软基桩侧负摩阻力弹塑性分析及几个关键问题

Elasto-Plastic Analysis and Key Problems on Negative Skin Friction of Pile in Soft Soil Picket

文中基于桩土共同作用机理,考虑桩土体接触面效应,建立了软土地基桩侧表面负摩阻力三维弹塑性有限元分析模型。在此基础上,重点模拟分析了某典型软土地基土体特性、桩土接触面参数、土体结构性及堆载等因素对负摩阻力的影响规律。最后,对未来关于负摩阻力研究仍亟需解决的几个关键问题等进行了初步探讨。研究成果和分析思路可为类似条件下桩侧负摩阻力的计算和施工提供有益的参考。

A 3D elasto-plastic Finite Element model for the negative skin friction of single pile in soft soil picket was established based on the pile-soil interaction concerning the pile-soil interface.The relationships between negative skin friction and its main influencing factors were studied on this point.An analyze was done concerning the influencing factors included the properties of pile,soil layers,pile-soil interface,soft soil structure characteristics,surcharge and so on.And several urgent resolved key problems need to be studied further were put forward.The above-mentioned results are expected to provide a good research clue for the study on the design of pile and pile construction in other similar engineering projects in the future for the purpose of giving a significant reference.