Slope Stability Considering the Effects of Air Pressure and Seepage Under Heavy Rainfall Conditions

被引：0
|
作者：
Yao M. [1 ]
Chen T. [1 ]
Fan R. [1 ]
Yang Z. [1 ]
Shi Y. [1 ]
机构：
[1] Key Laboratory for Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2022年 / 56卷 / 06期
关键词：
Closed air pressure; Initial water content; Rainfall infiltration; Seepage in saturated zone; Slope stability;
D O I：
10.16183/j.cnki.jsjtu.2021.302
中图分类号：
学科分类号：
摘要：
Rainfall infiltration analysis is one of the important methods for predicting engineering disasters. In order to effectively analyze the infiltration process of slope under heavy rainfall, based on the classical Green-Ampt model, a slope rainfall infiltration model considering the effect of saturated zone seepage and air pressure under the condition of non-uniform distribution of initial water content was established, and the corresponding expression of landslide stability coefficient was derived. The results show that the influence of slope size on rainfall infiltration is obvious. On the one hand, the expansion rate of wetting front increases with the increase of slope length, on the other hand, when considering the effect of air pressure, the smaller the slope length, the longer it takes to reach the same wet front. When the slope length increases to a certain extent, the difference is not obvious. In addition, the influence of seepage force on slope stability is greater than that of air pressure. Because the former gradually increases during the rainfall process while the latter is basically unchanged, the influence of seepage force increases, and the influence of air pressure decreases. © 2022, Editorial Board of Journal of Shanghai Jiao Tong University. All right reserved.
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页码：739 / 745
页数：6
相关论文
共 18 条
  • [1] CHO S E, LEE S R., Instability of unsaturated soil slopes due to infiltration, Computers & Geotechnics, 28, 3, pp. 185-208, (2001)
  • [2] GREEN W H., Studies on soil physics. Part 1: The flow of air and water through soils, Agricultural Science, 4, 1, pp. 1-24, (1911)
  • [3] MEIN R G, LARSON C L., Modeling infiltration during a steady rain, Water Resources Research, 9, 2, pp. 384-394, (1973)
  • [4] GAVIN K, XUE J., A simple method to analyze infiltration into unsaturated soil slopes, Computers and Geotechnics, 35, 2, pp. 223-230, (2008)
  • [5] CHEN L, YOUNG M H., Green-Ampt infiltration model for sloping surfaces, Water Resources Research, 42, 7, pp. 887-896, (2006)
  • [6] LI Ning, XU Jiancong, QIN Yazhou, Research on calculation model for stability evaluation of rainfall-induced shallow landslides, Rock & Soil Mechanics, 33, 5, pp. 1485-1490, (2012)
  • [7] WANG Dingjian, TANG Huiming, LI Changdong, Et al., Stability analysis of colluvial landslide due to heavy rainfall, Rock and Soil Mechanics, 2, pp. 439-445, (2016)
  • [8] LIU Z, YAN Z, DUAN J, Et al., Infiltration regulation and stability analysis of soil slope under sustained and small intensity rainfall, Journal of Central South University, 20, 9, pp. 2519-2527, (2013)
  • [9] ZHANG Jie, LV Te, XUE Jianfeng, Et al., Modified Green-Ampt model for analyzing rainfall infiltration in slopes, Rock and Soil Mechanics, 37, 9, pp. 2451-2457, (2016)
  • [10] JIAN Wenxing, JIANG Yi, Exponential model of rainfall infiltration of shallow landslides for non-ponding conditions, Safety and Environmental Engineering, 24, 1, pp. 22-25, (2017)
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