摘要
皖南某高速路高边坡地质条件复杂,从坡中部至坡顶处均出现明显的倾倒变形迹象,并在边坡左侧发生过垮塌。通过对该边坡的地层岩性、岩体结构和边坡开挖等因素的分析研究,阐述了其变形机理,揭示了其弯曲-倾倒和滑移复合的变形破坏模式。这一变形机理的产生是由于原始地形较陡和坡体强烈卸荷,在开挖的触发下引起上部陡倾岩体向坡外弯曲变形,沿顺坡向结构面滑移拉裂。采用二维有限元数值模拟,分析了这类边坡在开挖过程中的应力和变形的特征及其变化规律,以验证上述的破坏机理模型。
The geological condition of the high rock slope on one expressway in the south of Anhui is very complicated. There appears evidently the toppling deformation from the middle part to the higher part of the slope, and collapses took place on the left part a few times. Through studying lots of factors, such as different substantial components of slope, character of geological structure, excavation etc. , this paper illuminates the mechanism of deformation on this high rock slope reveals that the model of deformation and destruction of this kind of anti inclined slope is the crooked-toppling going with sliding. It is demonstrated that the deformation of this slope is always initial cliffy terrain and unloaded in slope, then it is trigged by excavation leading to upper slope. rock layer; finally, the tensile Besides, two-dimensio field and displacement Key words, high rock during nal finit the exc fracture of sliding appears e element calculation is use avation and to demonstrate along discontinuities initiated by the toppling of the paralleling with d to analyze the regularities of stress the mechanism of this deformation.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第6期551-556,共6页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家自然科学基金重点资助项目(90102002)
关键词
高边坡
变形机理
弯曲-倾倒
稳定性
slope
mechanism of deformation
erooked-toppling
stability
