BACKFILLING TECHNIQUE FOR BURYING DITCH

摘要

PROBLEM TO BE SOLVED: To utilize residual soil by constructing bank bodies with a slurry and highly viscous fluidization treated soil comprising mainly residual soil and back filling a slurry and low viscous fluidization treated soil comprising mainly residual soil between the bank bodies. SOLUTION: A burying ditch 1 is excavated, and a buried matter 3 such as Hume pipe is laid down on a laid sand 2 formed at the bottom part of the burying ditch 1. Next a slurry and highly viscous fluidization treated soil comprising mainly residual soil is sprayed or deposited by a mold work method in the excavation advancing direction of the burying ditch 1 so as to construct a bank body 4. Also a slurry and low viscous fluidization treated soil as backfilling material 5 comprising residual soil is back filled in the burying ditch 1 divided by the bank bodies 4 and 4a. In this case, a buoyancy F generated on the buried matter 3 is cancelled by the self gravities W and W of the bank bodies 4 and 4a so as to stop their rise. The same procedure is repeated so as to bury the buried matter. Thus residual soil for construction can be utilized effectively.