Reactivation characteristics and dynamic hazard prediction of an ancient landslide in the east margin of Tibetan Plateau
Tóm tắt
The increasing human engineering activities and frequent extreme weather events have caused extensive reactivation of ancient landslides, which are widely developed in the east margin of Tibetan Plateau. The Shangyaogou landslide, as a typical ancient landslide example in this area, was investigated to reveal the reactivation characteristics, and its stability was calculated under the continuous rainfall condition with the intensity 30 mm/day using the finite element software Geo-Studio. The whole movement process and hazard prediction under the different triggering conditions were simulated using the numerical software DAN3D. The study results showed that: (1) under the joint influence of Mw 7.9 Wenchuan earthquake, toe erosion and intensive rainfall, multi-stage deformations occurred to the front part of the Shangyaogou landslide in multiple periods and also indicated a significant potential instability; (2) under the continuous rainfall condition, when the single effective total infiltration reached about 65 mm, the reactivation part will become unstable. While the single effective total infiltration reached about 120 mm, both reactivation part and posterior part became instability; (3) the maximum run-out distance of the reactivation part was calculated to be 350 m, and the forefront of the accumulation deposit would not reach the residential area; When both parts failed simultaneously, the maximum run-out distance was calculated to be 550 m by considering the thickness and dynamic energy of the accumulation deposits, and the vulnerable elements inside the fan area with radius of 150 m would be severely threatened; (4) abundant earthquake-triggered landslides have been developing in history or in recent years in the eastern margin of Tibetan Plateau. Some of them have been partly reactivated due to the increasing human engineering activities and extreme rainfall events, and they have a potential for further deformation and failure. The presented study methods can provide guidance for local disaster prevention and mitigation, and can be used as a reference for the hazard prediction of the similar ancient landslides which have been reactivated.
Tài liệu tham khảo
Armaş I (2014) Diagnosis of landslide risk for individual buildings: insights from Prahova Subcarpathians. Romania Environ Earth Sci 71(11):4637–4646
Burda J, Hartvich F, Valenta J, Smitka V, Rybar (2013) Climate-induced landslide reactivation at the edge of the Most Basin (Czech Republic)—progress towards better landslide prediction. Nat Hazards Earth Syst Sci 13:361–374
Chen H, Lee C (2003) A dynamic model for rainfall-induced landslides on natural slopes. Geomorphology 51(4):269–288
Crosta GB, Chen H, Frattini P (2006) Forecasting hazard scenarios and implications for the evaluation of countermeasure efficiency for large debris avalanches. Eng Geol 83:236–253
Cruden DM, Varnes DJ (1996) Landslide types and processes, special report, transportation research board. Nat Acad Sci 247:36–75
Dai F, Lee C, Deng J, Tham L (2005) The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China. Geomorphology 65(3):205–221
Deng J, Chen F, Yin H, Gao M, Meng Y, Huang R (2007) Geological origin and stability evaluation of Siwancun landslide in Luding County. Chin J Rock Mech Eng 26(10):1945–1950 (in Chinese)
Deng H, Wu L, Huang R, Guo X, He Q (2017) Formation of the Siwanli ancient landslide in the Dadu River, China. Landslides 14(1):385–394
Fan J (2008) The test research on soil landslide’s stability influenced by crack water. Chengdu Univ Tec, Chengdu (in Chinese)
GEO-SLOPE International Ltd (2008) Seepage modeling with SEEP/W 2007 version: an engineering methodology, 3rd edn. GEO-SLOPE International Ltd, Calgary
Giovanni G, Emanuele I, Luca L, Massimiliano N, William F, Marco B, Luca Domenico V, Nicola C (2014) Event scenario analysis for the design of rockslide countermeasures. J Mount Sci 11(6):1521–1530
Huang R (2007) Large-scale landslides and their sliding mechanisms in China since the 20th century. Chin J Rock Mech Eng 26(3):433–454 (in Chinese)
Hungr O (1995) A model for the runout analysis of rapid flow slides, debris flows, and avalanches. Can Geotech J 32(4):610–623
Hungr O, Evans SG (1996) Rock avalanche runout prediction using a dynamic model. In: Proceedings of the 7th international symposium on landslides, vol 17, Trondheim, p 21
