Intelligent monitoring and precise positioning method for full-section differential settlement at road and bridge joint

The invention belongs to the field of road and bridge monitoring and positioning, particularly relates to an intelligent monitoring and accurate positioning method for full-section differential settlement at a road and bridge joint, and provides the following scheme aiming at the problems that soil settlement and a void area position at the lower part of a bridge end transition slab are difficult to judge and the soil settlement condition is difficult to quantify in the prior art. The method comprises the following steps: S1, installing a radio frequency card and a displacement sensor, and laying a stress sensing optical fiber; s2, monitoring a radio frequency card signal, and if the radio frequency card signal is lost, indicating that differential settlement occurs; s3, monitoring the pressure borne by the stress sensing optical fiber, transmitting monitoring data to a control center, comparing the monitoring data with preset initial data of the control center, and if the pressure is reduced, indicating that