注浆加固对顺层边坡力学特征的影响

利用FLAC3D数值计算软件建立顺层边坡的计算模型,分析注浆加固前后岩土体应力、变形响应.研究结果表明:当坡体结构面注浆后,边坡中的位移和应力云图变得较均匀,在边坡中无明显的位移或者应力突变现象,有利于边坡的稳定,但是,由于注浆加固区域的有限性,导致边坡的整体位移仍较大；计算观察点动态位移能够表征注浆加固前后边坡各部位在开挖过程中的变形响应,以及潜在滑移面剪出口位置；通过注浆加固后,边坡的拉剪塑性区明显减少,注浆能够较好改善岩体自身性能,提高其承担拉伸和剪切应力的能力.

Influence of grouting on the mechanical characteristic of stratified rock slope

Numerical calculation model was founded for stratified rock slope by numerical calculation program FLAC3D software,and the stress and deformation response of the rock mass before and after grouting reinforcement were analyzed.The analysis results show that,after grouting,the displacement and stress contour are more smooth,and there does not exist no stress and displacement mutation,which is good for the slope stability.But due to the limitation area of grouting,the whole displacement of the slope is still very large.The dynamic displacement can reflect the deformation response of slope during excavation in the state before and after grouting,as well as the shear location of potential slip plane.After grouting,the tensile and shear plastic zones of the slope are reduced greatly,which shows that grouting can improve the mechanical characteristics of the rock mass,and can improve the capacity to resist the tensile and shear stress.