| 摘要 |
PURPOSE:To provide chemical resistant cut off, by a method wherein, after a sheet is stretched between the interior of a cylindrical longitudinal guide in a preceding element and the outer periphery of a cylindrical longitudinal guide surrounding the longitudinal guide of the rocking pipe of an excavating element, concrete is placed. CONSTITUTION:A rocking pipe 1b with a longitudinal guide 2a is driven in the forward end of excavation of a wall-like hole 3b in the element of an underground continuous wall, and a longitudinal guide 2b having a joint deformation preventing member 4b is inserted into the longitudinal guide 2b. Further, a cylinder longitudinal joint 8b is inserted in a manner to surround the preventing member 4b. A chemical resistant cut off sheet 6b is stretched around the interior of the longitudinal joint 8b, being cast in a preceding element, and the outer periphery of a longitudinal joint 8a, and the interior of the longitudinal joint 8b is filled with grount 12. Concrete 10b is then placed in an element 3b. This enables provision of resistance to chemical for the underground continuous wall. |
