跨中正弯矩区钢箱内上部浇筑混凝土，可解决钢箱梁顶部混凝土受压面积不足的问题；
Concrete is poured on the upper part inside the steel box in the span-center bending moment area to solve the problem of the insufficient pressing area of concrete on the top of the steel box girder;
跨中正弯矩区钢箱内上部浇筑混凝土，可解决钢箱梁顶部混凝土受压面积不足的问题；
Concrete is poured on the upper part inside the steel box in the span-center bending moment area to solve the problem of the insufficient pressing area of concrete on the top of the steel box girder;
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