Dynamic analysis of the stabilized Wangjiayan landslide in the Wenchuan Ms 8.0 earthquake and aftershocks

详细信息    查看全文

• 作者：Yueping Yin ; Bin Li ; Wenpei Wang
• 关键词：Landslide ; Wenchuan earthquake ; Aftershock ; Dynamic analysis ; Existing stabilization work
• 刊名：Landslides
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：12
• 期：3
• 页码：537-547
• 全文大小：4,449 KB
• 参考文献：Cui FP, Hu RL, Yin YP (2010) Discrete element analysis of collapsing and sliding response of slope triggered by time difference coupling effects of P and S seismic waves-taking Tangjiashan landslide in Beichuan county for example. Chin J Rock Mech Eng 29(2):319-27
  Dawson EM, Roth WH, Drescher A (1999) Slope stability analysis by strength reduction. Geotechnique 49(6):835-40View Article
  Griffith DV, Lane PA (1999) Slope stability analysis by finite elements. Geotechnique 49(3):387-03View Article
  Itasca Consulting Group Inc. (2005) FLAC (fast Lagrange analysis of continua) slope user’s guide (Version 5.0). Minneapolis, Minnesota
  Matsui T, San KC (1992) Finite element slope stability analysis by shear strength reduction technique. Soils Found 32(1):59-0View Article
  Sun P, Yin YP, Wu SR, Chen LW (2012) Does vertical seismic force play an important role for the failure mechanism of rock avalanches? A case study of rock avalanches triggered by the Wenchuan Ms8.0 earthquake of May 12, 2008, Sichuan, China. Environ Earth Sci 66(5):1285-293View Article
  Wang FW, Cheng QG, Highland L, Miyajima M, Wang HB, Yan CG (2009) Preliminary investigation of some large landslides triggered by the 2008 Wenchuan Ms8.0 earthquake, Sichuan province, China. Landslides 6(1):47-4View Article
  Wang FH, Wang YS, Sun G, Xu HB, Luo QL, Li YL (2011) Study on slope response under seismic loading: taking the Dongshan-Shiziliang profile in Qingchuan, Sichuan as an example. Geosciences 25(1):142-50
  Wang YS, Luo YH, Wang FH, Wang D, Ma X, Li S, Deng X (2012) Slope seismic response monitoring on the aftershocks of the Wenchuan Ms8.0 earthquake in the Mianzhu section. J Mt Sci 9(4):523-28View Article
  Yin YP (2014) Vertical acceleration effect on landsides triggered by the Wenchuan earthquake, China. Environ Earth Sci 71(11):4703-714
  Yin YP, Wang FW, Sun P (2009) Landslide hazards triggered by the 2008 Wenchuan Ms8.0 earthquake, Sichuan, China. Landslides 6(2):139-52View Article
  Yin YP, Zheng WM, Li XC, Sun P, Li B (2010) Catastrophic landslides associated with the Wenchuan Ms8.0 earthquake. Bull Eng Geol Environ 70(1):15-2View Article
  Yu HY, Wang D, Yang YQ, Xie QC, Jiang WX, Zhou BF (2009) The preliminary analysis of strong ground motion records from the Wenchuan Ms8.0 earthquake. J Earthq Eng Eng Vib 29(1):1-3
  Zhang M, Yin YP, Wu SR, Zhang YS, Han JL (2011) Dynamics of the Niumiangou creek rock avalanche triggered by 2008 May 12 Wenchuan Ms8.0 earthquake, Sichuan, China. Landslides 8(3):363-71View Article
  
• 作者单位：Yueping Yin (1)
  Bin Li (2)
  Wenpei Wang (1)
  
  1. China Institute of Geo-environment Monitoring, CGS, Beijing, 100081, China
  2. Institute of Geomechanics, China Geological Survey, South Road, Mingzuxueyuan, Beijing, 100081, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Applied Geosciences
  Geography
  Agriculture
  Civil Engineering
  
• 出版者：Springer Berlin Heidelberg
• ISSN：1612-5118

文摘

This paper discusses the effect of the May 12, 2008 Wenchuan earthquake on a landslide where stabilization work had taken place and compares the results to sites without stabilization. Contours of shear strain increment and displacement values obtained using a FLAC3D simulation show that the Wangjiayan landslide, which had stabilization work, was stable before the Wenchuan earthquake. Simulations using input strong motion accelerations from the main shock recorded at Qingping station, within the main seismic fault zone, suggest a shear strain increment about 3,000 times more than it was before the main shock. Although the stability of the stabilized landslide decreased during the earthquake, the displacement values were very small. Modeled displacements suggest that the piles played a major role in keeping the slope from sliding. The anti-slide piles were subjected to high shaking acceleration. The strong ground motion records for a time range of 10 to 30?s show that the piles generally experienced accelerations in the range from 0.0 to 3.0?g, with a few spikes of about 5.0?g. Special observation stations were set up to monitor the slope motion at Qingchuan town, 150?km far from the Wangjiayan landslide, along the main central seismic fault zone, after the Wenchuan earthquake. The variation in acceleration with time and the FOS versus time of the Wangjiayan landslide were investigated using these acceleration records of the aftershocks as input data. The aftershock accelerations did not decrease the stability of the Wangjiayan landslide, but an amplification effect on the acceleration of the slope at different elevations was illustrated.