Geomechanics and Engineering

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The July 2, 2017, Lantian landslide in Leibo, China: mechanisms and mitigation measures

  • He, Kun (Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University) ;
  • Ma, Guotao (Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University) ;
  • Hu, Xiewen (Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University) ;
  • Liu, Bo (Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University) ;
  • Han, Mei (School of Mathematics, Southwest Jiaotong University)
  • Received : 2020.05.06
  • Accepted : 2021.12.08
  • Published : 2022.02.10
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Abstract

Landslides triggered by the combination of heavy precipitation and anthropological disturbance in hilly areas cause severe damage to human lives, properties, and infrastructure constructions. A comprehensive investigation of the influencing factors and failure mechanisms of landslides are significant for disaster mitigation and prevention. This paper utilized the combination of detailed geological investigation, physical experimental testing as well as numerical modelling to determine the failure mechanism, and proposed a countermeasures of the Lantian landslide occurred on 2, July 2017. The results reveal that the Lantian landslide is a catastrophic reactivated slide which occurred in an active tectonic region in Southwest China. Because of the unique geological settings, the fully to highly weathered basalts in the study area with well-developed fractures favored the rainwater infiltration, which is the beneficial to slide reactivation. Engineering excavation and heavy precipitation are the main triggering factors to activate the slide motion. Two failure stages have been identified in the landslide. The first phase involves a shallow mass collapse originated at the upper slopes, which extends from the road to platform at rear part, which is triggered by excavation in the landslide region. Subjected to the following prolonged rainfall from 19 June to 2 July, 2017, the pore water pressure of the slope continually increased, and the groundwater table successively rise, resulting in a significant decrease of soil strength which leads to successive large-scale deep slide. Thereinto, the shallow collapse played a significant role in the formation of the deep slide. Based on the formation mechanisms of the landslide, detailed engineering mitigation measures, involving slope cutting, anchor cable frame, shotcrete and anchorage, retaining wall and intercepting ditch were suggested to reduce the future failure risk of the landslide.

Keywords

Acknowledgement

The research described in this paper was financially supported by the National Key Research and Development Program of China (2018YFC1505401), the National Natural Science Foundation of China (41731285), and the Youth Fund Project of NSFC (41907225) and Open fund of State Key Laboratory of geological disaster prevention and geological environment protection (Grants No. SKLGP2018K011), and the China Scholarship Council (202107000060).

