桩柱周围海底冲刷深度计算及动力参数的选取

通过６０年代以来研究的桩柱周围海底冲刷深度计算模式的对比分析表明,我国学者王汝凯等人提出的“普遍冲刷深度”、“局部冲刷深度”和“总冲刷深度”的计算模式在科研和生产实践中是可行的,能给设计和施工提供科学的和有价值的参数。各种冲刷深度的计算模式如下：普遍冲刷深度ｌｇ（Ｓｕ０／ｎ＋０．０５）＝－０．６６３＋０．３６４９ｌｇα（１）局部冲刷深度ｌｇ（Ｓｕ１／ｈ）＝－１．２９３５＋０．１９１７ｌｇβ（２）总

THE CALCULATION OF SEA BOTTOM SCOUR DEPTH AROUND PILES AND THE SELECTION OF DYNAMIC PARAMETER

Through the comparison analysis on the calculation models of sea bottom scour depth around piles presewed since 1960' s, the calculation model of "general scour depth"," local scour depth"and"total scour depth"that put forward by Chinese scholar Wang Rubal is effective to scientific research and practical application. The model com provide the scientific and valuable parameters for designing and manufacturing. The calculation model for each scour depth is shown as below The general scour depth The local scour depth The total scour depth In above equations The comparison between the calculated result by Wang Rukai's model and the actual data. of sea bottom scour depth showed that the dynamic parmeters whose retun periods are 10 years should be rsed in the calculation of the scour depth for the engineering' s safety,and the situ measuresd bottom flow speed data in-situ should be specially emphasized.