Abstract
The loess tableland provides an excellent site for people to live and cultivate. However, flowslides occur frequently on the slope of loess tablelands due to agriculture irrigation, resulting in serious economic losses and casualties. The structure degradation effect of irrigation water seepage on intact loess leads to a weakening of its mechanical properties, which may be responsible for the recurrent occurrence of flowslides in irrigated loess tablelands. In this paper, seepage tests and triaxial tests were carried out to investigate the evolution of the microstructure and undrained shear properties of intact loess during seepage. The results show that water seepage leads to a significant decrease in pore water ion concentration and migration of fine particles with water flow, but no noticeably change in mineral composition. During seepage, the metastable structure of intact loess collapses, the fine particles disperse around the skeleton particle to fill the pores, and the total porosity decreases. The permeability coefficient gradually decreases with seepage time and then tends to a constant. The saturated intact loess shows strongly contractive behavior during undrained shear and has considerable liquefaction potential. After seepage, the intact loess is characterized by more rapid build-up of pore water pressure and more intense strain-softening during shearing and has lower shear strength (including peak strength and steady-state strength). In irrigated loess tablelands, long-term seepage could weaken the shear strength of intact loess and increases its liquefaction potential, which contributes to the initiation of loess flowslide failure and the movement with high-speeds and long run-outs.
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References
Abdullah WS, AlZoubi MS, Alshibli KA (1997) On the physicochemical aspects of compacted clay compressibility. Can Geotech J 34(4):551–559. https://doi.org/10.1139/t97-027
Atkinson J (2007) The mechanics of soils and foundation. New York: Taylor & Francis. pp 119–141.
Bishop AW (1973) The stability of tips and spoil heaps. Q J Eng Geol 6(3):1851–1861. https://doi.org/10.1144/gsl.qjeg.1973.006.03.15
Chu J, Leroueil S, Leong WK (2003) Unstable behaviour of sand and its implication for slope instability. Can Geotech J 40(5):873–885. https://doi.org/10.1139/t03-039
Dawson RF, Morgenstern NR, Stokes AW (1998) Liquefaction flowslides in Rocky Mountain coal mine waste dumps. Can Geotech J 35(2):328–343. https://doi.org/10.1139/t98-009
Di Maio C, Santoli L, Schiavone P (2004) Volume change behaviour of clays: the influence of mineral composition, pore fluid composition and stress state. Mech Mater 36(5/6):435–451. https://doi.org/10.1016/s0167-6636(03)00070-x
Di Maio C, Scaringi G, Vassallo R (2015) Residual strength and creep behaviour on the slip surface of specimens of a landslide in marine origin clay shales: influence of pore fluid composition. Landslides 12(4):657–667. https://doi.org/10.1007/s10346-014-0511-z
Dijkstra TA, Rogers CDF, Smalley IJ, et al. (1994) The loess of north-central China: Geotechnical properties and their relation to slope stability. Eng Geol 36(3–4):153–171. https://doi.org/10.1016/0148-9062(94)90337-9
Eckersley D (1990) Instrumented laboratory flowslides. Geotechnique 40(3):489–502. https://doi.org/10.1680/geot.1990.40.3.489
Fan XM, Xu Q, Scaringi G, et al. (2017) A chemo-mechanical insight into the failure mechanism of frequently occurred landslides in the Loess Plateau, Gansu Province, China. Eng Geol 228: 337–345. https://doi.org/10.1016/j.enggeo.2017.09.003
Guo P, Meng XM, Li YJ, et al. (2015) Effect of large dams and irrigation in the upper reaches of the Yellow River of China, and the geohazards burden. P Geologist Assoc 126(3):367–376. https://doi.org/10.1016/j.pgeola.2015.03.009
Harp EL, Wade II, Sarmiento JG (1990) Pore pressure response during failure in soils. Geol Soc Am Bull 102(4):428–438. https://doi.org/10.1130/0016-7606(1990)102<0428:pprdfi>2.3.co;2
