Improved soil compounding test method for auxiliary water construction at the time of intrusion, and earth removal type deep mixing treatment method

摘要

To make it possible to perform improved soil mixing treatment in which an amount of auxiliary water discharged to a ground is accurately controlled, and to comprehend an accurate strength in a ground improvement.SOLUTION: There is provided an earth removing deep mixing treatment method including: a step of using an improved soil blending test method including a step of, in steps S1, S2, S3, performing a primary agitation of mixing sample soil of a specified amount with water of an amount of auxiliary water discharged toward the ground in penetration of a rotary rod having an agitation blade by an earth removing deep mixing treatment device and forming water content sample soil of the specified amount and a step of, in steps S4, S5, S6, forming improved soil sample by performing a secondary agitation of mixing the water content sample soil of the specified amount with a hardener and setting an amount of auxiliary water in the penetration of the rotary rod based on analysis results of the improved soil sample; and a step of discharging water of the set amount of the auxiliary water from a discharge port provided in the agitation blade toward the ground and making the rotary rod penetrate with controlling the amount of the auxiliary water at each excavation depth.SELECTED DRAWING: Figure 1