卸荷条件下锚杆对岩体变形参数的影响

Influence of Anchor Bar on Deformation Parameters of Unloading Rock Mass

采用有限元分析软件ADINA对含节理的岩体模型进行二维的有限元数值计算,岩体在加载和卸载条件下,其力学特性有本质的区别.重点分析了在卸荷条件下,锚杆的数量和倾角的变化对岩体变形参数如变形模量和泊松比的影响,揭示了岩体变形参数变化趋势并说明了产生变化的原因.

Anchor bar is one of the supporting measures commonly used in geotechnical engineering. The finite element analysis software ADINA is applied to make a planar finite element numerical calculation of jointed rock mass. Under loading and unloading, the rock mass has different mechanical characters. It is analyzed that the rock＇s deformation parameters such as Young＇s modulus and Poisson＇s ratio are influenced by the change of the number and obliquity of anchor bars. The change trend of rocks deformation parameters is concluded and the reasons that cause the change are explained.