路基稳定性无损检测方法技术研究

研究目的:通过路基稳定性检测可测出基床强度(承载力)、道碴陷槽、翻浆冒泥等基床病害,同时还要满足不干扰行车、安全、快速、经济、可靠等客观条件的要求。研究方法:针对过去路基检测要破损路基,且不能全面反映路基的现状,结合实际采用无损检测技术对路基进行全面研究,从而对路基稳定性作出评价。研究结果:用地质雷达和瞬态瑞雷波法等检测技术检测既有铁路路基,通过测定适当的物理量,并与规范数值进行相关比较,准确地揭示出路基现状及病害,并对既有铁路路基稳定性作出评价。研究结论:用地质雷达和瞬态瑞雷波法等检测既有铁路路基,总结出一整套操作性较强的快速、准确、简便、无损、有效的检测方法;可准确地揭示出路基现状及病害,并可对检测区段路基稳定性作出评价,使既有线提速路基稳定性检测在质和量两方面得到较大提高和突破;成果已得到了广泛推广应用,经济和社会效益显著。

Research on the Method of Subgrade Stability None-damaged Testing

Research purposes: By testing the stability of railway subgrade,rigidity of roadbed and some diseases such as subsidence of ballast,mud scum and so on are exactly detected safely,quickly and economically,while no disturbing railway running. Research methods:In the past,the subgrade can be damaged by the old measuring method and the real situation of it can not be discovered fully.Now combined with the fact situation,the none-damaged measuring method is accepted to research the subgrade totally,so that the stability of subgrade is evaluated. Research results:By testing some proper physical volume,the present manner and disease of the existing railway subgrade is well detected,relating with the standard value of regulation.And evaluation of the subgrade stability is also provided. Research conclusions:This paper presents how to use the geological radar and transient Rayleigh wave method to test the existing railway subgrade,and summarizes a complete testing method that is of high maneuverability,rapid,accurate,simple and convenient,none-damaged and effective.By determining some physical quantities and analyzing the relativity between the physical quantities and the values in specification,this method can accurately disclose the status quo and disease of subgrade and evaluate the stability of the existing railway subgrade.It is very important for traveling safety and has remarkable economic and social benefits