| 俞梅欣，王彤，李小军，喻国良，张民曦.海床基三脚架基础局部冲刷与防护技术研究[J].海洋工程,2026,(1):82~93 |
| 海床基三脚架基础局部冲刷与防护技术研究 |
| Research on local scour and protection techniques for the foundation of tripod seabed platforms |
| 投稿时间：2024-12-20 修订日期：2025-03-05 |
| DOI：10.16483/j.issn.1005-9865.2026.01.008 |
| 中文关键词: 多桩组 复合桩基 局部冲刷 主动防护 插板 底坎 |
| 英文关键词:multi-pile composite pile foundation local scour active scour protection insert-type sill bottom sill |
| 基金项目:国家自然科学基金项目（52171268） |
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| 摘要点击次数: 22 |
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| 中文摘要: |
| 基础冲刷是海工结构安全的主要威胁之一，如何降低冲刷深度是当下亟待解决的关键问题。针对某工程中的海床基三脚架基础，采用FLOW-3D软件建立了三维水动力和冲刷仿真数值模型，并根据前人试验验证了数值模型的准确性，研究了水流作用下海床基周围的水动力特征和局部冲刷特性；基于海床基周围的近床面水动力特性，提出了一种插板式底坎冲刷主动防护措施，并通过数值模拟对采用插板式底坎防护后的海床基局部流场和冲刷特性进行了分析。结果表明，插板式底坎有效减小了海床基周围的近床面流速，可将桩周最大冲刷深度削减70%，防护效果较好，可为实际工程中同类基础结构的冲刷防护提供参考。 |
| 英文摘要: |
| Scour around foundations is one of the main threats to the safety of marine structures, and reducing scour depth is a critical issue that must be addressed urgently. In this paper, focusing on a tripod foundation on the seabed of a specific project, a three-dimensional hydrodynamic and scour simulation model was established using FLOW-3D software, and its accuracy was verified against previous experiments. The hydrodynamic characteristics and local scour patterns around the seabed foundation under water flow were investigated. Based on the near-bed hydrodynamic characteristics, an active scour protection measure with an insert-type bottom sill was proposed, and the local flow field and scour behavior after applying this protection were analyzed through numerical simulation. The results show that the insert-type bottom sill effectively reduces near-bed flow velocity around the seabed foundation and can decrease the maximum scour depth around the pile by up to 70%, demonstrating good protective performance. These findings can provide useful guidance for scour protection of similar foundation structures in practical engineering. |
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