Alarm system for excessive accumulated water in underneath pass tunnel

The utility model provides an alarm system for excessive accumulated water in an underneath pass tunnel. The alarm system comprises a controller, an A/D converter and a display screen which are respectively connected with the controller, and a first accumulated water depth sensor and a second accumulated water depth sensor which are respectively connected with the A/D converter. According to the utility model, the design is adopted; the problem that the accumulated water depth in the underneath pass tunnel cannot be displayed at the entrance of the tunnel in real time is solved; and the drivercannot be informed of the accumulated water depth of the underneath pass tunnel and whether the underneath pass tunnel can pass safely or not in real time before the vehicle enters the underneath pass tunnel, and the problems of vehicle flameout and safety accidents caused by the fact that the driver blindly enters the underneath pass tunnel with too deep accumulated water are effectively avoided. The device is simple in