近海孤立圆柱基底的局部冲刷试验研究

基于波流共同作用下直立大直径圆柱建筑物周围的局部冲刷机理，通过物理模型试验，研究圆柱基底周围的冲淤形态。利用试验结果，采用量纲分析原理和多元线性回归分析方法，分析各种海洋环境参数对最大冲刷深度的影响，给出波流作用下直立大直径圆柱建筑物周围的最大冲刷深度的预测公式。该公式与原有公式比较，概念清晰、形式简单，可供实际工程中估算类似结构的最大冲刷深度。

STUDY ON LOCAL SCOUR TEST OF THE OFFSHORE ISOLATED CYLINDER SUBSTRATE

Based on the mechanism of local scour around large-sized vertical cylinder under the combined effect of waves and currents, scour processes are investigated experimentally in this paper. Based on the test results, using the principle of dimensional analysis and multiple regression analysis, the effect of the various marine environment parameters on the maximum depth of scour are analyzed. A new predictive formula about the maximum scour depth around large-sized vertical cylinder under the combined effect of waves and currents is also given in this paper. Compared with the original one, the new method is more accurate, simpler and is applicable and reliable in practical projects for similar structures.