软土地基中桥台桩侧向位移的计算方法探讨

土的侧向荷载对桥台桩基的水平位移和弯曲变形具有重大影响,往往导致桥台桩身发生挠曲甚至破坏。通过总结侧向变形土体常见的位移模式,分析桥台桩的变形机制,在阐述不同模式下桩侧压力的产生机理及桩的几种破坏模式的基础上,提出桩土间相互作用力与桩土间相对位移的双曲线关系模型和理想弹塑性关系模型,可为相关研究提供参考。

Model of Interaction between Piled Bridge Abutments and Soils

The lateral loading derived from backfill earth pressure will induce bending moments and deflections in the piles. In several cases, it may lead to structural distress or failure of the piles or bridge structure. By analyzing the displacement mode of unstable soil and the deformation mechanism of passive pile, an elastic perfectly plastic model and a hyperbolic curve model about the behavior of piled bridge abutment against soil lateral movements are developed on the basis of the previous research. It is hoped to provide reference for relative research.