| 船闸泄水作用下引航道中动水冲沙规律 |
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| 引用本文： | 徐进超,李云,宣国祥,刘本芹,金英. 船闸泄水作用下引航道中动水冲沙规律[J]. 水科学进展, 2016, 27(2): 186-195. DOI: 10.14042/j.cnki.32.1309.2016.02.003 |
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| 作者姓名： | 徐进超 李云 宣国祥 刘本芹 金英 |
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| 作者单位： | 1.南京水利科学研究院, 江苏南京 210029; |
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| 基金项目： | 三峡后续工作航运项目(0001232013CF2000001);国家自然科学基金资助项目(51409141) |
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| 摘 要： | 结合工程实际,研究利用船闸泄水进行下游引航道清淤,对减少清淤成本、提高通航效率有着重要的工程价值。建立枢纽及船闸下游引航道的二维水沙数学模型,采用已有模型试验对水流场和泥沙场进行验证。研究引航道及口门区的泥沙淤积规律,在此基础上,分析船闸输水系统的水力特性,研究了不同冲刷流量、冲刷时间和初始淤积厚度下引航道及口门区的冲刷效果,得出船闸泄水量与引航道及口门区最大淤积厚度的关系。结果表明,在同一初始淤积地形和冲刷流量下,引航道及口门区的最大淤积厚度与冲刷时间呈线性变化,冲刷流量越大,泥沙厚度下降的斜率越大。淤积厚度低于一定值后,随冲刷时间的增加,冲刷效果开始减弱。
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| 关 键 词： | 引航道 淤积 冲刷 水沙模型 |
| 收稿时间： | 2015-08-04 |
Study on the sediment scouring rules by dynamic water effect in approach channel under the action of ship lock sluicing |
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| XU Jinchao,LI Yun,XUAN Guoxiang,LIU Benqin,JIN Ying. Study on the sediment scouring rules by dynamic water effect in approach channel under the action of ship lock sluicing[J]. Advances in Water Science, 2016, 27(2): 186-195. DOI: 10.14042/j.cnki.32.1309.2016.02.003 |
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| Authors: | XU Jinchao LI Yun XUAN Guoxiang LIU Benqin JIN Ying |
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| Affiliation: | 1.Nanjing Hydraulic Research Institute, Nanjing 210029, China;2.Key Laboratory of Navigation Structure Construction Technology, Ministry of Transport, Nanjing 210000, China |
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| Abstract: | In order to reduce the cost of desilting, and improve the efficiency of navigation, the desilting in the downstream approach channel by ship lock sluicing is studied with engineering practice. A two-dimensional numerical water-sediment model has been established for simulated analysis, and the hydraulic test of flow field and sediment field has been employed for verification. It explores the rules of sediment deposition in the entrance of approaching channel, analyzes the hydraulic characteristics of water conveyance system in ship lock, studies the scouring effect in the different scouring discharge, scouring time and initial siltation thickness, and obtains the relationship between water discharge of ship lock and the maximum siltation thickness. The results show that the maximum siltation thickness is decreasing with the increasing scouring time linearly under the same initial terrain and discharge, and the slop of sediment thickness is increasing with the scouring discharge. When the thickness decreases to a critical value, the scouring effect becomes weakened with the increasing scouring speed. Research results may provide theoretical reference for the desalting technology of the channel by the use of lock emptying. |
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| Keywords: | approach channel sedimentation scouring water-sediment model |
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