| 摘要 |
PURPOSE:To ensure strength and cut-off properties of a landslide protection wall, by a method wherein a vertical hole is excavated as cement milk is poured, an integral one-piece structure, in which a guide member is mounted on a steel pipe by means of a steel material, is inserted therethrough, and a subsequent vertical hole is excavated. CONSTITUTION:A vertical hole is excavated by means of an earth auger 1 as cement milk is poured in a ground. An integral one-piece structure, consisting of a steel pipe 6, which is integrally mounted in series to the lower end of an H- steel 3 and has recess and projection cut-off parts 4 and 5, and a guide member 7 is inserted through the vertical shaft. When installation of plural integral one- piece structures is completed, the guide member 7 is pulled off of the vertical shaft for removal to build a continuous pillar-shaped landslide protection wall. This allows for ensurance of enough strength and cut-off properties required for groundwater layer, and enables to perform a reliable and excellent work to join together the cut-off parts of the adjoining steel pipes. |
