| 摘要 |
<p>PURPOSE:To raise the efficiency of pipe connecting work for mud water construction method, etc., by a method in which metal tools to be attracted are provided to pipes to be connectted, an attracing means with an adsorptive portion is extended in a manhole, and a connecting pipe is attracted by a magnet and connected with the pipe to be connected. CONSTITUTION:A pipe 9 to be connected is derived into mud water 1 by a crane 10 while monitoring the position of a position-confirming bar 13. At a time when a pipe 4 to be connected coincides with the axis of the pipe 9, an operating wire 5b is sent out of a manhole 3, an electromagnet 5a is contacted with a metal tool 11 to be attracted, the operating wire 5b is pulled out of the manhole 3, and the pipe 9 is directed to the pipe 4 to be connected for connection. After the mud water is hardened, the crane 10 is disconnected from a power source 10 and pulled up, the attractive action of the electromagnet 5a is stopped, and the attractive means 5 is removed.</p> |
