SHAFT CONSTRUCTION METHOD AND SHAFT STRUCTURE ON SLOPED GROUND

摘要

PROBLEM TO BE SOLVED: To provide a shaft construction method and a shaft structure on sloped ground which can reduce work labor, working hours and construction cost and successfully prevent sliding of an upper layer ground and falling forward of an inverted lining wall at the upper part of a shaft.;SOLUTION: In a shaft construction method, ground improvement processing is performed to an outside peripheral edge, which includes an upper part in an inclined direction, of an opening of vertical hole drilled in a ground 1 with a sloped surface by adding cement or a cement-based solidification material, and the vertical hole is formed by drilling downward in stages in the surrounded ground including an inner peripheral surface of a horseshoe-shaped ground 3 subjected to the improvement processing, while an inverted lining wall 4 including a concrete material is formed on an inner peripheral surface of the vertical hole, which is repeated each time the drilling at the each stage is completed, and the inverted lining wall 4, which is connected and integrated with the ground subjected to the improvement processing, is formed to the target depth.;COPYRIGHT: (C)2015,JPO&INPIT