湿陷性黄土地区铁路的主要技术问题及其工程措施

湿陷性黄土地基是基础工程中最为复杂的地基类型之一,采取可靠的工程措施以确保基础工程的安全稳定,是湿陷性黄土地区客运专线建设必须解决的技术难题。通过分析湿陷性黄土的主要工程特性,提出湿陷性黄土地区铁路工程的地基湿陷性、边坡稳定性、填料改良、黄土隧道变形、桩基负摩擦力等主要技术问题。在借鉴国内外已有的成熟经验和研究成果的基础上,湿陷性黄土地区铁路工程采取合理选择线路位置、科学确定工点方案、采取可靠的地基处理等措施,为铁路客运专线建设提供可靠的技术支撑。

Main Technical Problems and Engineering Measures of Railway in Collapsible Loess Area

Collapsible loess area is one of the most complicated foundations of infrastructure. To construct passenger dedicated line incollapsible loess area, we must take reliable measures to ensure the safety and stability of infrastructure projects. Through analysis of themain characteristics of collapsible loess, it puts forward the central technical problems including foundation collapsibility, side slope stability,packing amelioration, loess tunnel deformation, and negative frictional force of pile foundation. On the basis of references of foreign anddomestic experience and research achievements, we should take measures of reasonably choosing line location, scientifically decidingthe plan of construction site, and reliably disposing foundation for railway projects in collapsible loess area, so as to supply technicalsupport for the construction of passenger dedicated line.