关键词: 方向电路, 坡道延续, 监督区间, 发车锁闭

Abstract: During the construction transition period from semi-automatic block of single track to automatic block of double track, the interlocking software replacement is required because one track has not been laid and the station turnout insertion and paving are carried out in advance, etc. In order to reduce the construction transition and the construction cost, the semi-automatic block mode of the single-track railway is transformed into the automatic block mode of the single-track railway in the forward direction and the automatic inter-station block mode in the reverse direction, that is to say, the section track circuit carries out operations for changing the running direction frequently. At this moment, if there is a down grade successive route and so on, it is easy to cause the direction change failed because of the inherent problems of the four-wire directional circuit, which leads to the station attendant mistook the equipment for fault and further causes the equipment fault with long time delay and greatly interferes with normal transportation. This paper analyzes the equipment fault cases and puts forward improvement suggestions for reference of signaling staff.

Key words: directional circuit, grade successive route, supervised section, departure locking