强降雨作用下黄土陡坡开裂特性测试

doi:10.13278/j.cnki.jjuese.20210021

吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (5): 1338-1346.doi: 10.13278/j.cnki.jjuese.20210021

强降雨作用下黄土陡坡开裂特性测试

王磊^1,2, 李荣建¹, 杨正午³, 刘军定¹, 白维仕¹

1. 西安理工大学岩土工程研究所, 西安 710048;
2. 延安大学建筑工程学院, 陕西延安 716000;
3. 信息产业电子第十一设计研究院科技工程股份有限公司, 西安 710100

收稿日期:2021-01-20 出版日期:2021-09-26 发布日期:2021-09-29
通讯作者: 李荣建(1969-),男,教授,博士生导师,主要从事黄土力学、岩土工程抗震与边坡工程等方面的研究,E-mail:lirongjian@xaut.edu.cn E-mail:lirongjian@xaut.edu.cn
作者简介:王磊(1985-),男,博士研究生,讲师,主要从事黄土力学及边坡工程方面的研究,E-mail:wanglei7015@163.com
基金资助:
国家自然科学基金项目（51768073）；陕西省教育厅专项科研项目（20JK0991）；延安大学科研计划项目（YDQ2019-33）

Experimental Study on Cracking Characteristics of Loess Steep Slope Under Intensive Rainfall

Wang Lei^1,2, Li Rongjian¹, Yang Zhengwu³, Liu Junding¹, Bai Weishi¹

1. Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China;
2. Architectural Engineering Institute, Yan'an University, Yan'an 716000, Shaanxi, China;
3. The IT Electronics Eleventh Design & Research Institute Scientific and Technological Engineering Corporation Limited, Xi'an 710100, China

Received:2021-01-20 Online:2021-09-26 Published:2021-09-29
Supported by:
Supported by the National Natural Science Foundation of China (51768073), the Special Scientific Research Project of Shaanxi Provincial Department of Education (20JK0991) and the Research Program of Yan'an University (YDQ2019-33)

摘要/Abstract

摘要： 降雨诱发黄土边坡失稳具有严重的破坏性。为了研究强降雨条件下黄土陡坡的开裂特性，在陕北吴起开展了黄土陡坡现场人工模拟中雨和大雨试验，分析了坡体含水率及土压力响应，总结了边坡开裂特征、开裂模式及土工布隔离槽的工程效应。研究结果表明：24 h中雨条件下黄土陡坡含水率和土压力上升幅度有限，而144 h大雨条件下边坡表层形成较大厚度的临近饱和区且表层土压力增长明显；144 h大雨条件下黄土陡坡的破坏顺序为坡顶开裂—坡面鼓胀—局部滑动贯通，并且坡顶开裂具有易发性和先导性；边坡破坏模式为自坡顶至坡面的贯通浅层破坏。

关键词: 强降雨, 黄土陡坡, 开裂特性, 隔离边界, 侧向约束

Abstract: Instability of loess slopes induced by rainfall is severely destructive. In order to study the cracking characteristics of loess steep slopes under intensive rainfall, the field artificially simulated moderate rain and heave rain tests of loess steep slopes were carried out in Wuqi, northern Shaanxi Province. The water content and earth pressure of slopes were analyzed, along with their cracking characteristics and cracking patterns. The engineering effects of geotextile isolation grooves were summarized. The results showed that the rise of water content and earth pressure of the loess steep slope was little after 24 h moderate rain; While a thicker adjacent saturated zone was formed on the surface after 144 h heave rain, and the earth pressure increased significantly. The main failure sequence of the loess steep slope under the condition of 144 h heavy rain was top cracking, surface bulging, and local sliding in. The top crack of the slope is a precursor, and the failure mode of the slope is a shallow failure from the top to the surface of the slope.

Key words: intensive rainfall, loess steep slope, cracking characteristics, isolation groove, lateral constraint

中图分类号:

TU43

王磊, 李荣建, 杨正午, 刘军定, 白维仕. 强降雨作用下黄土陡坡开裂特性测试[J]. 吉林大学学报(地球科学版), 2021, 51(5): 1338-1346.

Wang Lei, Li Rongjian, Yang Zhengwu, Liu Junding, Bai Weishi. Experimental Study on Cracking Characteristics of Loess Steep Slope Under Intensive Rainfall[J]. Journal of Jilin University(Earth Science Edition), 2021, 51(5): 1338-1346.

