潮汐区淤泥质基础CFG群桩数值模拟分析

Numerical Simulation of CFG Pile Group for Muddy Foundation in Tidal Area

基于数值计算分析方法,建立了潮汐区淤泥质基础CFG桩施工力学模型,通过开展CFG桩与海相软土相互作用关系规律研究,得出结论:(1)CFG桩对下部淤泥黏土影响随深度变化逐渐降低;(2)CFG桩单排桩施工后,CFG桩两侧的竖直位移呈现CFG桩顶部膨胀较大,而在CFG底部沉降分布较为相似;(3)CFG桩双排桩施工后,CFG桩不仅影响周边土体,还对较远处的土体有影响。

Based on the numerical calculation and analysis method,this paper establishes a mechanical model for the construction of CFG piles in the mud foundation in the tidal area.Through the research on the interaction between CFG piles and marine soft soil,it draws the conclusion as as follows:(1)The influence ofCFG pile on the lower muck clay decreases with the change of depth.(2)After the construction ofa single row of CFG piles,the vertical displacement on both sides of the CFG pile shows that the top of the CFG pile expands greatly,while the settlement distribution at the bottom ofthe CFG pile is similar.(3)After the construction of double row CFG piles,CFG piles not only affect the surrounding soil mass,but also affect the soil mass far away.