正在修建的齐齐哈尔嫩江公路大桥位于齐齐哈尔附近,该江段流域系平原宽滩河流。为了合理确定桥位和桥孔长度,先后选择5个桥位方案,做了4个桥位方案的水工模型实验(包括定床和动床),各桥位通过设计流量,按各种桥长布孔,确定桥前壅水高度和回水长度,调治构造物设置等,最后选择的桥位既满足城市防洪堤的壅水高度和回水长度的要求,同时又能在通过设计流量的情况下,使其河道稳定,冲刷较浅,调治构造物设置得合理。 The Qiqihar Nenjiang River Highway Bridge under construction is located near Qiqihar. The river basin is a plain river beach. In order to reasonably determine the length of bridges and bridge openings, five bridge schemes were selected one after the other, and four hydraulic bridge models (including fixed bed and movable bed) were designed. Each bridge site was designed by flow rate, The final choice of bridge position not only meets the requirements of the sluice height and backwater length of the flood control embankment in the city, but also can pass the design flow conditions Under, so that the river stable, shallow erosion, regulating structure set up reasonable.