黄河上游沙漠小流域粗沙岸坡重力侵蚀滑塌过程及型态的数值模拟

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (5): 127-133.

黄河上游沙漠小流域粗沙岸坡重力侵蚀滑塌过程及型态的数值模拟

王之君^*, 张科, 李余杰, 郑健

兰州理工大学能源与动力工程学院, 甘肃兰州 730050

收稿日期:2020-03-24 出版日期:2023-10-28 发布日期:2023-11-07
通讯作者: 王之君(1980-),男,甘肃武威人,副教授. Email:wzj1159@163.com
基金资助:
国家自然科学基金(42167043,51269009),中科院西部之光人才培养计划项目(29Y329971)

Numerical simulation on coarse sand bank collapse processes and shape response to gravitational erosion from a small desert watershed in the Upper Yellow River

WANG Zhi-jun, ZHANG Ke, LI Yu-jie, ZHENG Jian

School of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2020-03-24 Online:2023-10-28 Published:2023-11-07

摘要/Abstract

摘要： 采用黄河上游“十大孔兑”典型沙漠小流域 “苏达尔沟”的数字高程数据,以黄土岸坡的滑塌过程和型态作为参照组,基于强度折减理论,通过数值模拟和野外实测资料对比验证,概化模拟降雨均匀入渗条件下沙漠粗沙岸坡的滑塌过程及型态.结果表明:受土体颗粒之间黏聚力的影响,粗沙岸坡主要表现为分层、片状滑塌,而黄土岸坡多表现为块状或团状滑塌;较之黄土岸坡的弧型滑动,粗沙岸坡为折线型滑动,滑塌型态直立,模拟与实测结果定性吻合.

关键词: 黄河上游, 粗沙岸坡, 重力侵蚀, 滑塌过程及型态, 强度折减理论

Abstract: Using the digital elevation data of “Sudalaer”, a typical desert watershed from ten tributaries area in the Upper Yellow River, and taking the processes and types of loess bank as the reference group, the process and types of desert coarse sand bank collapse under steady rainfall infiltration conditions in the Upper Yellow River were studied through Strength Reduction Theory based generalized numerical simulation as well as field observation analysis. The results indicate that under the influence of cohesive force, the coarse sand bank slope is mainly in the state of layering and flaky slumping, while the loess bank slope is mostly in the state of block or mass slumping. Compared with the arc sliding of loess bank slope, the coarse sand bank slope presents a broken line sliding, and the collapse pattern is upright, which is qualitatively consistent with the measured results.

Key words: the Upper Yellow River, coarse sand bank, gravitational erosion, collapse processes and type, strength reduction theory

中图分类号:

TV142

王之君, 张科, 李余杰, 郑健. 黄河上游沙漠小流域粗沙岸坡重力侵蚀滑塌过程及型态的数值模拟[J]. 兰州理工大学学报, 2023, 49(5): 127-133.

WANG Zhi-jun, ZHANG Ke, LI Yu-jie, ZHENG Jian. Numerical simulation on coarse sand bank collapse processes and shape response to gravitational erosion from a small desert watershed in the Upper Yellow River[J]. Journal of Lanzhou University of Technology, 2023, 49(5): 127-133.

参考文献

[1] 赵超,王书芳,徐向舟,等.重力侵蚀黄土沟壑区沟坡产沙特性 [J].农业工程学报,2012,28(12):140-145.
[2] 张霞,张振文,李占斌,等.黄土高原小流域重力侵蚀稳定性评价 [J].水土保持通报,2012,32(3):236-239+301.
[3] 杨吉山,姚文艺,王玲玲.黄土沟道重力侵蚀规律及机理研究 [J].人民黄河,2014,36(6):93-96.
[4] 高哲,张富,高建恩,等.黄土丘Ⅴ区典型小流域坝控区重力侵蚀分析与预测 [J].水土保持学报,2018,32(3):107-112+125.
[5] 余璐,徐向舟,张茂省,等.黄土高原重力侵蚀对地貌因素的敏感性分析 [J].水土保持学报,2019,33(4):119-125.
[6] 王光谦,薛海,刘家宏.坡面产沙理论模型 [J].应用基础与工程科学学报,2005(S1):6-12.
[7] 王光谦,李铁键,薛海,等.流域泥沙过程机理分析 [J].应用基础与工程科学学报,2006,14(4): 455-462.
[8] 刘青泉,李家春,陈力,等.坡面流及土壤侵蚀动力学(Ⅱ)—土壤侵蚀 [J].力学进展,2004,34(4): 493-506.
[9] WANG Z,TA W.Hyper-concentrated flow response to aeolian and fluvial interactions from a desert watershed upstream of the Yellow River [J].Catena,2016,147:258-268.
[10] 王之君.黄河上游沙漠宽谷段高含沙洪水灾害机理与河型响应 [D].北京:中国科学院大学,2016.
[11] 王之君,拓万全,王昱,等.黄河上游“十大孔兑”高含沙洪水灾害过程与输沙特性 [J].灾害学,2019,34 (3):93-96.
[12] 顾姝伟.山西某黄土边坡的稳定性分析 [D].邯郸:河北工程大学,2017.
[13] 林秀芝,郭彦,侯素珍.内蒙古十大孔兑输沙量估算 [J].泥沙研究,2014(2):15-20.
[14] 褚铅波.基于FLAC~(3d)的土质边坡稳定性及其抗滑桩加固研究[D].杭州:浙江大学,2013
[15] 韩其为,何明民.细颗粒泥沙成团起动及其流速的研究 [J].湖泊科学,1997(4):307-316.
[16] 赵鹏.基于ABAQUS的滑坡稳定性分析及抗滑桩优化设计 [D].西安:西安工业大学,2016.
[17] 张安琪.水流淘刷作用下土质边坡稳定性研究 [D].哈尔滨:东北农业大学,2017.
[18] TA W,WANG H,JIA X.The contribution of aeolian processes to fluvial sediment yield from a desert watershed in the Ordos Plateau,China [J].Hydrological Processes,2014,29(1):80-89.
[19] 张永双,张士运,曲永新,等.黄土高原北部坍窑灾害的形成机理分析[J].地球学报,2004(5):565-569.
[20] 唐亚明,薛强,李政国,等.基于单体和区域尺度的黄土滑坡监测预警方法与实例 [J].灾害学,2015,30(4):91-95+106.
[21] 范立民,李勇,宁奎斌,等.黄土沟壑区小型滑坡致大灾及其机理 [J].灾害学,2015,30(3):67-70.