高速铁路CFG桩复合地基沉降影响因素分析

High-Speed Railway CFG Pile Composite Foundation Settlement Influence Factors Analysis

CFG桩具有承载力高、沉降量小、工期短等优点,已广泛应用于工程建筑地基处理中,而CFG桩在高铁地基中的应用仅处于起步阶段。文章以哈大高铁北沙河特大桥小里程端为研究对象,通过在地基土为冻土和非冻土的情况下改变CFG桩体参数及路基高度,以有限元软件ADINA对地基进行多次模拟,得出各参数的改变与地基沉降的关系,对CFG桩复合地基在高速铁路中的应用具有一定的指导意义。

Because of high bearing capacity and small settlement of CFG pile,CFG pile have been used widely in foundation treatment of engineering construction,but it has applicant in high-speed railway roadbed only in the initial stage.In this paper, based on the project of Beishahe of Hada high-speed rail,simulated with the finite element model by ADINA by changing the parameters of CFG pile and roadbed height in the situation of permafrost and unpermafrost of foundation,obtained the relationship of parameters and foundation settlement,it has the directive significance for high-speed railway with CFG pile composite foundation.