CONSTRUCTION APPARATUS FOR HYDRAULIC SOLIDIFICATION MATERIAL LIQUID-SUBSTITUTED COLUMN, CONSTRUCTION METHOD FOR HYDRAULIC SOLIDIFICATION MATERIAL LIQUID-SUBSTITUTED COLUMN, AND HYDRAULIC SOLIDIFICATION MATERIAL LIQUID-SUBSTITUTED COLUMN

摘要

PROBLEM TO BE SOLVED: To enable an increase in in-ground vertical bearing capacity of a hydraulic solidification material liquid-substituted column and an increase in surface friction against fill-up ground and push-in bearing capacity.SOLUTION: An upper part of an excavation rod, in which an excavation head having a discharge opening for a hydraulic solidification material liquid is connected to a lower end, is formed into an inverted cone-shaped part having an outside diameter increased upward from below, and a spiral blade is fixed to an outer peripheral surface of the inverted cone-shaped part.