Method for measuring cohesive soil body deformation in geotechnical centrifugal model test

The invention provides a cohesive soil deformation measuring method in a geotechnical centrifugal model test. The cohesive soil deformation measuring method comprises the following steps that (10) a cohesive soil foundation model is prepared; 20) drawing a deformation mark on the surface of the clayed soil foundation model by using an oily pigment, and shooting by using a camera to obtain a soil body image before deformation; (30) a centrifugal test is conducted on the clayed soil foundation model with the deformation mark, and a camera is used for shooting to obtain a soil body image in the deformation process; and step 40) according to the soil body image before deformation and the soil body image in the deformation process, analyzing by using a PIV technology to obtain a deformation vector diagram of the cohesive soil body. According to the method for measuring the deformation of the cohesive soil body in the geotechnical centrifugal model test, provided by the invention, a deformation mark can be quickly