软弱土层对超长摩擦桩承载性状的影响  

Effects of soft Soil on Behavior of Ultra-lengthy Friction Pile

作　　者：徐闪 张齐兴[2] 徐志峰[3] 

机构地区：[1]江苏省交通厅苏北航务管理处,江苏淮安223002 [2]河海大学农业工程学院,江苏南京210098 [3]南京水利科学研究院,江苏南京210029

出　　处：《水电能源科学》2008年第4期153-156,共4页Water Resources and Power

摘　　要：以苏通大桥主桥索塔地基中的中粗砾砂土和软粘土为地基土,用三维非线性有限元方法研究了软弱土层的埋深、厚度以及软弱下卧层等对超长摩擦桩承载性状的影响。计算结果表明,超长摩擦桩的承载力随桩周软弱土层的埋深、厚度的增大均呈线性减小,随软弱下卧层埋深的增大而增大,桩侧阻力的分布随软弱土层埋深、厚度的变化而变化。Based on three-dimensional finite element method （3D FEM）, the effects of embedded depth and thickness of the soft foundation soil on the behavior of ultra-lengthy friction pile are investigated. The medium-coarse gravel sand and soft clay in the foundation of Sutong Large Bridge are used in the study, The calculation results indicate that the bearing capacity of the ultra-lengthy friction pile is linearly reducing with increasing the embedded depth or thickness of the soft foundation soil around pile, and increasing a little with increasing the distance from the soft foundation soil below the pile to the bottom of the pile. The distributions of the shaft load and side resistance along the depth are changed with changing the embedded depth and/or thickness of the soft foundation soil around the pile.

关 键 词：超长摩擦桩 软弱土层 承载性状 

分 类 号：TU473.1[建筑科学—结构工程]