工程地质学报2011，Vol.19Issue(2)：152-161,10.
2011年3月10日盈江5.8级地震诱发砂土液化灾害特征研究
STUDY OF SAND LIQUEFACTION HAZARD FEATURES INDUCED BY YINGJIANG Ms 5.8 EARTHQUAKE ON MARCH 10, 2011
摘要
Abstract
On March 10, 2011, a MsS. 8 earthquake, focal depth 10kin,struck Yingjiang county locating on Dehong Autonomous Prefecture of Yunnan province closed to Sino-Burna border, induced 25 persons killed, 250 injured, about 130 thousand people affected, many institutions (building)damaged, extensive liquefaction developed, about 19km Yingjiang embankment cracked. Such greater secondary disasters trigged by a Ms 5.8 earthquake is rare in recent seismic events. 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 agencies. (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. The late Pleistocene as the second terrace of Yingjiang is not only high altitude, better flood resistance capacity, but also strong engineering geological conditions for non-liquefaction, so where is the better place as the planning development area of the local towns.关键词
盈江地震/地震迁移/大盈江断裂/砂土液化/同震破坏Key words
Yingjiang earthquake/ Earthquake migration/ Dayingjing fault/ Sand liquefaction/ Co-seismic damage分类
天文与地球科学引用本文复制引用
姚鑫,张加桂,张永双,杨波,余凯..2011年3月10日盈江5.8级地震诱发砂土液化灾害特征研究[J].工程地质学报,2011,19(2):152-161,10.基金项目
自然科学基金项目(41072269),中国地质调查局工作项目(1212010914025 1212011014035). （41072269）
