Occurrence of catastrophic landslides in the Wenchuan 8.0 earthquake zone
The catastrophic landslides are mainly occurred along the Longmenshan seicmic tectonic belt. The landslides could be descrided as the four acts: throwing, crashing, furrowing and air-layer lubricating. Throwing effect was obvious because the vertical acceleration was greater than horizontal acceleration within the main seismic fault zone and the long duration of ground motion led to the vibration expanding in rockmass. The upper thrown rockmass was crashed down a steep slope that commonly generated rockmass fragmentation and a stream of broken debris. Under the furrowing effect, the secondary rockslide was triggered on the lower slope which supplied enough grain sources for the stream of debris. Lots of cases show a mass of the crashing blocks rapidly long runout flows down lubricated on the air in lower valley that is turbidly flowed downwards, or in extensive flat land is compressed as the lamellar flow which can uplift the mass.
Yueping YIN Wanmo ZHENG Xiaochun LI Ping SUN Bin LI
China Geologic Survey,Beijing,100037,China Chengdu Center,China Geologic Survey,Chengdu,China China Geologic Survey,Beijing,100037,Beijing,China Institute ofGeo-mechanics,CGS,Beijing,100081,China Institute of Geo-mechanics,CGS,Beijing,100081,China
国际会议
International Symposium and The 7th Asian Regional Conference of IAEG(国际工程地质与环境协会年会暨第七届亚洲工程地质会议)
成都
英文
80-99
2009-09-09（万方平台首次上网日期，不代表论文的发表时间）