METHOD FOR CONSTRUCTING CUTOFF WALL AND METHOD FOR PREVENTING CRACKS IN CUTOFF WALL

摘要

PROBLEM TO BE SOLVED: To provide a method for constructing a cutoff wall which prevents occurrence of shrinkage cracks per se in order to withstand sharp increase in groundwater level, and to provide a method for preventing cracks in the existing cutoff wall constructed by using bentonite slurry.;SOLUTION: The method for constructing the cutoff wall 9 is comprised of the following steps. In the first step, the bentonite slurry prepared by mixing ethanol, water, and bentonite with each other, is injected into strata (1, 3, 5) through which the cutoff wall is constructed, and earth and sand in the ground are agitatingly mixed with the injected bentonite slurry, followed by arranging the resultant mixture so as to have a desired cutoff wall shape, to thereby form a wall structure 7. In the following step, mound 8 for applying a load on the wall structure 7 is formed directly on the wall structure 7.;COPYRIGHT: (C)2002,JPO