在美国北加里福尼亚(Northern California)州跨越斯坦尼斯劳斯(stanislaus)河的帕罗茨桥(Parrotts Ferry)是就地分段灌筑混凝土箱形梁桥的典范。 这座异常高而优美的桥的主跨为195米(640英尺),是迄今为止在美国使用分段悬臂灌筑方法施工的最长桥跨,也是世界上最长跨度的轻质混凝土箱形梁桥。该桥在上部结构中使用了轻质混凝土,这是一个少有的设计特点,同时也显示了它在桥梁设计和建造中的相 The Parrotts Ferry across the Stanislaus River in the Northern California state of the United States is an example of in-situ segmented concrete box girder bridges. The exceptionally tall and graceful bridge, with a main span of 195 meters (640 feet), is by far the longest bridge span constructed using stanchions in the United States and is the longest span lightweight concrete box in the world Beam bridge. The bridge uses lightweight concrete in the superstructure, a rare design feature that also shows the phase of its design and construction in the bridge