Combining with the Qinhe big Bridge engineering characteristics and big bridge design indexs, this paper introduced the bridge site hydrogeology conditions, made analytical calculation from the general scouring and local scouring two aspects, drew valid conclusions, so as to effectively guide similar bridge construction.%结合沁河大桥工程特性及大桥设计指标，介绍了桥址水文地质条件，从一般冲刷与局部冲刷两方面进行了冲刷分析计算，得出有效结论，从而有效指导类似桥梁施工。
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