高速铁路路基疏桩筏基研究及应用  

Research and Application of Settlement Control Effects of Sparse CFG-Pile Raft Foundation on High-Speed Railway

作　　者：孙红林[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司地路处,湖北武汉430063

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)

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.

关 键 词：高速铁路 无砟轨道 CFG桩 疏桩 筏板 

分 类 号：U416[交通运输工程—道路与铁道工程]