There are many specific models of tunnel second lining trolley, which depend on the construction structure in actual use. \x0d\ Generally speaking, tunnel lining trolleys can be divided into: ordinary highway single-track trolley, ordinary highway double-track trolley, expressway double-track trolley, ordinary railway single-track trolley, high-speed railway trolley, water conservancy and hydropower diversion tunnel trolley, mine roadway trolley, subway lining trolley and inner and outer formwork lining trolley according to different structures. \x0d\\x0d\ According to the specific lining length of tunnel second lining trolley, it can be generally divided into: 6m, 9m, 12m, 15m, etc. The specific length of the second lining trolley depends on the curvature of the tunnel in actual construction. \x0d\ To sum up, the specific model of the tunnel second lining trolley is subject to the camber and section size of the actual construction structure.