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Effect of complicated river boundaries on the cycle of landslide surge
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摘要: 滑坡涌浪对涌浪生成和传播区域可能造成巨大影响。河道型水库滑坡涌浪受河道边界的作用会产生波浪叠加。为研究河道边界对滑坡涌浪周期的影响规律，借助长江三峡库区万州某河段与原型一致的物理模型，基于FLOW-3D计算流体力学软件建立三维滑坡涌浪数值模型，给出了数值求解、网格划分和边界条件设置方法，并经物理模型试验对建立的三维数学模型进行一致性较好的验证。按照滑坡体入水点位于河道直线段、弯道凸岸顶点、弯道凹岸顶点3种工况，模拟分析复杂河道边界对滑坡涌浪周期的影响规律，绘制波谱强度与频率关系图，得出不同岸坡坡度、弯道凹岸平面曲率、凹岸圆弧角度、凸岸圆弧角度对涌浪周期的影响规律。Abstract: Landslide surge can cause huge damage to the area of surge generation and propagation. The effect of the river boundary on the landslide surge in a river-type reservoir will result in wave superposition. In order to study the effect of river boundary on the surge period of landslide, a 3-d numerical model of landslide surge is established based on the FLOW-3D computational fluid dynamics software, using a physical model which is identical to the prototype of a river section in Wanzhou in Three Gorges Reservoir area. The methods of numerical solution, mesh generation and boundary condition setting are given, and the consistency of the three-dimensional mathematical model is verified by physical model test results. According to the three working conditions that the water entry point of the landslide body is located in the straight section of the river channel, at the crest of the convex bank and at the crest of the concave bank of the curved channel, the relation graphs of spectrum intensity and frequency are drawn. The influence law of the complicated river boundary on the surge period of the landslide is analyzed, and the effects of different bank slopes, curvature of curved concave bank, arc angle of concave bank and arc angle of convex bank on swell period are obtained.
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Key words:
- landslide surge /
- complicated river boundary /
- back wave cycle /
- numerical model /
- FLOW-3D
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图 1 滑坡涌浪数值模拟三维模型及网格划分
Figure 1. 3D model and mesh of landslide surge numerical simulation
图 2 凸岸滑坡涌浪测点平面布置（单位：m）
Figure 2. Layout plan of swell measuring points of convex landslide (unit: m)
图 4 不同岸坡坡度作用下A1及A2测点频谱
Figure 4. Spectra of point A1 and point A2 under the action of different bank slope angles
图 5 不同凹岸平面曲率作用下B1及B2测点频谱
Figure 5. Spectra of point B1 and point B2 under the action of plane curvature of different concave banks
图 6 不同凹岸圆弧角度作用下B1及B2测点频谱
Figure 6. Spectra of point B1 and point B2 under action of different concave bank arc angles
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[1] 黄锦林. 库岸滑坡涌浪对坝体影响研究[D]. 天津: 天津大学, 2012. HUANG Jinlin. Study on the surge of reservoir bank landslide and it’s effect on dam body[D]. Tianjin: Tianjin University, 2012.(in Chinese ) [2] 王平义, 韩林峰, 喻涛, 等. 滑坡涌浪对高桩码头船舶撞击力的影响[J]. 哈尔滨工程大学学报,2016,37(6):878-884. (WANG Pingyi, HAN Linfeng, YU Tao, et al. Effectsof landslide generated impulse waves on ship impact force for pile wharf[J]. Journal of Harbin Engineering University, 2016, 37(6): 878-884. (in Chinese) [3] CROSTA G B, IMPOSIMATO S, RODDEMAN D. Landslide spreading, impulse water waves and modelling of the vajontrockslide[J]. Rock Mechanics and Rock Engineering, 2016, 49(6): 2413-2436. doi: 10.1007/s00603-015-0769-z [4] LORENZAP, GARDONI M. Landslide generated waves in dam reservoirs-experimental investigation on a physical hydraulic model[D]. Trondheim: Norwegian University of Science and Technology, 2017. [5] LAW L, BREBNER A. On water waves generated by landslides[C]//Proceedings of the 3rd Australasian Conference on Hydraulics and FluidMechanics. Sydney: The Institution of Engineers, 1968: 155-159. [6] DI RISIO M, DE GIROLAMO P, BELLOTTI G, et al. Landslide-generated tsunamis runup at the coast of a conical island: new physical model experiments[J]. Journal of Geophysical Research: Oceans, 2009, 114: C01009. [7] DI RISIO M, BELLOTTI G, PANIZZO A, et al. Three-dimensional experiments on landslide generated waves at a sloping coast[J]. Coastal Engineering, 2009, 56(5/6): 659-671. [8] 王育林, 陈凤云, 齐华林, 等. 危岩体崩滑对航道影响及滑坡涌浪特性研究[J]. 中国地质灾害与防治学报,1994,5(3):95-100. (WANG Yulin, CHEN Fengyun, QI Hualin, et al. The effect of rockfall and landslide on channel and the study on the characteristics of surge generated by landslide[J]. The Chinese Journal of Geological Hazard and Control, 1994, 5(3): 95-100. (in Chinese) [9] 胡小卫. 山区河道型水库滑坡涌浪特性研究[D]. 重庆: 重庆交通大学, 2011. HU Xiaowei. Study on the characteristics of the surge happening in mountain river-type reservoir[D]. Chongqing: Chongqing Jiaotong University, 2011. (in Chinese) [10] 杨飞鹏. 不同断面库区滑坡涌浪的产生及传播规律的数值模拟研究[D]. 西安: 西安理工大学, 2016. YANG Feipeng. Numerical simulation study on the formation and the propagation characteristics of landslide-generated waves in the different reservoir section[D]. Xi’an: Xi’an University of Technology, 2016. (in Chinese ) [11] 谢海清, 蒋昌波, 邓斌, 等. 狭窄型库区河道滑坡涌浪的形成及其传播规律[J]. 交通科学与工程,2017,33(4):45-50, 76. (XIE Haiqing, JIANG Changbo, DENG Bin, et al. Formation and propagation regulation of water waves caused by the landslides in narrow reservoir’s river channel[J]. Journal of Transport Science and Engineering, 2017, 33(4): 45-50, 76. (in Chinese) doi: 10.3969/j.issn.1674-599X.2017.04.009 [12] 黄筱云, 刘灿, 程永舟, 等. V型河道下滑坡涌浪的传播与爬高[J]. 长沙理工大学学报(自然科学版),2017,14(1):70-77. (HUANG Xiaoyun, LIU Can, CHENG Yongzhou, et al. Propagation and climb height of surge triggered by landslide in V-river[J]. Journal of Changsha University of Science and Technology (Natural Science), 2017, 14(1): 70-77. (in Chinese) [13] 阎超. 计算流体力学方法及应用[M]. 北京: 北京航空航天大学出版社, 2006: 20-22. YAN Chao. Computational fluid dynamics methods and applications[M]. Beijing: Beihang University Press, 2006: 20-22. (in Chinese) [14] 王平义, 王多银, 喻涛, 等. 山区河道型水库滑坡涌浪特性及其对通航影响与预防技术[M]. 北京: 人民交通出版社, 2018: 28-29. WANG Pingyi, WANG Duoyin, YU Tao, et al. Characteristics of landslide surge of river-channel reservoir in mountainous area and its influence on navigation and prevention technology[M]. Beijing: China Communications Press, 2018: 28-29. (in Chinese ) [15] WANG Y L. Experimental and numerical study of hydrodynamic oscillations in partially saturated porous Media[D]. Toulouse: Institut National Polytechnique de Toulouse, 2010. -
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