Characteristics of Flow Failures Triggered by Recent Earthquakes in China

In recent years, several strong earthquakes occurred in China, like the 2008 Wenchuan Earthquake, 2003 Bachu Earthquake, etc. These earthquakes triggered numerous flow failures, causing severe damage to buildings and infrastructure. In this paper, some general characteristics of flow failures triggered by these recent earthquakes are reviewed. Based on seismic data analysis and field investigation, a brief overview of typical liquefaction phenomena and their characteristics during recent large earthquakes in China is presented. It is manifested that liquefaction occurs mainly in the alluvial plain sediments with low groundwater levels. Some new phenomena, like liquefaction of gravelly soil and deep-level sandy soils, and re-liquefaction, should be paid enough attention in further study. Then, the paper outlines the spatial distribution characteristics of flowslides induced by earthquakes to provide a reference for seismic design and risk mitigation. The flowslide-prone areas are dip slopes opposing the propagation direction of seismic wave, which are mostly located along the surface rupture and near the epicenter, especially on the hanging wall of the fault. Lastly, the state of the post-earthquake investigation and evaluation method for flow failures in China is presented briefly. Field investigation and remote-sensing image interpretation play important roles in the data collection and evaluation of seismic geohazards after earthquakes.

[1]  Cai Xiaoguang.  PRELIMINARY RESEARCH ON LIQUEFACTION CHARACTERISTICS OF WENCHUAN 8.0 EARTHQUAKE , 2009 .

[2]  Miao Yu,et al.  Review of soil liquefaction characteristics during major earthquakes of the twenty-first century , 2013, Natural Hazards.

[3]  Ximiao Jiang,et al.  Field-observed phenomena of seismic liquefaction and subsidence during the 2008 Wenchuan earthquake in China , 2010 .

[4]  X. Yuan,et al.  Liquefaction macrophenomena in the great Wenchuan earthquake , 2009 .

[5]  Co-seismic strike-slip surface rupture and displacement produced by the 2010 MW 6.9 Yushu earthquake, China, and implications for Tibetan tectonics , 2011 .

[6]  Brendon A. Bradley,et al.  Soil Liquefaction Effects in the Central Business District during the February 2011 Christchurch Earthquake , 2011 .

[7]  Chong Xu,et al.  Landslides triggered by slipping-fault-generated earthquake on a plateau: an example of the 14 April 2010, Ms 7.1, Yushu, China earthquake , 2013, Landslides.

[8]  L. Weile.  DISTRIBUTION OF LARGE-SCALE LANDSLIDES INDUCED BY THE WENCHUAN EARTHQUAKE , 2010 .

[9]  Xiaoqing Chen,et al.  The Wenchuan Earthquake (May 12, 2008), Sichuan Province, China, and resulting geohazards , 2011 .

[10]  Weile Li,et al.  Analysis of the geo-hazards triggered by the 12 May 2008 Wenchuan Earthquake, China , 2009 .

[11]  Qiang Xu,et al.  Run-out analysis of flow-like landslides triggered by the Ms 8.0 2008 Wenchuan earthquake using smoothed particle hydrodynamics , 2012, Landslides.

[12]  Chong Xu,et al.  GIS-based support vector machine modeling of earthquake-triggered landslide susceptibility in the Jianjiang River watershed, China , 2012 .

[13]  Masahiro Chigira,et al.  Geological and geomorphological precursors of the Chiu-fen-erh-shan landslide triggered by the Chi-chi earthquake in central Taiwan , 2003 .

[14]  Ping Sun,et al.  Landslide hazards triggered by the 2008 Wenchuan earthquake, Sichuan, China , 2009 .

[15]  Wu Junfeng,et al.  STUDY OF FORMATION CONDITIONS AND TOSS MOTION PROGRAM OF HIGH LANDSLIDES INDUCED BY EARTHQUAKE , 2009 .

[16]  Wenjun Zheng,et al.  Lushan MS7.0 earthquake: A blind reserve-fault event , 2013 .

[17]  Chuan Tang,et al.  Rainfall-triggered debris flows following the Wenchuan earthquake , 2009 .

[18]  Hu Zheng,et al.  Computational fluid dynamics modeling of post-liquefaction soil flow using the volume of fluid method , 2012, Bulletin of Engineering Geology and the Environment.

[19]  Huang Run-qiu.  Analysis of characteristics of geological hazards by "4·20" Lushan earthquake in Sichuan,China , 2013 .

[20]  Giovanni B. Crosta,et al.  Small fast-moving flow-like landslides in volcanic deposits: The 2001 Las Colinas Landslide (El Salvador) , 2005 .

[21]  Qiang Xu,et al.  Rapid susceptibility mapping of co-seismic landslides triggered by the 2013 Lushan Earthquake using the regression model developed for the 2008 Wenchuan Earthquake , 2013, Journal of Mountain Science.

[22]  Huabin Wang,et al.  Preliminary investigation of some large landslides triggered by the 2008 Wenchuan earthquake, Sichuan Province, China , 2009 .

[23]  Hui Wang,et al.  Boundaries between Active‐Tectonic Blocks and Strong Earthquakes in China Mainland , 2005 .