高铁路基冻胀机理及防治措施研究

Research on frost heave mechanism and prevention measures of high-speed railway foundation

以兰新高速铁路门源至浩门段为研究背景,结合当地的地理环境和气候条件,在介绍路基冻胀机理的基础上,对冻胀规律和冻胀特点进行分析,确定了路基冻胀的主要影响因素。从换填法、保温隔热防治法、注盐法三个方面提出了整体防治措施,并通过工程实例观测表明,此冻害防治措施在实际中得到了有效的应用,实现了路基的变形控制目标。

Taking the Menyuan to Haomen section of the Lanxin high-speed railway as the research background, combined with the local geographical environment and climatic conditions, based on the introduction of the frost heave mechanism of the roadbed, the frost heave law and characteristics of the roadbed are analyzed, and the roadbed frost heave is determined. The main influencing factors. The overall prevention and control measures are proposed from three aspects: replacement method, thermal insulation prevention method, and salt injection method. The observations of engineering examples show that the frost damage prevention measures proposed in this paper have been effectively applied in practice, and the goal of subgrade deformation control has been achieved.