›› 2015, Vol. 36 ›› Issue (S1): 159-168.doi: 10.16285/j.rsm.2015.S1.027

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on failure mechanism of shallow instability of expansive soil slope based on multifield coupling numerical analysis

DING Jin-hua1, CHEN Ren-peng2, TONG Jun1, GONG Bi-wei1   

  1. 1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan, Hubei 430010, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China
  • Received:2015-03-04 Online:2015-07-11 Published:2018-06-14

PDF (Chinese)

1560

Abstract: The progressive failure of expansive soil slope at shallow depth occurs frequently; but the traditional limit equilibrium theory can not reflect properly particularities of shallow instability of expansive soil slope. Based on a series of large static physical model tests of the compacted expansive soil slope, this paper firstly simulated the moisture field distribution by the unsaturated model of two-phase flow of FLAC; and then, by referencing the temperature expansion theory, a back analysis of the moisture swelling coefficient of expansive soil is conducted according to the indoor expansion tests with or without vertical loading. Finally, a multifield coupling numerical analysis method with moisture field, swelling deformation field and stress field is proposed. Combining the physical model tests with multifield coupling numerical analysis, the expansion failure mechanism for the shallow instability of expansive soil slope is expounded.

Key words: expansive soil slope, progressive failure, swelling deformation, unsaturated seepage, moisture swelling coefficient

CLC Number: 

