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拟建的渭南二跨渭河特大桥位于过渡型河段,该河段河身宽浅,滩地宽广,河床易冲易淤,且上下游7．25km范围内已建和在建的桥梁有:沙王渭河大桥、关中公路环线渭河特大桥、渭蒲公路渭河大桥、渭南上涨渡渭河大桥,在该河段组成桥群。为研究大桥修建后,大桥及桥群对桥位河段的影响问题,开展桥位河段模型试验。模拟分析拟建大桥建成后,桥位河段河势演变趋势,桥渡壅水情况,上下游河段的冲淤演变情况和对河道行洪等方面的影响,是渭南二跨渭河特大桥修建成功与否及健康运行的关键所在。
The proposed Weinan two-span Weihe River Super-Large Bridge is located in the transitional section of the river. The section of the river is wide and shallow, the beach is broad, and the river beds are easily silted. The bridges under construction and under construction in the upper and lower reaches of 7.25km include sand Wang Wei River Bridge, Guanzhong Highway Ring Weihe River Bridge, Wei Po Highway Weihe River Bridge, Weinan crossing Weihe River Bridge, in the reach of the bridge group. In order to study the impact of the bridge and bridge group on the bridge section after the construction of the bridge, the bridge section model test was carried out. After the completion of the proposed bridge, the trend of the river regime in the bridge section, the situation of the bridge crossing water, the evolution of the scouring and silting in the upstream and downstream reachs and the impact on the flood discharge of the river are simulated and constructed. Success or failure and healthy operation of the key.