高速铁路路基疏桩筏基研究及应用
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。
Abstract: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.
中文标题:
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
Sun Honglin
作者简介:孙红林,1973年生,男,汉族,山西曲沃人,大学本科,学士学位,教授级高级工程师,注册土木(岩土)工程师,主要从事铁路勘察、设计与科研工作;E-mail:hlin_sun@sina.com
通讯地址:
中铁第四勘察设计院集团有限公司地路处, 湖北武汉 430063
ChinaRailwaySiyuanSurveyandDesignGroupCo.,Ltd.Wuhan430063,China
中图分类号:U416
doi:10.3969/j.issn.1007-2993.2013.02.010
出版物:岩土工程技术
收稿日期:2013-01-19
关键词:高速铁路,无砟轨道,CFG桩,疏桩,筏板
Key words:high speed railway,ballastless track,CFG pile,sparse pile,raft
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基金项目:
基金项目: 铁道部科技研究开发计划项目(2008G031-C)
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