高桩码头岸坡设计研究

摘要

针对高桩码头岸坡设计中的稳定性问题,对镇江港某高桩码头岸坡建立有限元模型进行分析.在高桩码头的岸坡设计中,通常没有考虑桩基的抗滑作用,所以同时建立了无桩和有桩的码头岸坡模型,进而对比分析高桩码头中桩基对岸坡稳定性的作用,从而为高桩码头岸坡设计提供依据.土体的强度准则选用的是与Mohr-Coulomb匹配的Dracker-Prager准则,运用有限元强度折减法进行计算.研究结果表明:高桩码头中桩基的存在对岸坡稳定性能起到一定的抗滑作用,但是岸坡设计时,桩对岸坡抗滑作用必须降低到规范以下,否则桩基会因为承受过大的水平推力而发生破坏.%Aiming at the problems of stability of slope design of high-piled wharf,a finite element model of a high piled wharf slope in Zhenjiang is established in the paper.Because the slope design in high pile wharf pile foundation usually does not the effect of anti-slide,we established the model without pile and pier pile,and then analyzed the effect of the piles on the stability of the bank slope in high pile wharf.The selection of soil strength criterion is based on Mohr-Coulomb matching Drucker-Prager criterion,and the calcutation was performed by the strength reduction finite element method.The results show that the piles of high pile wharf slope to stability plays a certain role in anti-slide,but the effect of anti-slide pile must be reduced to below the standard,or else the pile will bear big horizontal thrust that leads to destruction.