摘要
Abstract
[Purposes]As a commonly used form of support,the bearing deformation characteristics of anchor rods have a significant impact on engineering safety.As a new type of anchor rod,tension-compression anchor can significantly enhance the support capacity of anchor rods.The key factors affecting the bearing capacity of tension-compression anchors were explored by studying their bearing deformation characteristics.[Methods]Based on the mechanical properties of the anchorage interface,the load transfer mechanism of tension-compression anchor was studied.According to the displacement consistency of the tension and pressure segments at the bearing plate,an iterative calculation method was used to analyze the distribution laws of axial force,shear stress,and displacement in the anchorage segment.[Findings]The shear stress,axial force,and displacement on both sides of the bearing plate follow the distribution characteristics and evolution laws of tension-compression anchor,respectively.Under specific design conditions,when the ratio of the pressure segment to the tension segment is 2,the relative displacement of the anchorage segment is minimal,and the average shear stress and ultimate bearing capacity of the anchor rods reach their maximal values.[Conclusions]The relative displacement of the anchorage segment is mainly controlled by the load,the mechanical properties of the anchorage interface,and the internal force coordination mechanism of the anchorage segment.In the design of anchor rods,reasonable material selection and structural design can be used to reduce the relative displacement of the anchorage segment,so as to better utilize the mechanical properties of the anchorage interface and improve the bearing capacity of the anchor rod.关键词
锚固界面/拉压型锚杆/荷载传递/刚度/锚杆结构/相对位移Key words
anchorage interface/tension-compression anchor/load transfer/stiffness/anchor rod structure/relative displacement分类
交通运输
