Additional strength manner of the soil layer side wall and digging the construction mannered null ground of the aisle

摘要

PROBLEM TO BE SOLVED: To make it possible to take sufficient time for a work of impregnating with a chemical liquid by installing a molding frame to face a wall surface or a slope face formed by digging the ground with a gap between the molding frame and the side wall, filling the gap with granular material such as sand, and injecting the chemical liquid into the granular material. ;SOLUTION: Water stopping walls 2 are constructed on both ends of display portions of both side walls 1a of a trench 1 formed by digging a ground E. The bottom of the trench 1 is covered with a concrete floor 3. A concrete block 5 is placed in the center of width of the trench 1 on the concrete floor 3 with a specified gaps relative to the side walls 1a. The gaps between the block 5 and the side walls 1a are filled with sand dropped into the gaps. Chemical liquid is sprayed on the sand by means of a pipe with many holes. After being sprayed, the chemical liquid permeates through gaps in the sand into the side walls 1a according to its static pressure and elapsed time to form sufficiently thick, solidified body to make the side walls 1a firm.;COPYRIGHT: (C)1998,JPO