| 霍尔锚在粉细砂中抛锚深度模型试验 |
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| 引用本文： | 王慧,张可成,王忠涛,张宇,王洪波.霍尔锚在粉细砂中抛锚深度模型试验[J].海洋学报,2020,42(11):123-130. |
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| 作者姓名： | 王慧 张可成 王忠涛 张宇 王洪波 |
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| 作者单位： | 1.大连理工大学 海岸和近海工程国家重点实验室，辽宁 大连 116023 |
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| 基金项目： | 国家重点研发计划;国家自然科学基金 |
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| 摘 要： | 航船应急抛锚时锚板贯入土体可能会影响河床或海床中的结构物甚者造成破坏，因此在通航频繁的航道，结构物埋深的设计需要充分考虑应急抛锚时锚板的贯入深度。本文通过缩尺模型试验模拟了霍尔锚在中等密实度粉细砂中的抛锚贯入过程，研究了不同抛锚速度(1.15～4.4 m/s)及粉细砂相对密实度(0.45～0.65)对抛锚贯入深度的影响；基于太沙基极限承载力理论和能量守恒定律，推导出霍尔锚在粉细砂土中贯入深度的表达式，与模型试验结果对比显示理论计算结果偏于保守。基于试验结果提出修正系数，修正后的理论公式能够较好地快速预测霍尔锚在中等密实度粉细砂中的贯入深度。研究结果为粉细砂土河床或海床中的结构物埋深设计提供了一定的技术参考。
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| 关 键 词： | 霍尔锚 粉细砂土 抛锚深度 抛锚速度 |
| 收稿时间： | 2019-08-01 |
Model tests on penetration depth of hall anchor in silty sand |
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| Institution: | 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China2.Shanghai Ship & Shipping Research Institute, Shanghai 200135, China3.China Resources Land Co., Ltd., Dalian 116019, China |
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| Abstract: | The structures in the riverbed or seabed may be affected or damaged by emergency anchoring. In the channel with frequent navigation, the emergency anchoring penetration depth need to be fully considered during the design of the buried depth of structures in riverbed. In this paper, small scale model tests are carried out to simulate the process of anchoring penetration of hall anchor in silty sand, and the influences of different impact velocities (1.15?4.4 m/s) and relative density of silty sand (0.45?0.65) on anchoring penetration depth are investigated. Based on the Terzaghi ultimate bearing capacity theory and the energy conservation law, the expression of penetration depth of the hall anchor in silty sand is deduced, and the theoretical calculation results are conservative compared with experimental results, the revised results of the theoretical calculation results are in good agreement with experimental data. The research results can provide a reference for the design of buried depth of structures in silty sand riverbed or seabed. |
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