Measuring device for neutral point position of model pile

The invention discloses a measuring device for the neutral point position of a model pile. The measuring device comprises a model box body, a servo motor loading system, a displacement sensor fixing assembly, a pile body displacement measuring system, a pile periphery soil body settlement measuring system and a data processing system. The model box body comprises a model box, a model soil layer and a model pile. The servo motor loading system applies a vertical load to the model soil layer in the test process. The displacement sensor fixing assembly comprises a fixing beam and two fixing pipes, and the fixing pipes are fixedly connected to the bottom of the fixing beam and inserted into the model pile. The pile body displacement measuring system comprises a CMOS image sensor, a grating scale ruler and an illuminating lamp. The pile periphery soil body displacement measuring system comprises a magnetostriction displacement sensor and magnetic scrap iron. The data collection device is connected with the magneto