Dynamic Response Analysis and Liquefaction Potential Evaluation of Riverbed Induced by Tidal Bore

被引:2
作者
Pan, Dongzi [1 ]
Li, Ying [2 ]
机构
[1] Zhejiang Inst Hydraul & Estuary, Zhejiang Key Lab Estuary & Coast, Hangzhou 310020, Peoples R China
[2] Zhejiang Univ Water Resources & Elect Power, Coll Geomat, Hangzhou 310018, Peoples R China
基金
中国国家自然科学基金;
关键词
tidal bore; riverbed; liquefaction; integral transform method; analytical solution; FINES CONTENT; WAVE; PROPAGATION; DEFORMATION; SAND;
D O I
10.3390/jmse12091668
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
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.
引用
收藏
页数:24
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