CONSTRUCTION METHOD OF WATER CUT-OFF WALL INSTALLING WELL AND WATER CUT-OFF WALL INSTALLING WELL

摘要

PROBLEM TO BE SOLVED: To provide a construction method of a water cut-off wall installing well and the water cut-off wall installing well constituted so as to be capable of securing desired underground water treatment by easily arranging the water cut-off wall installing well in bedrock of a water permeable layer under proper cleaning.;SOLUTION: In this construction method of a water cut-off wall installing well and the water cut-off wall installing well, a water cut-off wall is constructed on the upstream side and the downstream side of a structure built in an underground water permeable part. Before solidifying the water cut-off wall, an opening part 16 is press-fitted to the excavating bedrock by extending a jack 5 by suspending the water cut-off wall installing well 1 for construction composed of a filter chamber 13 facing the opening part 16 of a front face and filled with a low strength solidifying body 4, a space 34 in the rear of the filter chamber, a vessel 3 composed of a cleaning pipe 8 and a catchment pipe 2 and the expandable jack 5. A filter material 14 is inputted in the filter chamber 13 after cleaning and removing the low strength solidifying body 4 and a soil cement film 81 of the water cut-off wall by high pressure jet water 38 from the cleaning pipe after curing the water cut-off wall.;COPYRIGHT: (C)2004,JPO&NCIPI