| 摘要 |
PURPOSE:To excatly driven a steel tubular pile into a rubber mound by a method in which a pit is drilled in a rubble layer by an auger screw, the auger screw is pulled out, and the pile is driven into the pit. CONSTITUTION:Stones covering the ground of the bottom under water are removed, sand 5 is laid on the ground, sand is supplied into a casing pipe 6, and while keeping the level of the sand in the pipe 9 constant, a rubble mound A is excavated through the pipe 6 by an auger screw 11. When the rubble mound A is thrust, sand is supplied into the excavated pit 12, during which the screw 11 is pulled out and the pipe 6 is also removed. A lower pile 3a is erected into the pit 12 packed with sand and driven by a hammer, an upper pile 3b is welded to the upside of the lower pile 3a and driven to the supporting ground, the sand 5 is removed out, and then the covering stones are again laid on the ground. |
