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双曲拱桥的主拱圈普遍存在整体性差,承载能力不足的缺陷。现浇钢筋混凝土底板的目的就是在主拱圈的主拱肋底缘现浇钢筋混凝土薄板,把双曲拱改造为箱型拱,使得主拱圈的截面面积增大,截面形心高度降低,进而提升主拱圈抵抗正、负弯矩的能力。从而提高其承载能力同时使整座桥梁上部结构形成牢固的整体。
The main arch of the hyperbolic arch bridge generally has the defects of poor integrity and insufficient carrying capacity. The purpose of the cast-in-place reinforced concrete floor is to cast the reinforced concrete thin plate on the bottom edge of the main arch rib of the main arch ring and transform the double-arch arch into a box-shaped arch so as to increase the sectional area of the main arch ring and reduce the height of the cross- Thereby enhancing the ability of the main arch to resist positive and negative bending moments. Thereby increasing its carrying capacity while allowing the entire bridge superstructure to form a solid whole.