Kramer SL, Seed HB (1988) Initiation of soil liquefaction under static loading conditions. J Geotech Engrg 114(4):412–430. https://doi.org/10.1061/(asce)0733-9410(1988)114:4(412)
Lei XY (1987) Pore types of the loess in China and its collapsibility. Sci Sin 12: 1309–1318. (In Chinese)
Leng YQ, Peng JB, Wang QY, et al. (2018) A fluidized landslide occurred in the Loess Plateau: A study on loess landslide in South **gyang tableland. Eng Geol 236: 129–136. https://doi.org/10.1016/j.enggeo.2017.05.006
Li P, Vanapalli S, Li TL (2016) Review of collapse triggering mechanism of collapsible soils due to wetting. J Rock Mech Geotech 8(02):256–274. https://doi.org/10.1016/j.jrmge.2015.12.002
Li SJ, Russell AR, Wood DM (2020) Influence of particle-size distribution homogeneity on shearing of soils subjected to internal erosion. Can Geotech J 57(11): 1684–1694. https://doi.org/10.1139/cgj-2019-0273
Liu Z, Liu FY, Ma FL, et al. (2016) Collapsibility, composition, and microstructure of loess in China. Can Geotech J 53: 673–686. https://doi.org/10.1139/cgj-2015-0285
Liu TS (1985) Loess and the environment. Science Press, Bei**g pp: 14–43. (In Chinese)
Li YR, Mo P (2019) A unified landslide classification system for loess slopes: A critical review. Geomorphology 340: 67–83. https://doi.org/10.1016/j.geomorph.2019.04.020
Meng J, Li XA (2019) Effects of carbonate on the structure and properties of loess and the corresponding mechanism: an experimental study of the Malan loess, **’an area, China. B Eng Geol Environ 78(7):4965–4976. https://doi.org/10.1007/s10064-018-01457-z
Moffat R, Fannin RJ, Garner SJ (2011) Spatial and temporal progression of internal erosion in cohesionless soil. Can Geotech J 48(3):399–412. https://doi.org/10.1139/t10-071
Murthy TG, Loukidis D, Carraro JAH, et al. (2007) Undrained monotonic response of clean and silty sands. Geotechnique 57(3):273–288. https://doi.org/10.1680/geot.2007.57.3.273
Olivares L, Damiano E (2007) Postfailure Mechanics of Landslides: Laboratory Investigation of Flowslides in Pyroclastic Soils. J Geotech Geoenviron 133(1):51–62. https://doi.org/10.1061/(asce)1090-0241(2007)133:1(51)
Peng DL, Xu Q, Liu FZ, et al. (2017) Distribution and failure modes of the landslides in Heitai terrace, China. Eng Geol 236: 97–110. https://doi.org/10.1016/j.enggeo.2017.09.016
Peng JB, Lin HZ, Wang QY, et al. (2014) The critical issues and creative concepts in mitigation research of loess ecological hazards. Chin J Eng Geol 22(04):684–691. (In Chinese)
Peng JB, Wang SK, Wang QY, et al. (2019) Distribution and genetic types of loess landslides in China. J Asian Earth Sci 170: 329–350. https://doi.org/10.1016/j.jseaes.2018.11.015
Poulos SJ, Castro G, France JW (1985) Liquefaction Evaluation Procedure. J Geotech Engrg 111(6):772–792. https://doi.org/10.1061/(asce)0733-9410(1985)111:6(772)
Qi X, Xu Q, Liu FZ (2017) Analysis of retrogressive loess flowslides in Heifangtai, China. Eng Geol 236: 119–128. https://doi.org/10.1016/j.enggeo.2017.08.028
Rahmani H, Naeini SA (2020) Influence of non-plastic fine on static liquefaction and undrained monotonic behavior of sandy gravel. Eng Geol 275: 105729. https://doi.org/10.1016/j.enggeo.2020.105729
Sadrekarimi A (2020) Forewarning of Static Liquefaction Landslides. J Geotech Geoenviron 146(9):04020090. https://doi.org/10.1061/(asce)gt.1943-5606.0002320
Sasitharan S, Robertson PK, Sego DC, et al. (1994) State-boundary surface for very loose sand and its practical implications. Can Geotech J 31(3):321–334. https://doi.org/10.1139/t94-040
Sladen JA, Dhollander RD, Krahn J (1985) The liquefaction of sands, a collapse surface approach. Can Geotech J 22(4):564–578. https://doi.org/10.1139/t85-076
Standardization Administration of China (SAC), Ministry of Water Resources, 2019. China National Standards GB/T50123-2019: Standard for Soil Test Method. China Planning Press, Bei**g. (In Chinese)
