软土地基桩基负摩阻力简化计算方法

负摩阻力的计算是桩基工程设计中最重要的问题之一。由于港口及配套工程大多处于港湾滩涂或吹填区域，土层中存在较厚的软弱层（如淤泥质土、淤泥等），场地内分布的软弱土层厚度大且大多尚未完成固结，因此设计中需要考虑负摩阻力及下拉荷载对桩基承载力的影响。目前，国内相关规范中虽然提出了桩基负摩阻力的计算公式，但规范相关条款却有待完善。基于国内外文献及工程实际，首先分析了软土地基中桩基负摩阻力产生的原因与危害，然后结合国内规范提出了桩基负摩阻力及下拉荷载的简化计算方法，最后总结了减少桩基负摩阻力的工程优化措施，并对以后的研究提出了展望。

Simplified calculation method for negative friction on piles in soft soil foundation

Calculation of negative friction is one of the most important problems in the design of pile foundation engineering.As ports and other ancillary works engineering mostly locate at the region of tideland and dredger fill sedimentation,soft soil layers such as sludge or mud soil which are thick and unconsolidated are widespread.Thus,it's necessary to take into account the influence of negative friction and drop-down loads on pile foundations.At present,although calculation methods of negative friction on pile...