| 摘要 |
PURPOSE:To shorten a working period and improve precision, by a method wherein, after assembling and welding work of a main gate is completed beforehand, it is moved to an installation position and secured thereto, whereafter concrete is placed at a stroke from the upper position of the main gate. CONSTITUTION:Rails 2 are first installed at a downstream or an upstream side of an installation position of a dam main gate 1 and within a working area of a crane, a truck 3 is placed thereon, and an assembling and a welding work of outlet works 4, a doorstop 5, a door body 6, and a buffering plate 7 are completed on the truck 3 to form the main gate 1. The rail 2 is extended, the truck 3, whereon the main gate 1 is placed, is moved to an installation position, and after it is positioned to a given height, it is placed and secured to a dam concrete. Simultaneously, concrete is deposited at a stroke from the upper position of the main gate 1. |
