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通过分析承压型预应力抗浮锚杆在施工、使用阶段的应力变化,结合相关规范要求与工程实例,对承压型预应力抗浮锚杆的设计原则、设计方法进行探讨,概括、总结了此类锚杆设计计算的相关内容:不仅需对使用阶段锚杆的极限抗拔承载力、预应力筋受拉承载力、承载体局压区承载力等进行验算,尚应对施工阶段进行校核。同时,提出了锚杆顶部开裂控制计算的相关原则与验算方法,可供设计人员参考。对承压型预应力抗浮锚杆设计中存在的配筋量与开裂控制、施工阶段荷载效应、锚固体强度的确定等问题进行了讨论,为总结、完善此类锚杆的设计提出了思路。
Based on the analysis of the stress changes of the prestressed anti-floating anchor rod under construction and the use phase, the design principles and design methods of the prestressed anti-floating anchor rod under pressure are discussed based on the relevant specifications and engineering examples The relevant content of the design and calculation of such bolts: Not only the ultimate pull-out capacity of the anchor during the use phase, the prestressing tendon tensile bearing capacity, bearing body bearing pressure zone bearing capacity checking, the construction phase should be carried out school nuclear. At the same time, the principle and checking method of crack control calculation for roof top are proposed, which can be used for reference by designers. The existing problems of reinforcement and cracking control in design of prestressed anti-floating anchor bar under pressure, the load effect at construction stage and the determination of anchorage strength are discussed. In order to summarize and perfect the design of such anchors, .