High-speed rail bridge pile foundation long-term dynamic response monitoring system and monitoring method

The invention discloses a long-term dynamic response monitoring system and method for a high-speed railway bridge pile foundation. The monitoring system comprises a pile foundation reinforcement cage assembly, a sensing main reinforcement assembly, a monitoring assembly, a solar cell panel, a fiber bragg grating wireless demodulator, a wireless transmitter, a data processing and analyzing system, a meteorological monitoring station and a client. A high-strength fixed-point densely-distributed strain sensing optical cable and a densely-distributed temperature monitoring optical cable are packaged on a sensing main reinforcement unit to form a sensing main reinforcement assembly. Under the power supply of the solar cell panel, the fiber bragg grating wireless demodulator and the meteorological monitoring station work, the pile foundation axial force, the pile foundation side friction resistance and the pile foundation temperature measured under the train load are transmitted to the data processing and analyzing