| 摘要 |
PROBLEM TO BE SOLVED: To provide an excavation method and the like, which enable efficient execution of ground excavation work.SOLUTION: After a cylindrical cut-off wall 10 reaching an impermeable stratum is constructed in ground 1, a wall body 20 for excavation, in which a wall body member 21 is assembled in a cylindrical shape, is lowered inside the cut-off wall 10 depending on the excavation of the ground 1 inside the cut-off wall 10. Thus, the ground 1 is excavated. A structure 30 is constructed in an excavation location 1b where the excavation is performed in this way. Subsequently, the wall body 20 for the excavation is sequentially dismantled from a lower end, and the periphery of the structure 30 is backfilled while the individual wall body member 21 is recovered. |
