and the core materials 3 are cut, and the excavating sections of the construction sides 6 are backfilled. The head sections 15 of the core materials 3 are projected, and the head sections 15 of the core materials 3 are gripped and the core materials 3 are extracted while giving high-frequency vibrations.;COPYRIGHT: (C)1996,JPO