预应力锚索抗滑桩优化设计及应用

Optimization design and application of prestressed achor friction piles

为研究预应力锚索抗滑桩的设计计算过程和对受力分布的优化,基于弹性地基梁理论,按照桩与锚索变形协调的原理,分阶段进行锚索抗滑桩的变形与内力的计算分析。结合锚索抗滑桩设计计算实例,编制程序验证该设计计算理论的合理性。从设置锚索前后桩身内力与变位计算结果可以看出:在其他条件相同的情况下,锚索桩与普通桩相比,桩身内力分布更加均衡,受力状态得到明显的改善。在这种情况下,桩的截面尺寸与锚固长度大大减少,从而达到减少工程量和降低工程造价的目的。

In order to study the process of designing and calculating prestressed anchor friction piles, based on the elastic foundation beam theory, anchor friction pile deformation and internal force calculation, the analysis were carried out in stages in accordance with the principle of coordination of the pile and anchor deformation. Combined with calculation examples of anchor friction pile, programs were prepared to verify the rationality of the design and calculations. From the internal forces and deformation of the pile before and after setting anchor ca- ble, it can be found that ： when other conditions are the same, the internal force distribution of the anchor pile is more balance and the stress state gets maked improvement compared with the ordinary pile. In this case, the cross - section dimensions and anchorage length of the pile are greatly reduced, and the amount of works and the pro- ject cost are reduced.