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本文介绍主跨为220米的预应力混凝土斜拉桥——黄河公路桥。 该桥采用密索、A型塔、40+94+220+94+40(米)五孔连续、悬浮体系,获得明显的经济效果。三向预加应力的主梁高2.75米,横断面为带风咀的半封闭双室梯形箱。镀锌平行钢丝束组成的斜拉索和高疲劳性能冷铸锚均为工地自制。用内力平衡法计算恒载,斜拉索一次张拉至设计最佳初始张拉力。主梁用挂篮施工,自两桥塔同时向两侧悬臂浇筑。 文中还介绍了施工控制方法和成果。
This article describes the main span of 220 meters of prestressed concrete cable-stayed bridge - the Yellow River Bridge. The bridge with dense cable, A tower, 40 +94 +220 +94 +40 (m) five holes continuous suspension system, access to significant economic benefits. Three-way prestressed girder 2.75 meters high, with a cross section of the windy Tsui closed double-chamber trapezoidal box. Galvanized parallel steel wire bundle consisting of stay cables and high fatigue properties of cold cast anchors are site-made. The internal force balance method is used to calculate the dead load. The stay cable is tensioned once to design the best initial tension. The main beam with a hanging basket construction, from the two towers at the same time to both sides of the cantilever pouring. The article also introduced the construction control methods and results.