| 摘要 |
PURPOSE: A spiral type pressure soil nail is provided to utilize the tensile strength of a nail and improve the frictional force of a main surface, the inner frictional force of soil particles, and the shear strength of the ground by pressure grouting. CONSTITUTION: A construction method of a spiral type pressure soil nail comprises following steps. Spiral type nails(3,6) are installed. A first grouting(4) is performed, so a bulb near to a round is formed. A pull-out test is performed. A second grouting(2) is performed. |
