往复海流作用下桩基局部冲刷及海底沉积物粒度变化  

Scour and Sediment Particle Size Change Around Pile Base Acted by Rectilinear Current

作　　者：董斌[1] 边淑华[2] 刘建强[2] 金永德[2] 胡泽建[2] 

机构地区：[1]中石化胜利油田分公司海洋采油厂,山东东营257237 [2]国家海洋局第一海洋研究,山东青岛266061

出　　处：《海岸工程》2009年第2期1-8,共8页Coastal Engineering

基　　金：山东省博士基金资助项目--黄河三角洲粉砂质海底桩基冲刷的动力机制(2006BS07004)

摘　　要：根据胶州湾海湾大桥现场试桩结果,对海流作用下桩基局部冲刷进行了研究。通过对桩柱附近实测海流以及试桩前后桩柱周边海底沉积物粒度变化联合分析,发现桩柱竖立后,桩柱根部优势流迎流面发生局部冲刷,侧面和背流面发生局部淤积。桩柱附近海底沉积物粗化,且根部优势流迎流面海底沉积物粗化最为明显。说明桩柱竖立后,细颗粒物质迁移,使桩柱附近海底发生冲淤变化。Based on the results from the tested-pile experiment on the site for Jiaozhou Bay bridge, the oceanic current scour around the pile base is studied. Both the current observational data and the sedimental particle size change which takes place after the tested-pile has been set up are analyzed. It is learnt from the analysis that the sedimental scour takes place in the pile side against the dominant current and the deposition in the lateral sides and the down-current side. The sedimental particles become coarser around the pile base and much coarser in the pile side against the current. Therefore it is expounded that the sedimental scour does take place around the pile base after the pile has been set up and the finer particles have been moved a way from the pile base.

关 键 词：桩基冲刷 粒度变化 淤泥质粉砂 潮流作用 现场观测 

分 类 号：P736.2[天文地球—海洋地质]