References

  1. Abderahman, N. (2006), "Evaluating the influence of rate of undercutting on the stability of slopes", Bull. Eng. Geol. Environ., 66(3), 303-309. https://doi.org/10.1007/s10064-006-0078-6.
  2. Acharya, K.P., Yatabe, R., Bhandary, N.P. and Dahal, R.K. (2014), "Deterministic slope failure hazard assessment in a model catchment and its replication in neighborhood terrain", Geomat. Nat. Haz. Risk, 7(1), 156-185. https://doi.org/10.1080/19475705.2014.880856.
  3. Acharya, K.P., Bhandary, N.P., Daha, R.K. and Yatabe, R. (2015), "Numerical analysis on influence of principal parameters of topography on hillslope instability in a small catchment", Environ. Earth Sci., 73, 5643-5656. https://doi.org/10.1007/s12665-014-3819-z.
  4. Ali, J.R., Thompson, G.M., Zhou, M.F. and Song, X. (2005), "Emeishan large igneous province", SW China. Lithos, 79(3-4), 475-489. https://doi.org/10.1016/j.lithos.2004.09.013.
  5. Boulfoul, K., Hammoud, F. and Abbeche, K. (2020), "Numerical study on the optimal position of a pile for stabilization purpose of a slope", Geomech. Eng., 21(5), 401-411. https://doi.org/10.12989/gae.2020.21.5.401.
  6. Brinkgreve, R.B.J., Swolfs, V.M. and Engin, E. (2010), Plaxis 2D 2010. Manual.
  7. Cheng, X.F., Zhu, C.B., Qi, W.F., Xu, J. and Yuan, J. (2015), "Formation conditions,development tendency and preventive measures of pufu landslide in luquan of Yunnan", Mineral Resources & Geology, 29(3), 395-401.
  8. Crosta, G.B. (2003), "Distributed modelling of shallow landslides triggered by intense rainfall", Nat. Hazard. Earth Syst. Sci., 3, 81-93. https://doi.org/10.5194/nhess-3-81-2003
  9. Fawaz, A., Farah, E. and Hagechehade, F. (2014), "Slope stability analysis using numerical modelling", Am. J. Civ. Eng., 2(3), 60-67. https://doi.org/10.11648/j.ajce.20140203.11.
  10. Froude, M.J. and Petley, D.N. (2018), "Global fatal landslide occurrence from 2004 to 2016", Nat. Hazard. Earth Syst. Sci., 18(8), 2161-2181. https://doi.org/10.5194/nhess-18-2161-2018.
  11. Genuchten, M.T.V. (1980), "A closed-form equation for predicting the hydraulic conductivity of unsaturated soils", Soil Sci. Soc. Am. J., 44(5), 892-898. https://doi.org/10.2136/sssaj1980.03615995004400050002x.
  12. GEO-SLOPE International Ltd (2007a), Seepage modeling with SEEP/W 2007: an engineering methodology, user's guide. GEO-SLOPE International Ltd, Calgary.
  13. GEO-SLOPE International Ltd (2007b), Stress-deformation modeling with SIGMA/W 2007 version: an engineering methodology. GEO-SLOPE International Ltd, Calgary.
  14. Guo, J., Yi, S., Yin, Y., Cui, Y., Qin, M., Li, T. and Wang, C. (2020), "The effect of topography on landslide kinematics: a case study of the Jichang town landslide in Guizhou, China", Landslides, 17, 959-973. https://doi.org/10.1007/s10346-019-01339-9.
  15. Han, Z.J., He, Y.L., An, Y.F. and Li, C.Y. (2009), "A new seismotectonic belt: features of the latest structural deformation style in the Mabian seismotectonic zone", Acta Geologica Sinica, 83, 218-229. https://doi.org/10.3321/j.issn:0001-5717.2009.02.007
  16. He, K., Ma, G., Hu, X., Luo, G., Mei, X., Liu, B. and He, X. (2019), "Characteristics and mechanisms of coupled road and rainfall-induced landslide in Sichuan China", Geomatics, Nat. Hazard. Risk, 10(1), 2313-2329. https://doi.org/10.1080/19475705.2019.1694230.
  17. He, K., Ma, G. and Hu, X. (2021a), "Formation mechanisms and evolution model of the tectonic-related ancient giant basalt landslide in Yanyuan County, China", Nat. Hazards, 106, 2575-2597. https://doi.org/10.1007/s11069-021-04555-6.
  18. He, K., Ma, G., Hu, X. and Liu, B. (2021b), "Failure mechanism and stability analysis of a reactivated landslide occurrence in Yanyuan City, China", Landslide, 18(3), 1097-1114. https://doi.org/10.1007/s10346-020-01571-8.
