Characteristics of the Post-Earthquake Rockfalls of Highway Slopes in Wenchuan-Earthquake-Stricken Areas

详细信息   

• 责任者：Su Shengrui (Department of Geological Engineering ; Chang’an University ; Xi’an 710054 ; China) ; Li Song
• 刊名：Journal of Mountain Research
• 出版年：2012
• 卷期：30(3)
• 关键词：崩塌 ; avalanches ; 四川 ; Sichuan Province
• 页码：p.321-327
• 图表：3 illus., 13 refs.
• 分类号：1800
• issnNo：ISSN1008-2786
• isbnNo：CN51-1516/P

摘要

///Based on site investigation of the slope rockfall in the highway S303 from Wolong to Yingxiu in Sichuan Province after Wenchuan earthquake, through the analysis of the space distribution, the relationship between rockfall and composilion, lithology, and gradient, height, configuration and direction of slopes as well as the formation mechanism of the rock- falls, the development rules of the post-earthquake rockfalls are obtained: 1 ） distribution rule of rockfall after the earthquake is the same with that during the earthquake; 2）according to the material composi- tion of slope, most rockfalls are rock slope rockfalls, and then are rock-soil slope;  3）the gradient of rockfall slope is between 36° ~ 85 °, mostly between 41°- 60°, that is to say, post-earthquake rockfall occurs easily on slopes with gradient above 40°; 4 ）post-earthquake rockfall occurs easily on slope with height above 150 m and there is an obvious difference in slope height between the highway from Yingxiu to Genda and from Genda to Wolong; 5 ）there is a remarkable difference in the number of rockfall between sunny and cloudy slope; and 6 ）the formation mechanisms of the post-earthquake rockfall are primarily sliding rockfall and dumping roekfall.