Centrifugal model tests on deformation characteristics of a bank collapse section in middle reaches of Yangtze River

CHEN Hang; CHENG Yonghui; HU Shenggang; LI Bo

doi:10.11779/CJGE2024S10007

Volume 46 Issue S1

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Chinese Journal of Geotechnical Engineering > 2024 > 46(S1): 127-131. > DOI: 10.11779/CJGE2024S10007

CHEN Hang, CHENG Yonghui, HU Shenggang, LI Bo. Centrifugal model tests on deformation characteristics of a bank collapse section in middle reaches of Yangtze River[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S1): 127-131. DOI: 10.11779/CJGE2024S10007

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Centrifugal model tests on deformation characteristics of a bank collapse section in middle reaches of Yangtze River

Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China

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Received Date: April 30, 2024

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Abstract

Abstract

During the flood season and the recession period, the bank collapses in the middle and lower reaches of the Yangtze River occur frequently. They have a great impact on the coastal embankments, water transport channels, river-crossing bridges and other buildings. However, due to the fact that the bank collapse is a dynamic and sudden process with many influencing factors and complicated mechanism, and the mechanism and deformation characteristics of the bank collapse have not been fully revealed at present. Based on the bank collapse section of Nanwuzhou Changjiang Village in the middle reaches of the Yangtze River as a representative, the stratum characteristics are obtained through field prospecting. The physical and mechanical characteristics of soil mass are analyzed through the indoor physical and mechanical tests. The centrifugal model tests are carried out to reveal the process of bank slope collapse caused by the scouring of the non-cohesive soil layer at the foot of the slope. While the section shape is simplified based on the measured topography of the bank collapse section. Meanwhile, the DDA numerical analysis results are used to compared with the test ones, which shows that the bank slope soil collapse exhibits a sudden collapse characteristics with 'dislocation + rotation' deformation.
- bank collapse,
- soil property,
- centrifugal model test,
- deformation characteristic

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[1]	余文畴, 卢金友. 长江河道崩岸与护岸[M]. 北京: 中国水利水电出版社, 2008. YU Wenchou, LU Jinyou. Collapse and Revetment of the Yangtze River Channel[M]. Beijing: China Water & Power Press, 2008. (in Chinese)
[2]	张幸农, 蒋传丰, 陈长英, 等. 江河崩岸的类型与特征[J]. 水利水电科技进展, 2008, 28(5): 66-70. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSD200805020.htm ZHANG Xinnong, JIANG Chuanfeng, CHEN Changying, et al. Types and features of riverbank collapse[J]. Advance in Science and Technology of Water Resource, 2008, 28(5): 66-70. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSD200805020.htm
[3]	OSMAN A M, THORNE C R. Riverbank stability analysis: I Theory[J]. Journal of Hydraulic Engineering, 1988, 114(2): 134-150. doi: 10.1061/(ASCE)0733-9429(1988)114:2(134)
[4]	ASCE Task Committee. Hydraulics, Bank Mechanics, and Modeling of River Width Adjustment: I Processes and mechanisms[J]. ASCE Journal of Hydraulic Engineering, 1998, 124(9): 881- 902. doi: 10.1061/(ASCE)0733-9429(1998)124:9(881)
[5]	蒋泽锋, 朱大勇, 沈银斌, 等. 水流冲刷过程中的边坡临界滑动场及河岸崩塌问题研究[J]. 岩土力学, 2015, 36(增刊2): 21-28. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2015S2003.htm JIANG Zefeng, ZHU Dayong, SHEN Yinbin, et al. Numerical simulation method of bank collapse based on theory of critical slip field[J]. Rock and Soil Mechanics, 2015, 36(S2): 21-28. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2015S2003.htm
[6]	余文畴, 岳红艳. 长江中下游崩岸机理中的水流泥沙运动条件[J]. 人民长江, 2008(3): 64-66, 95. https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE200803026.htm YU Wenchou, YUE Hongyan. The flow and sediment movement conditions in the mechanism of bank collapse in the middle-lower Yangtze River[J]. Yangtze River, 2008(3): 64-66, 95. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE200803026.htm
[7]	SUTARTO T, PAPANICOLAOU A N, WILSON C G, et al. Stability analysis of semicohesive streambanks with CONCEPTS: Coupling field and laboratory investigations to quantify the onset of fluvial erosion and mass failure[J]. Journal of Hydraulic Engineering, 2014, 140(9): 04014041 doi: 10.1061/(ASCE)HY.1943-7900.0000899
[8]	KLAVON K, FOX GA, GUERTAULT L, et al. Evaluating a process‐based model for use in streambank stabilization: insights on the Bank Stability and Toe Erosion Model (BSTEM)[J]. Earth Surface Processes and Landforms, 2017, 42(1): 191-213.
[9]	夏军强, 宗全利. 荆江段崩岸机理及数值模拟[M]. 北京: 科学出版社, 2015. XIA Junqiang, ZONG Quanli. Mechanism and Numerical Simulation of Bank Collapse in Jingjiang[M]. Beijing: Science Press, 2015. (in Chinese)
[10]	XU Dongdong, LU Bo, CHEN Yonghui, et al. A continuous-discontinuous deformations analysis method for simulating the progressive failure process of riverbanks[J]. Engineering Analysis with Boundary Elements, 2022, 143: 137-151.
[11]	陈航, 徐栋栋, 李波. 长江中游荆江河段崩岸巡查、监测及预警技术研究项目岸坡崩岸力学机制与变形规律分析报告[R]. 武汉: 长江水利委员会长江科学院, 2021. CHEN Hang, XU Dongdong, LI Bo. Research Report on the Mechanical Mechanism and Deformation Law of Bank Slope Collapse of the Jingjiang Section in the Middle Reaches of Yangtze River through Inspection, Monitoring, and Early Warning Technology Research Project[R]. Wuhan: Changjiang River Scientific Research Institute, 2021. (in Chinese)