- 责任者：Yao Xin (Key Laboratory of Neotectonic Movement ; Geohazards ; MLR ; Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China） ; Zhang Jiagui
- 刊名：Journal of Engineering Geology
- 出版年：2011
- 卷期：19（2）
- 关键词：砂土液化 ; sand liquefaction ; 震灾 ; seismic hazard ; 云南 ; Yunnan Province
- 页码：p.152-161
- 图表：6 illus., 12 refs.
- 分类号：1800
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
By analyzing the geological background of the earthquake and investigating geological hazards, this paper obtained an initial understanding of geo-hazards: 1) this earthquake is the results of continue enhance of Yingjiang scale 4 earthquake swarm beginning in 2011; in recent years, seismic swarm in Yingjiang region present a gradual migration from north to south along Sudian Fault; this earthquake is a continuation of this trend; the main shock and aftershocks show that Yingjing co-seismic rupture is a conjugate rupture between Shudian Fault and Dayingjing Fault; 2)Sand liquefaction is one of main reasons that this earthquake induced so severe loss. Sand liquefaction products lots of secondary geo-hazard phenomenon, sand and water blasting to the surface, sliding along the lateral ramp, ground cracking and subsidence, et al., which results in greater damages to houses, river banks roads, water facilities and electric poles and other agencie; and 3)Sand liquefaction are mainly developed in Dayingjiang Holocene alluvial deposits of fine sand, serious liquefied area is the Dayingjiang old river channel, construction (building) damaged area and degree is better accord with the extent and degree of liquefaction.