广州白云机场P4交通综合体项目地基基础大跨度转换梁结构数值模拟计算分析

Finite element analysis of long-span transfer beam structure for foundation design of the P4transportation complex project of Guangzhou Baiyun Airport

广州白云机场P4交通综合体项目在地基基础结构设计时,采用大跨度转换梁结构横跨广州地铁三号线隧道及工作井。在设计时采用传统PKPM软件进行计算,考虑到项目的结构复杂性和桩基础桩土共同作用的影响,本文通过PLAXIS 3D软件对项目横跨地铁结构的部分进行了数值模拟计算,将有限元计算结果与PKPM的计算结果进行了对比分析,评估了结构设计参数的安全性,并且验证了有限元计算方法在工程应用中的可行性。

In the foundation structure design of P4 transportation complex project of Guangzhou Baiyun Airport, the large-span transfer beam structure is adopted to cross the tunnels and a working-well of Guangzhou Metro Line 3. In the structure design, the traditional PKPM software is used for calculation, considering the structural complexity of the project and the influence of pile-soil interaction of the pile foundation, in this paper,PLAXIS 3D software was used to carry out numerical simulation of the part across the subway structure of the project. The finite element calculation results were compared and analyzed with those obtained from PKPM to evaluate the safety of structural design parameters, in addition, the feasibility of finite element method in engineering application is verified.