Monitoring and repairing device for arch rib coating of tied-arch bridge

The invention relates to a tied-arch bridge arch rib coating monitoring and repairing device which comprises a base, an aggregate spraying device arranged on the base, a moving device arranged on the bottom face of the base and a monitoring device arranged on the base, and the monitoring device comprises an ultrasonic thickness detector and a control system. The ultrasonic thickness detector is used for detecting the thickness of an arch rib coating of the tied-arch bridge and sending a thickness signal to the control system, the control system is in signal connection with the aggregate spraying device and the moving device, and the control system is used for judging whether the aggregate spraying device is started or not according to the received thickness signal; according to the device and the method, the technical problem that in the prior art, a high-speed railway tied-arch bridge arch rib coating is difficult is solved, and the coating repairing safety is improved. The device and the method have the ben