参考文献

[1] 黄润秋. 20世纪以来中国的大型滑坡及其发生机制[J]. 岩石力学与工程学报, 2007, 26(3):433-454. Huang Runqiu. Large-Scale Landslides and Their Sliding Mechanisms in China Since the 20th Century[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(3):433-454.
[2] 王进, 冷先伦, 阮航, 等. 强降雨作用下浅层滑坡的入渗及稳定性[J]. 东南大学学报(自然科学版), 2016, 46(增刊1):153-158. Wang Jin, Leng Xianlun, Ruan Hang, et al. Infiltration and Stability of Shallow Landslide Under Intensive Rainfall Conditions[J]. Journal of Southeast University (Natural Science Edition), 2016, 46(Sup.1):153-158.
[3] 段钊, 赵法锁, 陈新建. 陕北黄土高原区滑坡发育类型与时空分布特征:以吴起县为例[J]. 灾害学, 2011, 26(4):52-56. Duan Zhao, Zhao Fasuo, Chen Xinjian. Types and Spatio-Temporal Distribution of Loess Landslides in Loess Plateau Region:A Case Study in Wuqi County[J]. Journal of Catastrophology, 2011, 26(4):52-56.
[4] Tu X B, Kwong A K L, Dai F C, et al. Field Monitoring of Rainfall Infiltration in a Loess Slope and Analysis of Failure Mechanism of Rainfall-Induced Landslides[J]. Engineering Geology, 2009, 105:134-150.
[5] 陈兴岗, 杨果林. 南友公路膨胀土路堑边坡的现场监测分析[J]. 铁道建筑, 2007, 4(1):71-73. Chen Xinggang, Yang Guolin. Field Monitoring Analysis of Expansive Soil Cutting Slope of Nanyou Highway[J]. Railway Engineering, 2007, 4(1):71-73.
[6] 武彩萍, 骆亚生, 陈伟, 等. 降雨对黄土裸坡坡面形态影响的室内模型试验[J]. 水土保持通报, 2013, 33(1):115-119. Wu Caiping, Luo Yasheng, Chen Wei, et al. Indoor Model Experiment for Rainfall Effects on Bare Loess Slope Shape[J]. Bulletin of Soil and Water Conservation, 2013, 33(1):115-119.
[7] 常晓军, 葛伟亚, 于洋, 等. 福建省永泰县东门旗山滑坡诱发机理与防治措施[J]. 吉林大学学报(地球科学版), 2019, 49(4):1063-1072. Chang Xiaojun, Ge Weiya, Yu Yang, et al. Mechanismand Mitigation Measures of Qishan Landslide of Yongtai in Fujian Province[J]. Journal of Jilin University (Earth Science Edition), 2019, 49(4):1063-1072.
[8] 林鸿州, 于玉贞, 李广信, 等. 降雨特性对土质边坡失稳的影响[J]. 岩石力学与工程学报, 2009, 28(1):198-204. Lin Hungchou, Yu Yuzhen, Li Guangxin, et al. Influence of Rainfall Characteristics on Soil Slope Failure[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(1):198-204.
[9] 詹良通, 吴宏伟, 包承纲, 等. 降雨入渗条件下非饱和膨胀土边坡原位监测[J]. 岩土力学, 2003, 24(2):151-158. Zhan Liangtong, NG C W W, Bao Chenggang, et al. Artificial Rainfall Infiltration Tests on a Well-Instrumented Unsaturated Expansive Soil Slope[J]. Rock and Soil Mechanics, 2003, 24(2):151-158.
[10] 郑光, 许强, 林峰, 等. 2012年6·29贵州岑巩龙家坡滑坡灾害的基本特征与成因机理:一个由侧向剪切扰动诱发大型滑坡的典型案例[J]. 吉林大学学报(地球科学版), 2014, 44(3):932-945. Zheng Guang, Xu Qiang, Lin Feng, et al. Characteristics and Failure Mechanism of the Longjiapo Landslide in Cengong, Guizhou on June 29, 2012:A Case of Catastrophic Landslides Triggered by Lateral Shear Disturbance[J]. Journal of Jilin University (Earth Science Edition), 2014, 44(3):932-945.
[11] 蒋泽锋, 朱大勇. 强降雨条件下具有张裂缝边坡临界滑动场[J]. 岩土力学, 2016, 37(增刊2):25-34. Jiang Zefeng, Zhu Dayong. Critical Slip Field of Slope with Tension Crack Under Intensive Rainfall[J]. Rock and Soil Mechanics, 2016, 37(Sup.2):25-34.
[12] 徐学军, 王罗斌, 何子杰. 坡顶竖向裂缝对边坡稳定性影响的研究[J]. 人民长江, 2009, 40(22):46-48. Xu Xuejun, Wang Luobin, He Zijie. Study of Influence of Vertical Cracks on Slope Stability[J]. Yangtze River, 2009, 40(22):46-48.
[13] 刘博, 孙树林, 刘俊, 等. 降雨入渗条件下裂隙发育的黄土边坡稳定性分析研究[J]. 工程勘察, 2016, 44(10):16-21, 78. Liu Bo, Sun Shulin, Liu Jun, et al. Fissure Developed Loess Slope Stability Analysis Under Rainfall Infiltration[J]. Geotechnical Investigation & Surveying, 2016, 44(10):16-21, 78.
[14] 刘华磊, 徐则民, 张勇, 等. 降雨条件下边坡裂缝的演化机制及对边坡稳定性影响:以云南省双柏县丁家坟滑坡为例[J]. 灾害学, 2011, 26(1):26-29. Liu Hualei, Xu Zemin, Zhang Yong, et al. Evolutionary Mechanism of Slope Fissures During Rainfall and Their Effection Slope Stability:A Case Study of Dingjiafen Landslide in Shuangbo Country, Yunnan[J]. Journal of Catastrophology, 2011, 26(1):26-29.
[15] 张我华, 陈合龙, 陈云敏. 降雨裂缝渗透影响下山体边坡失稳灾变分析[J]. 浙江大学学报(工学版), 2007, 41(9):1429-1435, 1442. Zhang Wohua, Chen Helong, Chen Yunmin. Catastrophe Analysis for Disaster of Mountain Slope Stability Affected by Rainfall Seepage and Surface Crack[J]. Journal of Zhejiang University (Engineering Science), 2007, 41(9):1429-1435, 1442.
[16] 潘俊义, 王治军, 李荣建, 等. 现场人工降雨边坡试验中隔渗和减阻的侧向边界实现方法:中国, CN201710251899.8[P]. 2017-04-18. Pan Junyi, Wang Zhijun, Li Rongjian, et al.Realization Method of Lateral Boundary for Seepage Isolation and Drag Reduction in Field Artificial Rainfall Slope Test:China, CN201710251899.8[P]. 2017-04-18.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

强降雨作用下黄土陡坡开裂特性测试

Experimental Study on Cracking Characteristics of Loess Steep Slope Under Intensive Rainfall

PDF (PC)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

Metrics

本文评价

推荐阅读 10