海上不同结构形式桩基对水流的影响  

Effect of different structural forms of marine pile foundations on flow

作　　者：杨娟[1] 王卫远[1] 何倩倩[1] 赵建春[1] 

机构地区：[1]中国水电顾问集团华东勘测设计研究院有限公司,浙江杭州310014

出　　处：《水利水电科技进展》2014年第1期32-36,共5页Advances in Science and Technology of Water Resources

摘　　要：为了研究不同结构形式桩基对水流的影响规律,建立三维数值模型,采用直接模拟法将桩基作为不透水边界处理,利用三角形加密网格精确模拟桩基形状,计算分析不同结构形式桩基影响下水位和流速的变化。结果表明:桩基引起的水流变化主要表现为桩基上游水位壅高,下游水位跌落,在桩基两侧流速较大,上、下游流速较小;不同结构形式桩基的流速变化分布略有不同,三桩导管架基础对流速影响最大,其次为单桩基础,高桩承台基础影响最小;流速垂向变化由表至底呈增大趋势,水深越大,流速越大。In order to study the effect of different structural forms of marine pile foundations on flow, a three-dimensional numerical model for open channel flow influenced by pile foundations with different structural forms was built, considering the foundation as an impermeable area. The method of gradually refined triangular meshes was used to simulate the shape of pile foundations with high precision. Based on this model, the water level and velocity of water flow influenced by different structural forms of pile foundations were calculated. The results show that the water level increased upstream and dropped downstream. The flow velocity increased on both sides of the pile foundation and decreased both upstream and downstream. Different structural forms of the pile foundations caused different variations of flow velocity ： the three-jacket foundation had the greatest impact, followed by the single-pile foundation, and the high-pile foundation had the least impact. The vertical distribution of the flow velocity showed an increasing trend from the surface to the bottom, and the flow velocity was higher at the lower level.

关 键 词：桩基 直接模拟法 垂向流速 风电场 

分 类 号：P75[天文地球—海洋科学]