Pile sinking multi-point loading model test device and method for carrying out water permeability test by using pile sinking multi-point loading model test device

The invention belongs to the technical field of building pile foundation engineering, and provides a pile sinking multi-point loading model test device and a method for carrying out a water permeability test by using the same. According to the technical scheme, the pile sinking multi-point loading model test device comprises a model box with an opening in the upper portion and a counter-force frame, height adjusting mechanisms are installed on the outer walls of two opposite side plates of the model box, and the counter-force frame comprises a counter-force beam and two counter-force side plates; the two counter-force side plates are symmetrically arranged and are respectively arranged on two opposite side plates of the model box through height adjusting mechanisms, two ends of the counter-force beam are respectively connected with the two counter-force side plates, a jack is fixedly arranged on the lower surface of the counter-force beam, and a high-speed camera is arranged on one side of the model box. The