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渗流与侧向流共同作用下的潮沟边壁侵蚀研究进展
龚政1, 王客予1,2, 赵堃1, 张凯丽1
1.河海大学江苏省海岸海洋资源开发与环境安全重点实验室 江苏南京 210098;2.中国电建集团西北勘测设计研究院有限公司 陕西西安 710065
摘要:
潮沟的边壁侵蚀可以分为水流作用下的边壁冲刷与土块重力作用下的边壁崩塌。前人研究表明,水流流速、水压及土体干密度等因素均对底床冲刷率有显著影响,然而侧向边壁的冲刷率量测以及相关影响因素问题亟待解决。前人较多关注侧向流对于边壁崩塌的影响,而对渗流作用以及渗流与侧向流在边壁侵蚀过程中的共同作用研究较少。近期研究表明,渗流已成为边壁侵蚀过程中的重要一环。因此,渗流与侧向流不同动力作用下,边壁侵蚀的差异性和相似性,以及两种动力共同作用下的侵蚀机制仍待进一步探究。
关键词:  潮沟  冲刷率  边壁侵蚀  渗流
DOI:10.11693/hyhz20211100302
分类号:
基金项目:国家杰出青年科学基金项目,51925905号。
RESEARCH PROGRESS ON BANK EROSION OF TIDAL CHANNEL UNDER COUPLED EFFECT OF SEEPAGE AND SURFACE FLOW
GONG Zheng1, WANG Ke-Yu1,2, ZHAO Kun1, ZHANG Kai-Li1
1.Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, China;2.PowerChina Northwest Engineering Co. Ltd., Xi’an 710065, China
Abstract:
The bank erosion of tidal channel can be divided into bank scouring by flow and bank collapse by gravity. Previous studies have shown that flow velocity, water pressure, soil dry density, and other factors would affect the bed scouring rate. However, the measurements of scouring rate of sidewall bank and related influencing factors need remain unsolved. Previous studies paid more attention to the influence of surface flow on bank collapse, but less on seepage and the coupled effect of seepage and surface flow on bank instability. Recent studies show that seepage play an important role in the destabilization of tidal channel bank. In the future, the difference and similarity of bank erosion under different dynamic actions of seepage and surface flow, and the destabilization mechanism of tidal channel bank under the coupled effect of the two forces need to be explored.
Key words:  tidal channel  scour rate  bank erosion  seepage
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