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预应力锚杆柔性支护已逐渐在深基坑工程中得到广泛应用,其主要构件之一锚下承载结构的破坏模式与设计计算尚不明确。结合工程实例对锚下承载结构的各个组件进行详细阐述,然后通过有限元模拟计算。针对不同的预加应力,首次对槽钢、垫板、加劲肋钢筋、喷射混凝土等构件之间的选型尺寸进行了探讨,提出了各个构件之间合理的匹配关系,为相关人员在设计锚下承载结构时提供参考。
The prestressed anchor flexible support has gradually been widely used in deep foundation pit engineering. The failure mode and design calculation of anchor structure under one of its main components is not yet clear. Combined with engineering examples, the various components of the anchor-bearing structure are elaborated and then calculated by finite element simulation. According to the different prestressing stress, the selection and dimensioning of the components such as channel steel, backing plate, stiffened steel bar and shotcrete are discussed for the first time, and reasonable matching relations among the various components are put forward. Under the bearing structure to provide reference.