水利水电技术2017，Vol.48Issue(12)：181-187,7.DOI:10.13928/j.cnki.wrahe.2017.12.029
西域砾岩高边坡坡脚侵蚀的破坏机理研究
Study on failure mechanism of toe erosion of high Xiyu conglomerate slope
摘要
Abstract
As Xiyu conglomerate is often mixed up with mudstone alternating layers,the instability failure of the slope is prone to be caused when the mudstone is softened by water.An experimental study of numerical simulation on the mechanism of the softened failure of the toe of high conglomerate slope is made herein with FLAC3D by taking the failure mechanism as the objective;in which the sensitivities of the factors of the slope degree,height,cohesion and angle of internal friction of the slope are respectively analyzed and calculated with extreme difference analysis method through nine sets of experiment schemes in accordance with the orthogonal experiment design principle.The result shows that the failure of the toe of high conglomerate slope commonly consists of the upper tensile failure zone and the lower shear failure zone of the potential failure plane,which forms a broken line sliding plane with the angle of 45° to the toe.Among the four factors mentioned above,the impact from the softening of soft rock on the stability of the slope due to the variation of the cohesion is significant and the impacts from the both the slope degree and the angle of internal friction are secondary,while both of them are on a same level.However,the impact from the slope height is relatively weak.关键词
西域砾岩/高边坡/泥岩软化/正交试验Key words
Xiyu conglomerate/high slope/softening of mudstone/orthogonal experiment分类
建筑与水利引用本文复制引用
黎康平,王玉杰,李守义,林兴超,孙平,李文新..西域砾岩高边坡坡脚侵蚀的破坏机理研究[J].水利水电技术,2017,48(12):181-187,7.基金项目
中国水科院人才基金项目(GE0145B542017) （GE0145B542017）
国家自然科学基金项目(51579208) （51579208）
