论文部分内容阅读
针对基桩竖向承载力自锚法测试体系中桩底嵌岩压力型锚杆的受力特点,基于Kelvin问题的弹性位移解,并结合锚固体-岩石作用的剪胀机理,推导了压力型锚杆应力分布的弹性解。基于所获得的解答,分析了桩底嵌岩锚杆锚固段应力沿锚固长度的分布规律,并分析了各种岩土参数变化对锚固段剪应力分布的影响。结果表明:桩底嵌岩锚杆锚固段上的正应力随着距承载板距离的增大而减小,剪应力随着距承载板距离的增大先增大后减小,峰值剪应力随着剪胀角的增大而增大,随着锚固体泊松比的增大而减小。
Aiming at the mechanical characteristics of the rockfill under pressure rock bolt in the test system of self-anchored vertical bearing capacity of foundation pile, based on the elastic displacement solution of Kelvin’s problem and the anchoring-rock dilatancy mechanism, Elastic Solution of Stress Distribution in Anchor. Based on the obtained solutions, the stress distribution along the anchorage length of the anchored rock - fill anchors at the bottom of the pile is analyzed, and the influence of various geotechnical parameters on the shear stress distribution in the anchored sections is analyzed. The results show that the normal stress on the anchored section of rockfill embedded in rock bolts decreases with the distance from the bearing plate, and the shear stress first increases and then decreases with the increase of the distance from the bearing plate. The peak shear stresses The dilatancy angle increases with the increase, with the anchor Poisson’s ratio decreases.