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《Journal of Earthquake Engineering and Engineering Vibration》 2011-02
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Liquefaction characteristic analysis in Deyang region in the Wenchuan earthquake

WANG Weiming,YUAN Xiaoming,CHEN Longwei,CAO Zhenzhong,SUN Rui,DONG Lin(Institute of Engineering Mechanics,CEA,Harbin 150080,China)  
In Wenchuan earthquake,liquefaction phenomena occurred in eight major regions,in which liquefaction and relevant damage in Deyang region were the most significant.Through field investigation and engineering geological data analysis,liquefaction characteristics in Deyang region are:(1) Liquefaction zones(belts) were mainly located in Mianzhu,Shifang and Deyang cities,and the most serious was in Mianzhu;(2) Liquefaction was observed in the regions of intensities Ⅶ,Ⅷ,Ⅸ,but mainly concentrated in intensity Ⅷ;(3) Heights of liquefaction water-jet were centimeters to meters,and the highest was more than 10m;(4) The ejected materials in liquefied sites basically covered all soil types,nearly 50% of fine sand followed by 16% of gravel;(5) 80% of the liquefaction zones were associated with cracks which caused houses tilting,sinking,cracking and even collapse even though the houses were built with ring beams and structural columns;(6) The strata contain thick gravel and cobble layers,and thin sand layers contain gravel.Therefore the actual liquefaction is gravel soil.
【Fund】: 中国地震局工程力学研究所基本科研业务费专项(2010B01);; 国家科技部国际合作项目(2009DFA71720);; 公益性地震行业科研专项(200708001);; 国家自然科学基金重大研究计划(90715017)
【CateGory Index】: TU392.1
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