遂渝线无碴轨道桩网结构地基处理技术

Discuss on the Column-Net Structure of Ballastless Track in Sui-Yu Railway Line

研究目的:探讨有关遂渝线无碴轨道桩网结构加固地基技术设计计算理论等方面的问题。研究方法:通过回顾无碴轨道客运专线在中国的发展现状,结合遂渝客运专线土质路基上修建的无碴轨道综合试验段,对桩网结构地基处理技术设计计算理论进行了深入的探讨,包括桩网结构路基的构造研究、柔性拱的研究、承载力研究及沉降研究四个方面。基于桩网结构路基在列车荷载反复作用下,桩、网、土三者之间相互作用的复杂性,文章对桩网结构的室内大比例模型试验、现场原位动态测试试验、数值计算方法进行了详细的阐述。研究结果:对桩网结构的设计及计算方法进行了总结,并对试验段已开展的研究工作进行了阐述,希望今后在此基础上在无碴轨道桩网路基的施工中继续深入研究,积累更多的施工经验。

Research purposes： The exploration is made on issues of design calculation theory for Column - Net Structure technology of foundation treatment of Ballastless Track in Sui - Yu Railway Line.Research methods：The article reviewed the present situation of construction of Ballastless Track in the Passenger Transportation Line in China. Based on experimental section of Unballasted Track on soil subgrade in Sui - Yu Railway Line,design calculation theory of Column - Net Structure has been carried on detailed explanation, including the constitution research, the flexible arch research, bearing capacity research and settlement research. Considered to the interaction complexity of the column, net and soil under the train cyclic load, the paper detailed describes indoor large scale model testing, field dynamic testing and numerical calculation method about the Column -Net Structure.Research results： The method of design calculation for Column - Net Structure has been carried on the summary. And the paper describes the developed research in experimental section. It hopes that these can provide more experiences for further research.