| 摘要 |
PURPOSE:To build a continuous wall being completely cut off, by a method wherein a sheetlike cut off member is placed in a wall-shaped hole and the first half part of the cut off member is buried in concrete, and after concrete is cured, a second half part thereof is lifted up and a new cut off member is joined therewith. CONSTITUTION:A wall-shaped hole 1a for a preceding element is excavated as an excavated surface is protected by means of bentonite muddy water, and rocking pipes 2 are driven in the end part of the wall-shaped hole 1a. After a sheetlike cut off member 3a, having resistance to chemical and water impermeability, is located in the wall-shaped hole 1a, a partition form 4 additionally functioning as an erecting form is inserted, the middle of the cut off member 3a is nipped, and concrete 5a is placed on the side in a direction reverse to that of excavation from the partition form 4. After curing, the partition form 4 is removed, the end part of the cut off member 3a is lifted up to a ground surface, a cut off member 3b for a next section is watertightly joined therewith, and execution for the next section is effected. |
