Device for testing interfacial mechanical properties of piles and foundation soil

According to the testing device for the interface mechanical property of the pile and the foundation soil, two vertical counter-force beams are arranged on the two sides of a lower supporting device,and a horizontal counter-force beam is fixedly connected between the two vertical counter-force beams; the upper end of the test box body is open, test soil is arranged in the test box body, the lowerend is fixedly connected to the upper part of the lower support device, a bearing steel plate is arranged at the upper part of the test soil, and round holes are formed in two side walls; the test pile model penetrates through the test box body and the test soil body through a pair of circular holes; the horizontal pushing device and the displacement sensor are oppositely installed on the outer sides of the two ends of the test pile model, and the telescopic end of the horizontal pushing device is fixedly connected with one end of the test pile model. The vertical loading device is fixedly connected with the horizonta