潮汐钻孔诱发河床的动态响应分析和液化潜力评估

IF 2.7 3区 地球科学 Q1 ENGINEERING, MARINE
Dongzi Pan, Ying Li
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引用次数: 0

摘要

潮汐淤积是指河口潮水突然向上游涌入,对河床产生巨大的水动力,导致复杂的沉积反应。本研究探讨了大潮汐河口潮汐渠对河床的动态响应和液化潜力。利用广义毕奥理论和积分变换方法建立的分析模型对河床沉积物的动态行为进行了评估。分析了渗透性、饱和度和沉积物特性等关键因素对瞬间液化的影响。研究结果表明,细砂可通过促进孔隙水排放来降低液化风险,而粉砂土则会增加沉积物的不稳定性。此外,研究还揭示了潮汐钻孔引起的压力梯度可引发瞬时液化,根据水平压力梯度预测的最大液化深度是根据垂直压力梯度预测的五倍。这项研究强调了沉积物特征在河床稳定性中的关键作用,为潮汐渠与河床动力学之间的相互作用提供了全面的认识。研究结果有助于开发预测模型和制定指导方针,以管理沿海和河口环境中由潮汐孔引起的液化风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic Response Analysis and Liquefaction Potential Evaluation of Riverbed Induced by Tidal Bore
Tidal bores, defined by sudden upstream surges of tidal water in estuaries, exert significant hydrodynamic forces on riverbeds, leading to complex sedimentary responses. This study examines the dynamic response and liquefaction potential of riverbeds subjected to tidal bores in macro-tidal estuaries. An analytical model, developed using the generalized Biot theory and integral transform methods, evaluates the dynamic behavior of riverbed sediments. Key factors such as permeability, saturation, and sediment properties are analyzed for their influence on momentary liquefaction. The results indicate that fine sand reduces liquefaction risk by facilitating pore water discharge, while silt soil increases sediment instability. Additionally, the study reveals that pressure gradients induced by tidal bores can trigger momentary liquefaction, with the maximum liquefaction depth predicted based on horizontal pressure gradients being five times that predicted based on vertical pressure gradients. This research highlights the critical role of sediment characteristics in riverbed stability, providing a comprehensive understanding of the interactions between tidal bores and riverbed dynamics. The findings contribute to the development of predictive models and guidelines for managing the risks of tidal bore-induced liquefaction in coastal and estuarine environments.
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来源期刊
Journal of Marine Science and Engineering
Journal of Marine Science and Engineering Engineering-Ocean Engineering
CiteScore
4.40
自引率
20.70%
发文量
1640
审稿时长
18.09 days
期刊介绍: Journal of Marine Science and Engineering (JMSE; ISSN 2077-1312) is an international, peer-reviewed open access journal which provides an advanced forum for studies related to marine science and engineering. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.
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