【摘要】 通过分析有自由段充填注浆的预应力锚索的动态工况特征和边界条件,基于锚注体-围岩界面径向与轴向变形协调条件,建立了等效介质模型.采用柱状空间内的Mindlin积分解和轴对称径向膨胀力Mindlin解,导出了内锚固段轴力分布和预应力作用下的荷载-变位关系方程.结合原位试验结果,分析、比较了荷载-变位特征曲线及轴力分布形态.更多还原

【Abstract】 Based on the compatibility conditions of axial and radial deformations of anchor-rockinterface, an equivalent medium model was established by analyzing the dynamic load character andboundary conditions of a prestressed anchor cable with a free part without injecting cement paste. Theaxial force distribution and the mathematical expression to describe the relation between the deformationand pretension of a prestressed anchor cable were derived by using the Mindlin integral solution incolumn space and the Mindlin solution for axisymmetric radial dilation load. In addition, thecharacteristic curve of load-deformation and the distribution modality of axial stress were compared withfield testing results.更多还原