Device and method for measuring horizontal deformation coefficient of soaked and humidified loess

The invention discloses a device and a method for measuring a horizontal deformation coefficient of loess after soaking and humidifying. The device comprises a cylindrical shell with a cavity, the shell comprises a top cover, a side wall and a base, a circular step is arranged at the center of the bottom face of the top cover and the center of the top face of the base, an annular sample is placed in the shell, the inner circle diameter of the annular sample is the same as that of the step, and an upper permeable stone plate and a lower permeable stone plate are arranged at the top end and the bottom end of the annular sample respectively. The upper permeable stone slab and the lower permeable stone slab are respectively located between the top and bottom of the side wall and the side wall of the step, the side wall is provided with side wall permeable holes at the lower permeable stone slab, the top cover is provided with top cover water injection holes at the upper permeable stone slab, and the center of the