Foundation pit heaving model experimental device and method

The invention discloses a foundation pit heaving model experimental device. The foundation pit heaving model experimental device comprises a model box and a liquid container. The liquid container is communicated with the bottom of the model box through a connecting pipe. The model box is internally provided with two parallel model plates and supporting rods used for supporting the model plates. A suspension gap is formed between the lower ends of the model plates and the bottom surface of the model box. A partition board is arranged in the suspension gap. Small holes are arrayed in the partition board. A communicating port between the connecting pipe and the model box is located below the partition board. The invention further discloses a foundation pit heaving model experimental method. According to the foundation pit heaving model experimental device and method, the model box and the model plates are arranged, the model plates are vertically mounted in the model box, and silty clay is solidified on the partition board in a layered mode; water is injected into the liquid container, and then an foundation pit heaving model experiment can be carried out on the silty clay in the model box; the foundation pit heaving model experimental device and method have the advantages of being easy to operate and good in accuracy and repeatability.