严寒地区高速铁路路基密封胶应用研究

摘要

The Harbin-Dalian high-speed railway is the first ballastless track high-speed railway built in the severe cold area of Northeast China;it has strict requirement on the deformation of ballastless track.Water is one of the necessary conditions of the subgrade frost-heave deformation;how to prevent the surface water from infiltrating into the subgrade bed is the key factor to control the subgrade frost-heave deformation.Based on such starting point,this paper focuses on elaborating the application of the new type sealant of structural joint on the roadbed and the tracks of Harbin-Dalian high-speed railway.%哈大高铁作为在东北严寒地区建造的第一条无砟轨道高速铁路,对无砟轨道变形有着极为苛刻的要求.水作为路基冻胀的必要条件之一,如何阻止地表水下渗路基本体是控制路基冻胀变形的关键因素,以此为出发点,重点对哈大高铁新型路基与轨道结构缝密封胶的应用研究进行了阐述.