岩土力学2012，Vol.33Issue(10)：2967-2972,6.
不同环剪方式下滑带土残余强度试验研究
Study of residual strength of slide zone soil under different ring-shear tests
摘要
Abstract
Slide zone soil of Huangtupo landslide is studied in detail as a typical example in the Three Gorges Reservoir. Three types of shear methods, including single-stage shearing, pre-shearing and multi-stage shearing, are conducted to investigate the residual strength of slide zone soil by employing ring-shear apparatus. It is conducted that the formation of shear band of slide zone soil is relevant with the shear displacement; the residual strength increases with the increasing of effective normal stress. For slip soil sample with a pre-existing shear band, residual shear strength can be soon and easily reached; initial dilatancy phase, contraction phase due to grain migration and constant contraction phase make up shear settlement curves of different ring-shear tests and the changing trend of shear stress in each stage is different. The residual strengths obtained from pre-shearing test and multi-stage test are larger than the actual value; the single stage shearing should be the preferred approach to acquire residual strength of slide zone soil.关键词
环剪试验/残余强度/滑带土/黄土坡滑坡Key words
ring-shear test/ residual strength/ slide zone soil/ Huangtupo landslide分类
建筑与水利引用本文复制引用
王顺,项伟,崔德山,杨金,黄旋..不同环剪方式下滑带土残余强度试验研究[J].岩土力学,2012,33(10):2967-2972,6.基金项目
国家自然科学基金(No.41272308) （No.41272308）
国家自然科学基金(No.41002102). （No.41002102）
