WOVEN FABRIC PLATE PLACING STRUCTURE OF THE LOWER END OF FILTERING VERTICAL DRAIN FOR PREVENTING AN INFLOW OF SOFT CLAYEY SOIL

摘要

PURPOSE: A woven fabric plate placing structure of the lower end of a filtering vertical drain for preventing an inflow of soft clayey soil is provided to execute construction works simply and easily and to make dehydration smoothly. CONSTITUTION: The woven fabric plate placing structure of the lower end of a filtering vertical drain for preventing an inflow of soft clayey soil comprises the steps of: boring vertical holes(2) in the soft ground(1) using a boring machine; installing a filtering vertical drainpipe(4) in the vertical hole(2) to be a filtering vertical drainpipe(4) in a steel tube(3) and the lower end of the steel tube(3) is formed in the structure of a hopper type lower end(3a) narrowed downward; installing an anchor plate provided with hanging/bending part on the top of a flat plate under the filtering vertical drainpipe(4); putting a woven fabric plate(6) from the hanging/bending part to the flat plate; and fitting a woven fabric plate(6) in the lower end of the filtering vertical drainpipe(4).