桩-土作用在大型旅客站房基础设计中的应用

当大型旅客站房基础与地下出站通道重叠时,由于地下出站通道刚度大、结构超长,且属半露天地下结构,对温度作用变化明显,利用传统的刚性固结模型对站房基础进行设计时较难得到合理的结果或造成巨大的浪费。论述桩-土作用机理的复杂性,并对桩-土作用力学模型进行分析。通过分布弹簧模型对旅客站房在温度作用下的结构内力进行分析,并与刚性固结模型计算结果进行对比,得出旅客站房基础设计考虑桩-土作用的合理化计算模式。

Application of Pile-Soil Interaction in Foundation Design of Large-scale Passenger Station Building

When the foundation of a large-scale passenger station building overlaps with the underground exit passageway,if using traditional rigid connection model to design the station building foundation,it will be difficult to obtain a reasonable result or it is more likely that a huge waste will be produced, because the structure of the underground exit passageway of a large-scale station is usually highly rigid, ultra long, semi-open-air, and susceptible to temperature changing. For this reason, this paper expounded the complexity of pile-soil interaction mechanism,and analyzed the mechanical model of pile-soil interaction. Through using distributional spring model to calculate the internal force of passenger station building structure under the action of temperature changing, and by comparison with the calculation result of rigid connection model,a reasonable calculation model in term of pile-soil interaction was eventually obtained for foundation design of passenger station building.