边载作用下高桩码头桩基承载力性能及加固研究

Research on load capacity and strengthening of piles in long-piled wharf subjected to side loads

码头接岸结构中的桩基础,经常受各种形式的边载作用。边载效应会导致桩基承受额外的附加力,还会产生桩身弯矩增大桩的水平位移,这些都可能导致桩体材料因为强度不足局部破坏或者结构局部失稳破坏。利用三维非线性有限元方法,研究了承受边载作用的排桩的特性,揭示了桩身侧摩阻力、桩身弯矩变化的规律。另外,基于工程实例通过合理经济地置换加固软弱土层,研究了在改变土层性质的情况下排桩的承载特性。分别对桩身侧摩阻力、桩身弯矩进行了分析,结果表明,置换加固土层可以达到有效的作用。

For piles in link-bank structure of wharf,often subject to multiform side loads.The loads may cause the pile bear additional stress and bending moment,which may be large enough to overstress the pile’s material causing fractures or perhaps structural failure of the pile.Three-dimensional nonlinear finite element was developed to study the behavior of piles subjected to side loads,and the varying law of the skin friction and moment of this kind of pile was posted.Besides,based on the engineering project,the bearing characteristic of row piles was studied under the circumstances of changing the soil nature by replacement to reinforce the soft clay reasonable and economically.Based on the results the skin friction and moment of piles were analyzed respectively,which indicated that the soil replacement for reinforcement would have a good effect.