Abstract: In accordance with the date obtained from the expriment of the model which refers the form of bridge column , arch block and spandrel structure , angle between master stream and normal direction of the axis of Heyang Bridge above the Jialingjiang River , a formula of coefficient of local resistance contained the parameter of dimensions , number , submerging hight , etc .of the column is established in this paper .The formula can be for referrence before calculating of the rising surface curve of similar bridges

Key words: Heyang Bridge , coefficient of local resistance , rising surface curve

摘要： 针对合阳嘉陵江大桥桥墩及拱圈形状结构，通过水槽实验，建立了在不同桥墩形状、桥墩数目、淹没水深、 水流与桥轴线法向夹角等影响因素综合作用下，桥梁局部阻力系数公式。可供今后类似桥型桥梁洪水壅水曲线计 算时参考。

关键词: 合阳嘉陵江大桥, 局部阻力系数, 壅水曲线