  • TU 443
[1] DENG Peng-hai, LIU Quan-sheng, HUANG Xing, . Progressive fracture and swelling deformation of tunnel floor: a new floor heave mechanism [J]. Rock and Soil Mechanics, 2023, 44(5): 1512-1529.
[2] ZHU Tao, YIN Xiang, WANG Cheng-tang, MIN Hong, WANG Hao, CHEN Yu, HE Jun-lin, . Deformation evolution law and formation mechanism of landslide in north stope of Taihe mine, Xichang [J]. Rock and Soil Mechanics, 2022, 43(S2): 392-400.
[3] BAO Han, CHEN Zhi-yang, LAN Heng-xing, PEI Run-sheng, WU Fa-quan, YAN Chang-gen, TAO Yue, . Progressive failure strength characteristics of anisotropic rocks caused by mineral directional arrangement: a case of biotite quartz schist [J]. Rock and Soil Mechanics, 2022, 43(8): 2060-2070.
[4] LU Ying-fa, HU Peng, ZHONG Yao, ZHANG Yu-fang, JIANG Jun-jie, . Control design based on progressive failure characteristics of slope: taking Budaiying slope in Shiyan city, Hubei province as an example [J]. Rock and Soil Mechanics, 2022, 43(8): 2277-2286.
[5] HOU Xiao-ping, FAN Heng-hui. Study on rainfall infiltration characteristics of unsaturated fractured soil based on COMSOL Multiphysics [J]. Rock and Soil Mechanics, 2022, 43(2): 563-572.
[6] LI Qiang, JIA Sen, LI Xin, WU Bi-ze, SHANG Yan-liang, DONG Jun, . An improved Green-Ampt model considering unsaturated infiltration zone [J]. Rock and Soil Mechanics, 2022, 43(12): 3484-3492.
[7] ZHANG Zhen, ZHANG Zhao, YE Guan-bao, WANG Meng, XIAO Yan, CHENG Yi, . Progressive failure mechanism of stiffened deep mixed column-supported embankment [J]. Rock and Soil Mechanics, 2020, 41(6): 2122-2131.
[8] XUE Yang, WU Yi-ping, MIAO Fa-sheng, LI Lin-wei, LIAO Kang, ZHANG Long-fei. Seepage and deformation analysis of Baishuihe landslide considering spatial variability of saturated hydraulic conductivity under reservoir water level fluctuation [J]. Rock and Soil Mechanics, 2020, 41(5): 1709-1720.
[9] WANG Wei, CHEN Guo-qing, ZHENG Shui-quan, ZHANG Guang-ze, WANG Dong, . Study on the vector sum method of slope considering tensile-shear progressive failure [J]. Rock and Soil Mechanics, 2019, 40(S1): 468-476.
[10] LI Shi-jun, MA Chang-hui, LIU Ying-ming, HAN Yu-zhen, ZHANG Bin, ZHANG Ga, . Centrifuge model tests and numerical simulation on progressive failure behavior of slope above a mine-out area [J]. Rock and Soil Mechanics, 2019, 40(4): 1577-1583.
[11] ZHOU Hui, SONG Ming, ZHANG Chuan-qing, LU Jing-jing, LIU Zhen-jiang, SHI Lin-ken, . Effect of confining pressure on mechanical properties of horizontal layered composite rock [J]. Rock and Soil Mechanics, 2019, 40(2): 465-473.
[12] ZHANG Long-fei, WU Yi-ping, MIAO Fa-sheng, LI Lin-wei, KANG Tian. Mechanical model and stability analysis of progressive failure for thrust-type gently inclined shallow landslide [J]. Rock and Soil Mechanics, 2019, 40(12): 4767-4776.
[13] YANG He-ping, TANG Xian-yuan, WANG Xing-zheng, XIAO Jie, NI Xiao，. Shear strength of expansive soils under wet-dry cycles with loading [J]. , 2018, 39(7): 2311-2317.
[14] YANG Li-ping. Analysis of progressive failure of a loess landslide [J]. , 2018, 39(7): 2591-2598.
[15] ZHANG Chen-yang, ZHANG Ming, ZHANG Tai-li, SUN Qiang, YANG Long，. Impact of dyke and its residual soil on seepage and stability of Zhonglin landslide [J]. , 2018, 39(7): 2617-2625.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] WEI Li，CHAI Shou-xi，CAI Hong-zhou，WANG Xiao-yan，LI Min3，SHI Qian. Research on tensility of wheat straw for reinforced material[J]. , 2010, 31(1): 128 -132 .
[2] HUANG Qing-xiang, ZHANG Pei, DONG Ai-ju. Mathematical model of “arch beam” of thick sandy soil layer movement in shallow seam[J]. , 2009, 30(9): 2722 -2726 .
[3] JING Zhi-dong, LIU Jun-xin. Experimental research on dynamic deformations of semi-rigid structures of subgrade bed-mudstone of red beds[J]. , 2010, 31(7): 2116 -2121 .
[4] LIU Zheng-hong，LIAO Yan-hong，ZHANG Yu-shou. Preliminary study of physico-mechanical properties of Luanda sand[J]. , 2010, 31(S1): 121 -126 .
[5] WANG Deng-ke，LIU Jian，YIN Guang-zhi，WEI Li-de. Research on influencing factors of permeability change for outburst-prone coal[J]. , 2010, 31(11): 3469 -3474 .
[6] FAN Heng-hui, GAO Jian-en, WU Pu-te, LUO Zong-ke. Physicochemical actions of stabilized soil with cement-based soil stabilizer[J]. , 2010, 31(12): 3741 -3745 .
[7] ZHANG Cheng-ping，ZHANG Ding-li，LUO Jian-jun，WANG Meng-shu，WU Jie-pu. Remote monitoring system applied to the construction of metro station undercrossing existing metro tunnel[J]. , 2009, 30(6): 1861 -1866 .
[8] WANG Jun, CAO Ping, LI Jiang-teng, LIU Ye-ke. Analysis of stability of tunnel-slope with rheological medium under rainfall infiltration[J]. , 2009, 30(7): 2158 -2162 .
[9] ZHANG Yuan, WAN Zhi-jun, KANG Jian-rong, ZHAO Yang-sheng. Analysis of stage characteristics of sandstone permeability under conditions of temperature and triaxial stress[J]. , 2011, 32(3): 677 -683 .
[10] ZHANG Xue-chan , GONG Xiao-nan , YIN Xu-yuan , ZHAO Yu-bo. Monitoring analysis of retaining structures for Jiangnan foundation pit of Qingchun road river-crossing tunnel in Hangzhou[J]. , 2011, 32(S1): 488 -0494 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd