| China Geological Environment Monitoring Institute, China Geological Disaster Prevention Engineering Industry Association | Host |
| Citation: |
XIA Wanyun. Analysis on characteristic of slope erosion in Dongzhiyuan plateau of Yinchuan−Xi'an high-speed railway[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(1): 99-106. doi: 10.16031/j.cnki.issn.1003-8035.2022.01-12
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Analysis on characteristic of slope erosion in Dongzhiyuan plateau of Yinchuan−Xi'an high-speed railway
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Abstract
The study of erosion characteristics of loess slope is of great significance , through the scour experiment on a slope in Dongzhiyuan of Yinxi high-speed railway, the erosion state of slope under different scour duration, scour flow and gradient were obtained. The dynamic characteristics of overland flow and the sediment mechanism were further analyzed and fitted, and the following conclusions were drawn: (1) The top and bottom of the slope are more easily eroded than the middle of the slope;The slopes of 30°−60° can produce obvious erosion gullies even with small scouring intensity, and it is advisable to adopt a short the multi-stage short slopes of about 45° to reduce weaken the erosion intensity. (2) The analysis of the hydrodynamic behavior of the overland flow shows that the flow is mainly in the transitional flow zone . The average flow under the test condition velocity, is a power function with the scour flow and gradient; the Darcy resistance coefficient is negatively correlated with scour flow and gradient, and correlation with values of Re is low. (3) The average sediment concentration is positively correlated with the scour flow and gradient, and increases linearly with the scour duration. After about 20min, the sediment concentration is basically stable, and this process is the stage of development of slope channel. (4) The sediment yield is positively correlated with erosion shear stress and effective water flow power. and it approximately linearly increases with the former while it is power function with latter.
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References
[1] BAGNOLD R A. An approach to the sediment transport problem from general physics[J]. USGS Professional Paper,1966:422 − 437. [2] FOSTER G R. Modeling the erosion process [M]. St Joseph: ASAE Monogr, 1982: 296 − 380. [3] NEARING M A, FOSTER G R, LANE L J, et al. A process-based soil erosion model for USDA-water erosion prediction project technology[J]. Transactions of the ASAE,1989,32(5):1587 − 1593. doi: 10.13031/2013.31195 [4] GOVERS G. Relationship between discharge, velocity and flow area for rills eroding loose, non-layered materials[J]. Earth Surface Processes and Landforms,1992,17(5):515 − 528. doi: 10.1002/esp.3290170510 [5] ZHANG B J, XIONG D H, SU Z G, et al. Effects of initial step height on the headcut erosion of bank gullies: a case study using a 3D photo-reconstruction method in the dry-hot valley region of southwest China[J]. Physical Geography,2016,37(6):409 − 429. doi: 10.1080/02723646.2016.1219939 [6] ZHANG B J, XIONG D H, ZHANG G H, et al. Impacts of headcut height on flow energy, sediment yield and surface landform during bank gully erosion processes in the Yuanmou Dry-hot Valley region, southwest China[J]. Earth Surface Processes and Landforms,2018,43(10):2271 − 2282. doi: 10.1002/esp.4388 [7] GUO M M, WANG W L, SHI Q H, et al. An experimental study on the effects of grass root density on gully headcut erosion in the gully region of China's Loess Plateau[J]. Land Degradation & Development,2019,30(17):2107 − 2125. [8] 陈绍宇, 许建民, 王文龙, 等. 黄土高塬沟壑区董志塬沟头溯源侵蚀特征及其防治途径[J]. 水土保持通报,2009,29(4):37 − 41. [CHEN Shaoyu, XU Jianmin, WANG Wenlong, et al. Erosion features of head-cut and its control measures on Dongzhiyuan of the loess plateau[J]. Bulletin of Soil and Water Conservation,2009,29(4):37 − 41. (in Chinese with English abstract) [9] 陈绍宇, 许建民, 王文龙. 高塬沟壑区董志塬沟头溯源侵蚀典型调查研究[J]. 中国农学通报,2009,25(9):258 − 263. [CHEN Shaoyu, XU Jianmin, WANG Wenlong. The research on erosional types and process of head-cut on Dongzhiyuan of loess plateau[J]. Chinese Agricultural Science Bulletin,2009,25(9):258 − 263. (in Chinese with English abstract) [10] 史倩华, 王文龙, 郭明明, 等. 董志塬沟头溯源侵蚀过程及崩塌中孔隙水压力变化[J]. 农业工程学报,2019,35(18):110 − 117. [SHI Qianhua, WANG Wenlong, GUO Mingming, et al. Headcut erosion processes and pore water pressure variation on Dongzhi tableland of China[J]. Transactions of the Chinese Society of Agricultural Engineering,2019,35(18):110 − 117. (in Chinese with English abstract) doi: 10.11975/j.issn.1002-6819.2019.18.014 [11] 张科利. 黄土坡面发育的细沟水动力学特征的研究[J]. 泥沙研究,1999(1):56 − 61. [ZHANG Keli. Hydrodynamic characteristics of rill flow on loess slopes[J]. Journal of Sediment Research,1999(1):56 − 61. (in Chinese with English abstract) doi: 10.3321/j.issn:0468-155X.1999.01.010 [12] 沙际德, 白清俊. 粘性土坡面细沟流的水力特性试验研究[J]. 泥沙研究,2001(6):39 − 44. [SHA Jide, BAI Qingjun. Experimental study on hydraulic characteristics of rill flows over clay soil slope[J]. Journal of Sediment Research,2001(6):39 − 44. (in Chinese with English abstract) doi: 10.3321/j.issn:0468-155X.2001.06.007 [13] 张光辉. 坡面薄层流水动力学特性的实验研究[J]. 水科学进展,2002,13(2):159 − 165. [ZHANG Guanghui. Study on hydraulic properties of shallow flow[J]. Advances in Water Science,2002,13(2):159 − 165. (in Chinese with English abstract) doi: 10.3321/j.issn:1001-6791.2002.02.005 [14] 覃超, 何超, 郑粉莉, 等. 黄土坡面细沟沟头溯源侵蚀的量化研究[J]. 农业工程学报,2018,34(6):160 − 167. [QIN Chao, HE Chao, ZHENG Fenli, et al. Quantitative research of rill head advancing process on loessial hillslope[J]. Transactions of the Chinese Society of Agricultural Engineering,2018,34(6):160 − 167. (in Chinese with English abstract) doi: 10.11975/j.issn.1002-6819.2018.06.020 [15] 陈国祥, 姚文艺. 坡面流水力学[J]. 河海科技进展,1992,12(2):7 − 13. [CHEN Guoxiang, YAO Wenyi. Slope flow mechanics[J]. Advances in Science and Technology of Hohai University,1992,12(2):7 − 13. (in Chinese with English abstract) [16] 刘青泉, 李家春, 陈力, 等. 坡面流及土壤侵蚀动力学(Ⅰ): 坡面流[J]. 力学进展,2004,34(3):360 − 372. [LIU Qingquan, LI Jiachun, CHEN Li, et al. Dynamics of overland flow and soil erosion (Ⅰ): Overland flow[J]. Advances in Mechanics,2004,34(3):360 − 372. (in Chinese with English abstract) [17] 张宽地, 王光谦, 吕宏兴, 等. 模拟降雨条件下坡面流水动力学特性研究[J]. 水科学进展,2012,23(2):229 − 235. [ZHANG Kuandi, WANG Guangqian, LYU Hongxing, et al. Experimental study of shallow flow hydraulics on a hillslope under artificial rainfall conditions[J]. Advances in Water Science,2012,23(2):229 − 235. (in Chinese with English abstract) [18] 闫玉平, 肖世国. 考虑滑带强度参数分区取值的堆积层滑坡稳定性分析方法[J]. 中国地质灾害与防治学报,2020,31(2):44 − 49. [YAN Yuping, XIAO Shiguo. Stability analysis method for bedrock-talus landslides considering strength parameter partition of slip shear band[J]. The Chinese Journal of Geological Hazard and Control,2020,31(2):44 − 49. (in Chinese with English abstract) [19] 闫玉平, 肖世国. 双排抗滑桩加固滑坡的前桩后侧推力算法[J]. 水文地质工程地质,2021,48(4):55 − 63. [YAN Yuping, XIAO Shiguo. Calculation method for thrust on the fore piles of double-row stabilizing piles used to reinforce landslides[J]. Hydrogeology & Engineering Geology,2021,48(4):55 − 63. (in Chinese with English abstract) [20] 张哲. 董志塬黄土冲沟溯源侵蚀对银西高铁的影响[J]. 铁道建筑,2015,55(11):76 − 79. [ZHANG Zhe. Influence of gully erosion on Yinxi high-speed railway in Dongzhi plateau[J]. Railway Engineering,2015,55(11):76 − 79. (in Chinese with English abstract) [21] 孟祥连, 夏万云, 周福军, 等. 银西高铁董志塬地区黄土工程特性分析研究[J]. 铁道工程学报,2016,33(12):24 − 28. [MENG Xianglian, XIA Wanyun, ZHOU Fujun, et al. Analysis and study of loess engineering characteristics of Dongzhiyuan on Xi'an-Yinchuan high-speed railway[J]. Journal of Railway Engineering Society,2016,33(12):24 − 28. (in Chinese with English abstract) [22] FLANAGAN D C, NEARING M A. Sediment particle sorting on hillslope profiles in the wepp model[J]. Transactions of the Asae,2000,43(3):573 − 583. doi: 10.13031/2013.2737 [23] 李鹏, 李占斌, 郑良勇, 等. 黄土坡面径流侵蚀产沙动力过程模拟与研究[J]. 水科学进展,2006,17(4):444 − 449. [LI Peng, LI Zhanbin, ZHENG Liangyong, et al. Hydrodynamics process of soil erosion and sediment yield by runoff on loess slope[J]. Advances in Water Science,2006,17(4):444 − 449. (in Chinese with English abstract) -
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XIA Wanyun. Analysis on characteristic of slope erosion in Dongzhiyuan plateau of Yinchuan−Xi'an high-speed railway[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(1): 99-106. doi: 10.16031/j.cnki.issn.1003-8035.2022.01-12
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Figure 1.
Site of the scour experiment of loess slope
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Figure 2.
Diagram of the scour experiment
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Figure 3.
Slope scouring results in different time periods
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Figure 4.
Slope scouring results under different feed flow
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Figure 5.
Slope scouring results at different gradient
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Figure 6.
Relationship between average flow velocity and feed flow at different gradient
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Figure 7.
Relationship between average flow velocity and gradient at different values of Re
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Figure 8.
The log-log relationship between Darcy resistance coefficient and value of Re
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Figure 9.
Relationship between sediment yield rate and feed flow at different gradient
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Figure 10.
Relationship between sediment yield rate and scour time at different gradient
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Figure 11.
Relationship between scour shear stress and sediment yield rate on slope
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Figure 12.
Relationship between effective scour power and sediment yield rate on slope