在安装通讯及电力线路,并需要把导线或电缆穿入预埋的管道中时,目前施工的习惯方法是先把钢丝穿入管路里,再由钢丝把电线或电缆带出。这种办法在穿越短距离尚可,但是在长距离时比较困难。下面介绍一种新的施工方法,经多年施工证明,该方法既可以解决长距离穿不进线的难题,还可节约人力,具体做法简介如下。 In the installation of communication and power lines, and the need to pass wires or cables into a pre-embedded pipeline, the current method of construction is to put the steel wire into the pipeline first, and then bring the wire or cable out of the wire. This approach is acceptable across a short distance, but it is difficult at long distances. The following describes a new construction method. After many years of construction, this method can solve the problem of long-distance access to the line and save manpower. The specific methods are as follows.