Model test device and method for operating highway tunnel lining disease evolution rule

The invention discloses an operation highway tunnel lining disease evolution law model test device comprising a tunnel lining model pouring system used for pouring and forming a lining and forming a cavity and a crack on the lining; the tunnel surrounding rock pouring system is used for pouring and forming surrounding rock, and lining placement space is reserved in the surrounding rock; the tunnel burial depth loading system is used for pressurizing the top of the surrounding rock; the tunnel confining pressure loading system is used for pressurizing the periphery of the surrounding rock; the automobile load simulation system is used for impacting the bottom of the lining; and the monitoring system comprises a strain gauge, a soil pressure sensor, a monitor and a crack observation instrument. The invention further discloses a model test method for the evolution law of the lining diseases of the operating highway tunnel. The device is simple in structure and convenient to operate, can be used for carrying out