| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a construction method of a cofferdam cum steel pipe sheet pile foundation which can reduce a cutting removal cost and material cost of a steel pipe sheet pile constituting a partition wall when the partition wall is provided in a sunk well constituted of the steel pipe sheet.SOLUTION: A construction method of a cofferdam cum steel pipe sheet pile foundation comprises: a steel pipe sheet pile placement step of placing steel pipe sheet piles 10 (10a, 10b) and forming a sunk well; a peripheral wall forming step of forming a peripheral wall S for constituting the sunk well by placing two or more peripheral wall components constituted by connecting the steel pipe sheet piles 10 (10a, 10b) in the ground; and a partition wall forming step of forming a partition wall W defining the inside of the peripheral wall S by placing two or more partition wall components constituted by connecting the steel pipe sheet piles 10 and a plier pile 20 in the ground before or after the peripheral wall forming step or concurrently. The construction method also includes a plier pile removal step of removing the plier pile 20 for constituting the partition wall components before or after an excavation step in the sunk well for excavating the inside of the sunk well or concurrently.</p> |
