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为了研究层状地基中锚杆受力变形特性,引入4种锚固界面荷载传递模型,给出了其统一数学表达式,并基于荷载传递法和传递矩阵法,选取适合各土层的锚固界面荷载传递模型,推导出了锚固体周边土体处于不同受力状态时的锚杆位移、轴力、剪应力计算式,并以工程实例检验了该方法的可行性以及荷载传递模型选取的合理性;讨论了荷载传递模型、土层相对层序对层状地基中锚杆受力变形特性的影响。研究结果表明:土层力学性质及其层序对锚杆影响较大,在对层状地基中锚杆设计计算时,各土层应该选用适合其力学性质的荷载传递模型,否则将直接影响到对锚杆承载力以及位移的准确估计。
In order to study the force and deformation characteristics of anchors in layered soils, four kinds of load transfer models are introduced and their uniform mathematical expressions are given. Based on the load transfer method and transfer matrix method, the anchoring interface loads The model of bolt displacement, axial force and shear stress is deduced when the soil around the anchor is in different stress state. The feasibility of the method and the rationality of the load transfer model are verified by engineering examples. The load transfer model and the influence of the relative sequence of soil layers on the force and deformation characteristics of rock bolts in layered soils are discussed. The results show that: the mechanical properties of soil layer and its sequence have a great influence on the bolt. When designing and calculating the bolt in the layered soil, the load transfer model suitable for its mechanical properties should be selected in each soil layer, otherwise it will directly affect Accurate Estimation of Anchor Capacity and Displacement.