Ontology type: schema:Chapter
2013
AUTHORSTonglu Li , Jifei Zhao , Ping Li , Fawu Wang
ABSTRACTRapid loess flowslides induced by irrigation often occur in the loess irrigation area, which have resulted in serious damages to farmlands, residential houses and loss of lives. A typical case of the Gaolou flowslide in Guanzhong irrigation area, Shaanxi Province of China was investigated. Laboratory tests suggest that the loess flowslide has a loose structure and that the saturated moisture content is higher than the liquid limit. As the loess slope starts to fail, the saturated loess of the sliding zone quickly fluidizes and then flows on the relative dry-hard path because the loess structure is damaged by the shear force to produce a high excess pore pressure in the lower portion of the displaced mass, while negative pore pressure is produced between the displaced mass and the ground surface because of pore pressure dissipation on the dry ground. So the shearing zone is within the lower portion of the displaced mass other than on the ground surface, which makes part of the displaced mass cohere on the ground as seen at the site. The triaxial tests for the loess specimens suggest that fluidization occurs at the source area in the beginning and maintains in the moving process, which produces a quick and long run-out flow. The modified Sassa K’s simulation model for landslide motion is applied to simulate the motion scenarios of this case. More... »
PAGES421-433
Progress of Geo-Disaster Mitigation Technology in Asia
ISBN
978-3-642-29106-7
978-3-642-29107-4
http://scigraph.springernature.com/pub.10.1007/978-3-642-29107-4_24
DOIhttp://dx.doi.org/10.1007/978-3-642-29107-4_24
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