Take WA, Beddoe RA (2014) Base liquefaction: a mechanism for shear-induced failure of loose granular slopes. Can Geotech J 51(5):496–507. https://doi.org/10.1139/cgj-2012-0457
Wang GH, Sassa K (2002) Post-failure mobility of saturated sands in undrained load-controlled ring shear tests. Can Geotech J 39(4):821–837. https://doi.org/10.1139/t02-032
Wen BP, He L (2012) Influence of lixiviation by irrigation water on residual shear strength of weathered red mudstone in Northwest China: Implication for its role in landslides’ reactivation. Eng Geol 151: 56–63. https://doi.org/10.1016/j.enggeo.2012.08.005
Xu L, Coop MR (2016) Influence of structure on the behavior of a saturated clayey loess. Can Geotech J 53(6):1026–1037. https://doi.org/10.1139/cgj-2015-0200
Xu L, Coop MR, Zhang MS, et al. (2018) The mechanics of a saturated silty loess and implications for landslides. Eng Geol 236: 29–42. https://doi.org/10.1016/j.enggeo.2017.02.021
Xu L, Dai FC, Gong QM, et al. (2012) Irrigation-induced loess flow failure in Heifangtai Platform, North-West China. Environ Earth Sci 66(6):1707–1713. https://doi.org/10.1007/s12665-011-0950-y
Xu L, Dai FC, Tu XB, et al. (2014) Landslides in a loess platform, North-West China. Landslides 11(6):993–1005. https://doi.org/10.1007/s10346-013-0445-x
Xu PP, Zhang QY, Qian H, et al. (2020) Microstructure and permeability evolution of remolded loess with different dry densities under saturated seepage. Eng Geol 282(7):105875. https://doi.org/10.1016/j.enggeo.2020.105875
Yamamuro JA, Lade PV (1999) Static liquefaction of very loose sands. Can Geotech J 34(6):905–917. https://doi.org/10.1139/t97-057
Yan YJ, Wen BP, Huang ZQ (2017) Effect of soluble salts on shear strength of unsaturated remoulded loess in Lanzhou city. Chin J Rock Soil Mech 38(10): 2881–2887. (In Chinese)
Zhang DX, Wang GH, Luo CY, et al. (2009) A rapid loess flowslide triggered by irrigation in China. Landslides 6(1):55–60. https://doi.org/10.1007/s10346-008-0135-2
Zhang FY, Wang GH, Kamai T, et al. (2013) Undrained shear behavior of loess saturated with different concentrations of sodium chloride solution. Eng Geol 155(6):69–79. https://doi.org/10.1016/j.enggeo.2012.12.018
Zhang FY, Wang GH (2018) Effect of irrigation-induced densification on the post-failure behavior of loess flowslides occurring on the Heifangtai area, Gansu, China. Eng Geol 236(11):111–118. https://doi.org/10.1016/j.enggeo.2017.07.010
Zhang FY, Wang GH, Peng JB (2022) Initiation and mobility of recurring loess flowslides on the Heifangtai irrigated terrace in China: Insights from hydrogeological conditions and liquefaction criteria. Eng Geol 302: 106619. https://doi.org/10.1016/j.enggeo.2022.106619
Zhou YF, Tham LG, Yan WM, et al. (2014) Laboratory study on soil behavior in loess slope subjected to infiltration. Eng Geol 183: 31–38. https://doi.org/10.1016/j.enggeo.2014.09.010
Zhou YX, Zhang DX, Zhou XD (2010) Undrained consolidation triaxial test for flow sliding mechanism of loess landslides. Chin J Eng Geol 18(01):72–77. (In Chinese)
Zhuang JQ, Peng JB, Zhu Y, et al. (2020) The internal erosion process and effects of undisturbed loess due to water infiltration. Landslides 18(2):629–638. https://doi.org/10.1007/s10346-020-01518-z
Zuo L, Xu L, Baudet B, et al. (2020) The structure degradation of a silty loess induced by long-term water seepage. Eng Geol 272: 105634. https://doi.org/10.1016/j.enggeo.2020.105634
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This study was funded by the National Key R&D Program of China (Grant No. 2018YFC 1505304) and the National Natural Science Foundation of China (Grant Nos. 41877281, 41772339).
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Jian, T., Kong, Lw., Bai, W. et al. Evolution of macro-meso properties of intact loess under long-term seepage and its influence on irrigation-induced loess flowslides. J. Mt. Sci. 19, 2935–2951 (2022). https://doi.org/10.1007/s11629-022-7417-3
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DOI: https://doi.org/10.1007/s11629-022-7417-3