The utility model discloses a long-distance variable cross-section concrete structure box
culvert formwork
supporting system which comprises an outer formwork and an inner formwork, the outer formwork comprises outer side formworks symmetrically arranged above a lower
cushion layer, an upper cover plate is arranged on the two outer side formworks, and the inner formwork comprises an inner top formwork connected with the upper cover plate through a screw. The inner top template is sequentially connected with the inner side template and the inner bottom template, the end side templates are arranged on the end sides of the outer template and the inner template for sealing, the upper cover plate is a connecting channel steel, the end side templates are aluminum
alloy templates, and the outer side template, the inner top template, the inner side template and the inner bottom template are formed by combining and splicing the aluminum
alloy templates and the connecting channel steel. The two side plates of the connecting channel steel are connected with the aluminum
alloy formwork through fasteners, and the end sides of the connecting channel steel are connected with the adjacent connecting channel steel through fasteners. One-time pouring forming of each section of the variable cross-section small box
culvert is achieved, the construction time is shortened, the construction investment is reduced, and construction seam reserving, seam jointing, slab staggering and other
engineering quality defects are avoided.