Device and method for simulating horizontal dynamic load of pile top in field use

The invention relates to the field of field testing of horizontal stress characteristics of a single pile foundation, in particular to a device and a method for simulating horizontal dynamic load of a pile top in field use. The device comprises a fixed connection system, an outer supporting system, a disc loading system, a transmission system, a power system and a loading feedback detection system, wherein the fixed connection system is located at the bottom of the whole device, the loading feedback detection system is arranged between the outer supporting system and the fixed connection system, the disc loading system and the transmission system are arranged in the outer supporting system, the power system is fixed above the outer supporting system and transmits power to the disc loading system through the transmission system, and a protection system is arranged on the outer side of the whole device. The device is convenient to disassemble, assemble and move, the amplitude and frequency are variable, the hor