TREATMENT OF SURPLUS EXCAVATED SOIL

摘要

PROBLEM TO BE SOLVED: To treat a surplus excavated soil discharged from ground by, e.g. excavation in civil engineering works so that a homogeneous and high-strength solidified material can be obtained without causing shrinkage on drying and the soil can be effectively utilized for a back-filling material. SOLUTION: An excavated soil in driving technique, a discharged soil in land exclamation, an excavated soil in installing a buried pipe, or a surplus excavated soil comprising, e.g. a discharge in burying or constructing an underground structure is mixed with a solidifying material comprising a slag, a water glass and/or sodium aluminate, and if necessary, a cement and/or lime, and the mixture is allowed to solidify. In addition, the excavated soil is mixed with the solidifying material, and the mixture is filled in a back-filling part and hardened to thereby realize the utilization as a back-filling material.