(2) The transverse distribution coefficient of vehicle load on the upper carriageway slab is calculated theoretically by the hinged slab beam method at the midspan, and the fulcrum is calculated by the lever method. The effect of angle on transverse distribution coefficient of skew plate is considered. (3) For the same span, slope and the same vehicle load level, the maximum transverse distribution coefficient value caused by different deck widths is taken as the control design value for the middle plate, and the transverse distribution coefficient value caused by different deck widths is taken as the control design value for the side plate. (4) Under the operation state, the slab beam is designed according to the structural stress of precast slab, hinge joint and 50mm thick cast-in-place integrated concrete layer. (5) Wide and deep hinged joints shall be used. Reinforcement shall be arranged in the hinged joints and bound with the protruding reinforcement of the precast slab. The protruding reinforcement of the adjacent slab shall be welded at the upper edge of the hinged joints to prevent cracks, water seepage and external climbing of the slab. (6) The top surface of precast slab shall be provided with U-shaped shear reinforcement, which shall be firmly fixed with the roof reinforcement during pouring. (7) Bridge deck pavement: divided into two layers, the lower layer is 100mm cast-in-place C40 waterproof concrete, and the upper layer is 100mm asphalt concrete. The corner reinforcement resisting the negative bending moment of the inclined plate is set in the cast-in-place waterproof concrete layer.