  19. He, K., Liu, B. and Hu, X. (2021c), "Preliminary reports of a catastrophic landslide occurred on August 21, 2020, in Hanyuan County, Sichuan Province, China", Landslides, 18(1), 503-507. https://doi.org/10.1007/s10346-020-01566-5.
  20. Hu, X., Zhang, M., Sun, M., Huang, K. and Song, Y. (2013), "Deformation characteristics and failure mode of the Zhujiadian landslide in the Three Gorges Reservoir, China', Bull. Eng. Geol. Environ., 74(1), 1-12. https://doi.org/10.1007/s10064-013-0552-x.
  21. Huang, R. (2009), "Some catastrophic landslides since the Twentieth Century in the southwest of China", Landslides, 6(1), 69-81. https://doi.org/10.1007/s10346-009-0142-y.
  22. Kainthola, A., Singh, P.K. and Singh, T.N. (2015), "Stability investigation of road cut slope in basaltic rockmass, Mahabaleshwar, India", Geosci. Frontiers, 6(6), 837-845. https://doi.org/10.1016/j.gsf.2014.03.002.
  23. Kang, G.C., Song, Y.S. and Kim, T.H. (2009), "Behavior and stability of a large-scale cut slope considering reinforcement stages", Landslides, 6(3), 263-272. https://doi.org/10.1007/s10346-009-0164-5.
  24. Li, H.B., Xu, Y.R., Zhou, J.W., Wang, X.K., Yamagishi, H. and Dou, J. (2020), "Preliminary analyses of a catastrophic landslide occurred on July 23, 2019, in Guizhou Province, China", Landslides. 17, 719-724. https://doi.org/10.1007/s10346-019-01334-0.
  25. Lin, J., (1985), "Spatial and temporal distribution of Permian basalts and their geological characteristics in three provinces in southwest China", Chinese Science Bulletin, 30(12), 929-935. https://doi.org/10.1360/csb1985-30-12-929
  26. Lin, F., Wu, L. Z., Huang, R. Q., Zhang, H. (2017), Formation and characteristics of the Xiaoba landslide in Fuquan, Guizhou, China. Landslides, 15(4), 669-681. https://doi.org/10.1007/s10346-017-0897-5.
  27. Liu, B., Hu, X., He, K., He, S., Shi, H. and Liu, D. (2020), "The starting mechanism and movement process of the coseismic rockslide: A case study of the Laoyingyan rockslide induced by the "5.12" Wenchuan earthquake", J. Mountain Sci., 17(5), 1188-1205. https://doi.org/10.1007/s11629-019-5775-2.
  28. Liu, B., He, K., Han, M., Hu, X., Wu, T., Wu, M. and Ma, G. (2021), "Dynamic process simulation of the Xiaogangjian rockslide occurred in shattered mountain based on 3DEC and DFN", Comput. Geotech., 134, 104122. https://doi.org/10.1016/j.compgeo.2021.104122.
  29. Liu, N.N., Liu, W.L. and Wu, D.C. (2006), "A thrust fault in a hydropower plant reservoir region in the southwest China", J. Eng. Geol., 14(1), 13-17. https://doi.org/10.3969/j.issn.1004-9665.2006.01.003
  30. Luo, G., Hu, X., Bowman, E.T. and Liang, J. (2017), "Stability evaluation and prediction of the Dongla reactivated ancient landslide as well as emergency mitigation for the Dongla Bridge", Landslides, 14, 1403-1418. https://doi.org/10.1007/s10346-017-0796-9.
  31. Ma, G., Hu, X., Yin, Y., Luo, G. and Pan, Y. (2018), "Failure mechanisms and development of catastrophic rockslides triggered by precipitation and open-pit mining in Emei, Sichuan, China", Landslides, 15, 1401-1414. https://doi.org/10.1007/s10346-018-0981-5.
  32. Ma, G., Rezania, M. and Mousavi, N.M. (2021a), "Effects of spatial auto-correlation structure for friction angle on runout distance in heterogeneous sand collapse", Transportation Geotechnics, https://doi.org/10.1016/j.trgeo.2021.100705.
  33. Ma, G., Rezania, M., Mousavi, N.M. and Hu, X. (2021b), "Uncertainty quantification of landslide runout motion considering soil interdependent anisotropy and fabric orientation", Landslides, (Accepted)
  34. Ma, G., Rezania, M. and Mousavi, N.M. (2021c), "Stochastic assessment of landslide influence zone by material point method and generalized geotechnical random field theory", Int. J. Geomech., (Accepted)
