反倾岩石边坡变形破坏试验及有限元分析

根据相似理论建立地质力学模型,研究反倾层状边坡岩体的变形破坏机制。介绍了模型试验的设计和过程,研究了原型边坡的变形破坏机制和岩层倾角对边坡稳定性的影响。同时进行了Ansys模拟计算。通过比较这两种研究方法的结果,发现反倾层状边坡岩体的变形机制为倾倒变形,破坏模式为弯折破坏;破坏首先在坡顶产生,边坡变形加速的过程是在开挖结束一段时间后才出现;岩层倾角的变化对反倾边坡的变形影响不敏感,但对边坡变形加速持续时间的长短有较大的影响,岩层倾角越小,变形加速所持续的时间越长。

Test Study and Finite Element Analysis on Deformation and Damage of Anti-dip Rock Slop

Based on simulation theory,a geologic mechanics model is established and used for research on deformation and damage mechanism of anti-dip layered rock slop.The paper introduces the design and process of the simulation experiment,and researches the deformation and damage mechanism of archetype slop as well as the influence of strata inclination on its stability,at the same time,carries out the analog computation of its stability by use of Ansys.After comparing the results obtained by two research methods,it is found that the deformation of anti-dip layered slop is collapse and its damage is disjunction,the damage firstly comes into being at the tip of slop,the accelerated deformation of slop rock occurs in some time after the excavation has been finished,the change of strata inclination has no influence upon the deformation of anti-dip rock slop,but has big inclination upon the duration of accelerated deformation of the slop rock,strata inclination is bigger and the duration is longer.