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在天井吊罐掘进施工中,吊罐上的施工人员与上部绞车和下部辅助人员的双路信号通讯联系,一直是采用信号和电话这样两套专用线路。线路是通过其它井、钻孔或利用施工钻孔达到上部,这样的线路经常因施工而产生各种断路故障。特别是利用施工钻孔下放信号电缆的方法故障就更多,因为电缆经常地与钻孔壁、钢丝绳连碰带磨,有时与钢丝绳搅在一起,致使电缆破损、甚至断裂。故障的排除是很麻烦的,
In the tunnel crane construction, the two-way signal communication between the construction personnel on the crane tank and the upper winch and the auxiliary personnel at the lower part of the yard has been using two dedicated lines such as signal and telephone. Lines are drilled through other wells, drilled, or drilled to the upper part of the line. Such lines often cause a variety of open circuit faults due to construction. In particular, there is more trouble with the method of using the construction drilling to drop the signal cable, because the cable often touches the wall of the drilling hole and the wire rope, sometimes it is mixed with the wire rope, causing the cable to break or even break. Troubleshooting is very troublesome,