| 摘要: |
| 桩基码头是港口工程中最常用的码头结构形式之一，应用极其广泛。高桩码头桩群基础改变了周围水动力场，进而改变泥沙冲淤演变规律，对码头结构稳定性产生影响，研究圆柱桩群阻力特性，对水流和底床冲淤变化影响具有重要意义。本文基于FVCOM的三维水动力模型，将桩柱绕流阻力等效为水流阻力，提出了一种桩群阻水效果的概化方法，通过增加桩群阻力项来研究桩群对水动力环境参数的影响，构建了群桩下方和后方水动力规律的三维水动力改进模型。该模型应用于大榭国际招商高桩码头附近流场的模拟计算，结果与实测值吻合良好，证明了模型的有效性，同时由于桩群影响，码头后方的流速减小，比码头前方减小了约67%。本文构建的模型可进一步研究高桩码头下方和后方冲淤演变规律，为码头建设和运维提供技术支撑。 |
| 关键词: 水流阻力 桩群概化 FVCOM三维模型 水动力 高桩码头 |
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| 基金项目:国家重点基础研究发展计划（973计划） |
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| Numerical simulation study on flow resistance environmental parameters of high-piled wharf |
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Xue Yurao1, Zhang Jinfeng1,2, Zhang Qinghe1, You Zaijin3, Ji Zezhou4
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1.State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University;2.Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration, Tianjin University;3.College of Transportation Engineering, Dalian Maritime University, Dalian 116026;4.CCCC First Harbor Consultants Limited Company
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| Abstract: |
| High-piled wharf is one of the most common structures in wharf engineering. The existence of pile-group foundations has introduced complexity to the currents around structures, altering the laws governing sediment erosion and deposition. This affects the stability of wharf structures. Studying the resistance characteristics of a cylindrical pile group is crucial for understanding its impact on changes in water flow, bottom bed erosion, and deposition. Based on the three-dimensional tidal current and sediment model FVCOM, the resistance of a pile group is considered equivalent to drag on the flow. A three-dimensional water-sediment model is established by simplifying the pile group force in a reasonable manner. The FVCOM module is utilized to simulate the flow field around a pile-supported pier at Daxie China Merchants International Container Terminal. The results show good agreement with the measured values, confirming the accuracy of the model. Additionally, the flow velocity at the rear of the wharf is significantly reduced by the influence of the pile group, nearly 67% lower than that at the front of the wharf. The model constructed in this paper can further investigate the evolution of erosion and deposition under and behind the high-piled wharf, and provide technical support for the construction and operation of the wharf. |
| Key words: flow resistance pile-group simplification 3D flow model of FVCOM hydrodynamic high-piled wharf |
