METHOD OF RE-USING SLURRY IN GROUND IMPROVING CONSTRUCTION WORK.

摘要

The method comprises adding a magnetically permeable substance to the hardening material to be injected and measuring a physical quantity indicative of magnetic permeability of the hardening material to which the substance is added. It also involves calculating the quantity of the hardening material from the measured physical quantity and recovering slurry discharged when executing the ground improving construction work. The method then comprises calculating the quantity of the recovered hardening material after measuring the above-defined physical quantity in recovered slurry and calculating the difference in quantity between the injected hardening material the recovered hardening material. It then comprises injecting the hardening material in a quantity corresponding to the difference.