摘要
研究目的:确定郑西客运专线湿陷性黄土填料的改良技术和填筑压实工艺。研究结果:水泥改良湿陷性黄土最大干密度随时间呈衰减趋势;水泥改良湿陷性黄土的压实厚度严格控制在30 cm以内,松铺系数为1.1~1.2;水泥改良陷性黄土不适合采用强振碾压,一般来说静压的施工效果较好,碾压遍数控制在4~5遍;水泥改良湿陷性黄土的含水率对压实度影响较大,含水量偏差应控制在-0.5%~+1.5%;尽量缩短水泥改良土从拌和到碾压完成的时间,遵循"三快一密实原则":快速摊铺、快速整平、碾压密实、快速检测,确保碾压和检测在水泥初凝前完成。
Research purposes:To determine the improvment techniques of collapsible loess fill materials and the process of reclamation and compaction. Research results:Maximum dry density of Cement improving collapsible loess decay as time postpones; Cement improving collapsible loess strictly control the compaction thickness of 30 cm and coefficient of loose paving material of 1.1~1.2;Cement improving collapsible loess is not suitable for the strong vibration roller compaction.Staticis compaction is more better in ge...
出处
《铁道工程学报》
EI
北大核心
2007年第S1期43-47,共5页
Journal of Railway Engineering Society
关键词
客运专线
湿陷性黄土
水泥改良土
填筑
压实
passenger dedicated railway line
collapsible loess
cement improving soild
reclamation
compaction