Kuenza K, Towhata I, Orense RP, Wassan TH (2004) Undrained torsional shear tests on gravelly soils. Landslides 1(3):185–194
Li M, Zheng W, Shi S, Xie Z (2008) The revival mechanism and stability analysis to Jiaju landslide of Danba county in Sichuan province. J Mount Sci 26(5):577–582 (in Chinese)
Liu D, Ma J, Tian L, Shu H (2014) Dynamic characteristics of the Xieliupo landslide in Zhouqu County based on DAN-W. J Lanzhou Univ (Nat Sci) 50(5):733–738 (in Chinese)
Mcdougall S, Hungr H (2004) A model for the analysis of rapid landslide motion across three-dimensional terrain. Can Geotech J 41:1084–1097
Negi IS, Kumar K, Kathait A, Prasad PS (2013) Cost assessment of losses due to recent reactivation of Kaliasaur landslide on National Highway 58 in Garhwal Himalaya. Nat Hazards 68:901–914
Notti D, Galve JP, Mateos RM, Monserrat O, Lamas Fernandez F, Fernandez Chacon F, Roldan Garcia FJ, Perez Pena JV, Crosetto M, Azanon JM (2015) Human-induced coastal landslide reactivation, monitoring by PSInSAR techniques and urban damage survey (SE Spain). Landslides 12:1007–1014
Pirulli M (2009) The Thurwieser rock avalanche (Italian Alps): description and dynamic analysis. Eng Geol 109(1–2):80–92
Pirulli M, Scavia C, Hungr O (2004) Determination of rock avalanche run-out parameters through back analyses. In: Lacerda WA, Ehrlich M, Fontoura SAB, Sayão ASF (eds) Proceedings of the 9th International Symposium on Landslides, Rio de Janeiro. Balkema, London, pp 1361–1366
Qi C, Xing A, Yin Y, Li B (2012) Numerical simulation of dynamic behavior of Donghekou rockslide-debris avalanche. J Eng Geol 20(3):334–339 (in Chinese)
Ronchetti F, Borgattil L, Cervi F, Lucente C, Veneziano M, Corsini A (2007) The Valoria landslide reactivation in 2005–2006 (Northern Apennines, Italy). Landslides 4:189–195
Saez JL, Corona C, Stoffel M, Schoeneich P, Berger F (2012) Probability maps of landslide reactivation derived from tree-ring records: Pra Bellon landslide, southern French Alps. Geomorphology 138:189–202
Salvatici T, Morelli S, Pazzi V, Frodella W, Fanti R (2017) Debris flow hazard assessment by means of numerical simulations: implications for the Rotolon creek valley (Northern Italy). J Mount Sci 14(4):636–648
Sassa K, Nagai O, Solidum R, Yamazaki Y, Ohta H (2010) An integrated model simulating the initiation and motion of earthquake and rain induced rapid landslides and its application to the 2006 Leyte landslide. Landslides 7(3):219–236
Si J, Liu S (2008) Geological features, deformation sequence and evolution of the Minjiang fault on the eastern margin of the Qinghai–Tibet plateau. Acta Geol Sichuan 28(1):1–5 (in Chinese)
SL345-2007 (2007) Code of water injection test for water resources and hydropower engineering. Ministry of Water Resources of the People’s Republic of China, Beijing (in Chinese)
Sosio R, Crosta GB, Hungr O (2008) Complete dynamic modeling calibration for the Thurwieser rock avalanche (Italian Central Alps). Eng Geol 100(1–2):11–26
Wang G, Li B, Feng Z, Xing A (2014) Simulation of the process of the Jiguanling rock avalanche in Wulong of Chongqing. Hydrogeol Eng Geol 41(5):101–106 (in Chinese)
Wang L, Li B, Gao Y, Zhu S (2016) Run-out prediction of large thick-bedded unstable rock: a case study of Daxiang unstable rock in Yangjiao town, Wulong county, Chongqing. Frontier Earth Sci 23(2):251–259 (in Chinese)
Xu J, Shang Y (2007) Stability analysis of ancient debris landslide. Chin J Rock Mech Eng 26(1):57–65 (in Chinese)
Yang W, Huang X, Zhang Y, Liu T (2013) The deformation characteristics of the landslide along Pingding–Huama active fault zone and its prevention and control. Geol Bull China 32(12):1925–1935 (in Chinese)
Yin Y, Cheng Y, Liang J, Wang W (2015) Heavy-rainfall-induced catastrophic rockslide-debris flow at Sanxicun, Dujiangyan, after the Wenchuan Ms 8.0 earthquake. Landslides 13(1):9–23
Youssef AM, Maerz NH (2013) Overview of some geological hazards in the Saudi Arabia. Environ Earth Sci 70:3115–3130
Zhang L, Wang Y, Zhao W, Wang R, Jin X (2014) Research on the dynamics of debris flow based on different basal resistance conditions. Hydrogeol Eng Geol 41(4):113–118 (in Chinese)
Zhang Y, Guo C, Lan H, Zhou N, Yao X (2015) Reactivation mechanism of ancient giant landslides in the tectonically active zone: a case study in Southwest China. Environ Earth Sci 74(2):1719–1729
Zhang Y, Yang G, Zhang Y, Zhong Z, Hu H (2016) Influence of mechanical properties of sliding zone and water level changes on ancient landslide stability and its reinforcement measures. Rock Soil Mech 37(supp):43–52 (in Chinese)