| 摘要 |
PURPOSE:To efficiently drain water in a banking layer, by a method wherein a watert permeably sheet is laid to the back of a block and plural water permeable sheets are horizontally laid in a banking layer to guide gap water in the banking layer to the surfaces of retaining wall blocks. CONSTITUTION:A water permeable sheet 1 is laid on a foundation surface G to the back of a bse concrete 10, and base concrete blocks 2 are laid in one row on the base concrete 10. Water permeable form panels 3 are framed upright to the back of the blocks 2, and concrete D is placed to form the blocks 2 into an integral structure. A banking layer G1 is formed on the water permeable sheet 1, which is laid on the banking layer G1 and in concrete for blocks 2. The blocks 2 re built by following the same procedures to form a banking layer at the backs of the blocks. This process enables promotion of darainage of the banking laeyr and reduction of the earth pressure of the banking layer. |
