| 摘要 |
<p>PURPOSE: To provide a laying method for an underground buried pipe which is so constituted as to progress a laying work with high efficiency without needing a large scale machine equipment and a great number of labors, save a construction cost and shorten a term of works by suppressing a ditch width to a necessary minimum limit, and eliminate waste of a material by recovering and reutilizing a retaining wall body. CONSTITUTION: A ditch is excavated down to a laying depth for a burying pipe and bag bodies 4 installed in an excavated ditch 1 are filled with fluid. A fluid pressure is set to a value between the active earth pressure and the passive earth pressure and a ditch wall 2 is pressed by the side parts of the bag bodies. A burying pipe is placed on the top surface part of the bag body, the bag bodies 4 are shrunk through discharge of fluid, and the burying pipe is lowered to the bottom part 3 of an excavated ditch as the burying pipe is supported by the bag bodies 4. After the bag bodies 4 are recovered from the excavated ditch 1, the excavated ditch 1 is refilled. The burying pipes are joined together on the top surface parts of the bag bodies 4 expanded to the upper part of the excavated ditch 1.</p> |
