Poro-mechanical coupling influences on potential for rainfall-induced shallow landslides in unsaturated soils

被引：51
作者：
Wu, L. Z. [1 ]
Selvadurai, A. P. S. [2 ]
Zhang, L. M. [3 ]
Huang, R. Q. [1 ]
Huang, Jinsong [4 ]
机构：
[1] Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
[2] McGill Univ, Dept Civil Engn & Appl Mech, Montreal, PQ H3A 0C3, Canada
[3] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
[4] Univ Newcastle, ARC Ctr Excellence Geotech Sci & Engn, Callaghan, NSW 2308, Australia
来源：
ADVANCES IN WATER RESOURCES | 2016年 / 98卷
基金：
中国国家自然科学基金;
关键词：
Landslides; Slope stability; Unsaturated soil; Coupled infiltration and deformation; Rainfall infiltration; STRENGTH PARAMETERS; WATER INFILTRATION; INFINITE SLOPE; STABILITY; DEFORMATION; FAILURE; INSTABILITY; TABLE;
D O I：
10.1016/j.advwatres.2016.10.020
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
Rainfall-induced landslides are a common occurrence in terrain with steep topography and soils that have degradable strength. Rainfall infiltration into a partially saturated slope of infinite extent can lead to either a decrease or complete elimination of soil suction, compromising the slopes' stability. In this research the rainfall infiltration coupled with deformation of a partially saturated soil slope during rainfall infiltration is analyzed. The limit equilibrium conditions and the shear strength relationship of a partially saturated soil are employed to develop an analytical solution for calculating the stability of an infinite partially saturated slope due to rainfall infiltration. The analytical solutions are able to consider the influence of the coupled effects on the stability of the slope. The factors that affect the safety of a partially saturated slope of infinite extent are discussed. The results indicate that the poro-mechanical coupling of water infiltration and deformation has an important effect on the stability of the infinite unsaturated slope. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：114 / 121
页数：8
相关论文
共 41 条
[1]   Boundary effects of rainfall-induced landslides [J].
Ali, Abid ;
Huang, Jinsong ;
Lyamin, A. V. ;
Sloan, S. W. ;
Cassidy, M. J. .
COMPUTERS AND GEOTECHNICS, 2014, 61 :341-354
[2]   Influence of rainfall on the deformation and stability of a slope in overconsolidated clays: a case study [J].
Alonso, EE ;
Gens, A ;
Delahaye, CH .
HYDROGEOLOGY JOURNAL, 2003, 11 (01) :174-192
[3]   Factor of safety in a partially saturated slope inferred from hydro-mechanical continuum modeling [J].
Borja, Ronaldo I. ;
White, Joshua A. ;
Liu, Xiaoyu ;
Wu, Wei .
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 2012, 36 (02) :236-248
[4]   Soil stability and flow slides in unsaturated shallow slopes: can saturation events trigger liquefaction processes? [J].
Buscarnera, G. ;
Di Prisco, C. .
GEOTECHNIQUE, 2013, 63 (10) :801-817
[5]  
Cai Fei Cai Fei, 2004, International Journal of Geomechanics, V4, P69, DOI 10.1061/(ASCE)1532-3641(2004)4:2(69)
[6]   Modeling of Rainfall-Induced Shallow Landslides of the Flow-Type [J].
Cascini, Leonardo ;
Cuomo, Sabatino ;
Pastor, Manuel ;
Sorbin, Giuseppe .
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2010, 136 (01) :85-98
[7]   Simulation of a slope failure induced by rainfall infiltration [J].
Chen, R. H. ;
Chen, H. P. ;
Chen, K. S. ;
Zhung, H. B. .
ENVIRONMENTAL GEOLOGY, 2009, 58 (05) :943-952
[8]   Instability of unsaturated soil slopes due to infiltration [J].
Cho, SE ;
Lee, SR .
COMPUTERS AND GEOTECHNICS, 2001, 28 (03) :185-208
[9]   Stability analyses of rainfall induced landslides [J].
Collins, BD ;
Znidarcic, D .
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2004, 130 (04) :362-372
[10]   An integral-balance nonlinear model to simulate changes in soil moisture, groundwater and surface runoff dynamics at the hillslope scale [J].
Curtu, Rodica ;
Mantilla, Ricardo ;
Fonley, Morgan ;
Cunha, Luciana K. ;
Small, Scott J. ;
Jay, Laurent O. ;
Krajewski, Witold F. .
ADVANCES IN WATER RESOURCES, 2014, 71 :125-139
12345