摘要
采用CFG桩桩网复合地基处理高速铁路低矮软土路基,无法保证循环荷载作用下的长期稳定性,也不能充分发挥桩体高承载力的优势。为此,在无砟轨道高速铁路低矮软土路基处理中采用了"疏桩筏基"结构型式,并选取代表性工点进行了结构沉降变形特性、桩土受力特性及筏板受力变形特性等测试,对设计计算方法进行了探讨,提出了工程应用建议和需进一步深入研究的问题。
When low subgrade on deep soft ground in high speed railway is treated with CFG pile-wet composite foundation,it cannot ensure the long-term stability under cyclic loading and the pile cannot give full play to the advantages of high bearing capacity. So the sparse pile-raft foundation structure is applied in low subgrade on deep soft ground in ballastless track high-speed railway, and the characteristics of settlement deformation of structure, pile-soil stress and the loading deformation of raft are tested through choosing representative working points. Moreover, the design calculation method is investigated and some proposal on engineering application need further in-depth studys.
出处
《岩土工程技术》
2013年第2期95-99,共5页
Geotechnical Engineering Technique
基金
铁道部科技研究开发计划项目(2008G031-C)
关键词
高速铁路
无砟轨道
CFG桩
疏桩
筏板
high speed railway
ballastless track
CFG pile
sparse pile
raft