  35. Morgenstern, N.R. and Price, V.E. (1965), "Analysis of stability of general slip surfaces", Geotechnique, 15, 79-93. https://doi.org/10.1680/geot.1965.15.1.79
  36. Nguyen, L.C., Tien, P.V. and Do, T.N. (2019), "Deep-seated rainfall-induced landslides on a new expressway: a case study in Vietnam", Landslides. 17, 395-407. https://doi.org/10.1007/s10346-019-01293-6.
  37. Nguyen, T.S., Likitlersuang, S., Ohtsu, H. and Kitaoka, T. (2017), "Influence of the spatial variability of shear strength parameters on rainfall induced landslides: a case study of sandstone slope in Japan", Arabian J. Geosci., 10(16), 369. https://doi.org/10.1007/s12517-017-3158-y.
  38. Nguyen, T.S. and Likitlersuang, S. (2019), "Reliability analysis of unsaturated soil slope stability under infiltration considering hydraulic and shear strength parameters", Bull. Eng. Geol. Environ., 78(8), 5727-5743. https://doi.org/10.1007/s10064-019-01513-2.
  39. Peng, J., Wang, S., Wang, Q., Zhuang, J., Huang, W., Zhu, X. and Ma, P. (2018), "Distribution and genetic types of loess landlisdes in China", J. Asian Earth Sci., 170, 329-350. https://doi.org/10.1016/j.jseaes.2018.11.015.
  40. Ren, Z., Wang, K., Yang, K., Zhou, Z.H., Tang, Y.J., Tian, L. and Xu, Z.M. (2018), "The grain size distribution and composition of the Touzhai rock avalanche deposit in Yunnan, China", Eng. Geol., 234, 97-111. https://doi.org/10.1016/j.enggeo.2018.01.007.
  41. Schweiger, H.F., Fabris, C., Ausweger, G. and Hauser, L. (2018), "Examples of successful numerical modelling of complex geotechnical problems", Innov. Infrastruct. Solut., 4(1), 2. https://doi.org/10.1007/s41062-018-0189-5.
  42. Shen, T., Wang, Y., Huang, Z., Li, J., Zhang, X., Cao, W. and Gu, J. (2019), "Formation mechanism and movement processes of the Aizigou paleolandslide, Jinsha River, China", Landslides, 16(2), 409-424. https://doi.org/10.1007/s10346-018-1082-1.
  43. Wang, J.J., Liang, Y., Zhang, H.P., Wu, Y. and Lin, X. (2013), "A loess landslide induced by excavation and rainfall", Landslides, 11(1), 141-152. https://doi.org/10.1007/s10346-013-0418-0.
  44. Wang, M., Ma, G. and Wang, F. (2021), "Numerically investigation on blast-induced wave propagation in catastrophic large-scale bedding rockslide", Landslides, 18(1), 785-797. https://doi.org/10.1007/s10346-020-01537-w.
  45. Wen, B., Wang, S., Wang, E. and Zhang, J. (2004), "Characteristics of rapid giant landslides in China", Landslides, 1(4), 247-261. https://doi.org/10.1007/s10346-004-0022-4.
  46. Xing, A., Wang, G., Yin, Y., Tang, C., Xu, Z. and Li, W. (2016), "Investigation and dynamic analysis of a catastrophic rock avalanche on September 23, 1991, Zhaotong, China", Landslides, 13(5), 1035-1047. https://doi.org/10.1007/s10346-015-0617-y.
  47. Xu, Q., Fan, X. and Dong, X. (2011), "Characteristics and formation mechanism of a catastrophic rainfall-induced rock avalanche-mud flow in Sichuan, China, 2010", Landslides, 9(1), 143-154. https://doi.org/10.1007/s10346-011-0278-4.
  48. Xu, Y., Chung, S.L., Jahn, B.M. and Wu, G. (2001), "Petrologic and geochemical constraints on the petrogenesis of Permian-Triassic Emeishan flood basalts in southwestern China. Lithos", 58(3-4), 145-168. https://doi.org/10.1016/S0024-4937(01)00055-X.
  49. Xue, D., Li, T., Zhang, S., Ma, C., Gao, M. and Liu, J. (2018), "Failure mechanism and stabilization of a basalt rock slide with weak layers", Eng. Geol., 233, 213-224. https://doi.org/10.1016/j.enggeo.2017.12.005.
  50. Zhang, S., Yin, Y., Hu, X., Wang, W., Zhu, S., Zhang, N. and Cao, S. (2020), "Initiation mechanism of the Baige landslide on the upper reaches of the Jinsha River, China", Landslides, 17(12), 2865-2877. https://doi.org/10.1007/s10346-020-01495-3.
  51. Zhang, Y., Luo, Y. and Yang, C. (1988), Panxi rift region. Geology Press, Beijing, China.