【摘 要】
：
桥梁水毁大多因桥墩局部冲刷所致,桥墩局部冲刷深度的可靠预测是保证桥梁安全运行的基础。国内外对河流上的桥墩局部冲刷做过大量研究,建立了可供设计使用的桥墩局部冲刷计算
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桥梁水毁大多因桥墩局部冲刷所致,桥墩局部冲刷深度的可靠预测是保证桥梁安全运行的基础。国内外对河流上的桥墩局部冲刷做过大量研究,建立了可供设计使用的桥墩局部冲刷计算公式。对于河口海湾及沿海地区跨海湾桥梁,其作用水流多为极其复杂的双向潮流,原有公式常难以适用。利用水槽试验成果结合其他河口海湾地区的相关研究成果,通过量纲分析及多元回归法建立了潮流作用下桥墩局部冲刷的计算公式。该公式结构简单,参与多元回归分析的数据多,各参数的取值范围均较广,并应用大量现场实测资料以及其他河口海湾及近海地区桥墩、人工岛、塔基等构筑物的试验值进行了较好验证,可供河口海湾及近海地区相关工程局部冲刷深度估算时参考应用。
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