| 摘要 |
<p>PURPOSE:To permit a pipe line to safely further promptly perform its laying work by dropping down a long pipe along the slope of a groove to its bottom thereafter moving the long pipe in the groove to its laying position while passing through under mine timbering. CONSTITUTION:A surface of the ground between sheet piles 14, piled into the ground and forming both side walls, is excavated, and forming a groove 11 being supported by mine timbering 15 between the sheet piles 14, a sloped surface 10 is formed in one end of this groove 11 successively to its bottom. A long pipe 18, after it is dropped along the sloped surface 10 to the groove bottom from the ground surface, is moved to a laying position in the groove 11 while the long pipe passes through under the mine timbering 15.</p> |
