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预应力锚索(结构见图1)是通过对埋设在地层中的杆体施加预应力后,依赖杆体与周围地层的抗剪强度传递结构物(如框架梁、地梁等)拉力,以保持结构物和岩土体的稳定或使地层自身得到加固。预应力锚索设计指标主要包括锚索的配置,锚索锚固深度和自由(张拉)段长度的确定,锚索预应力筋的材料和防腐设计以及锚固体的设计等,本文以京福高速公路福州段
Prestressed anchor cable (see Figure 1) is obtained by prestressing the rod buried in the formation, relying on the shear strength of the rod body and the surrounding strata (such as frame beams, ground beams, etc.) tension to maintain the structure Stabilization of objects and rock and soil or reinforcement of the formation itself. The design indexes of prestressed anchor cable mainly include the configuration of anchor cable, the anchorage depth of anchorage cable and the determination of the length of free (tension) section, the material and anticorrosive design of anchorage cable prestressing tendons and the design of anchoring body. In this paper, Fuzhou section of the road