| 摘要 |
PURPOSE:To easily construct a cut-off wall under the ground by a method in which water-stop sheets laid between a number of steel struts are set to partition in the widthwise direction the trench, and a hardener is injected into the trench. CONSTITUTION:A trench 1 is excavated in the ground and mud water 2 is packed into the trench 1. A water-stop sheet 3 incorporated with a packer 6 is laid tensely between a number of steel struts 4 and lowered with the struts 4 into the trench 1 in a fold state. The sheet 3 is sent out and set to partition the widthwise direction of the trench 1. Air is injected into the packer 6 of the sheet 3 to partition the trench 1. A hardener is then injected into the trench 1 to solidify the mud water 2.
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