SOIL BEARING POWER REINFORCING CONSTRUCTION METHOD FOR SOFT GROUND

摘要

PROBLEM TO BE SOLVED: To provide a soil bearing power reinforcing construction method for soft ground, reinforcing soil bearing power of the ground for constructing a comparatively small-scale structure such as a wooden two-storied dwelling house and a light-weight steel structure on it.;SOLUTION: In this construction method, a construction site is drilled and stirred like a reverse circular cone-shape by an excavating and stirring drill 1, and while the reverse circular cone-shaped part is formed into a granular stirred soil layer 12, milk-like soil improvement solidifying material 9 is injected into the excavated and stirred soil layer 12 from a solidifying material jet port 7 and mixed and stirred with the stirred soil layer 12. After excavation to a predetermined depth, the excavating and stirring drill 1 is rotated at the current position without advancing, thereby further mixing and stirring the granular stirred soil layer 12 with the soil improvement solidifying material 9 to form a mixed soil layer. After that, the excavating and stirring drill 1 is reversed, and while the mixed soil layer is left behind in the current position, the excavating and stirring drill 1 is extracted, and the mixed soil layer left behind in the current position is solidified to form a reverse cone-shaped pile 13.;COPYRIGHT: (C)2009,JPO&INPIT