季节性冻土区高速铁路路基防冻胀设计优化  

Design Optimization of Anti-frost-heaving for High Speed Railway Subgrade in Seasonal Frozen Soil Regions

作　　者：李先明 

机构地区：[1]中铁城市发展投资集团有限公司,四川成都610031

出　　处：《铁道建筑》2016年第11期96-100,共5页Railway Engineering

基　　金：铁道部科技研究开发计划(Z2012-062)

摘　　要：哈大(哈尔滨—大连)高铁是我国第一条季节性冻土区无砟轨道高速铁路,抑制路基冻胀变形是保证轨道结构稳定的必要条件。哈大高铁在建造过程中,通过前期控制和后期补强,将路基冻胀变形控制在有限范围内,保证了运营安全。本文根据哈大高铁路基冻胀深化研究成果及监测数据,对哈大高铁路基冻胀规律及工程特点进行总结,对路基防冻胀设计中填料冻胀特性的辨识、路基冻结深度的选取与修正、级配碎石掺水泥的冻胀特性、既有路基防排水结构的优劣等问题进行了探讨,从工程应用方面提出了建议。The Harbin-Dalian high speed railway is the first high speed railway with ballastless track in the seasonal frozen soil regions of China and controlling the subgrade frost-heaving deformation is necessary to ensure the stability of the track structure.During the construction process of Harbin-Dalian high speed railway,the subgrade frostheaving deformation could be controlled in a limited range for the operation safety through the early control and late reinforcement.Based on the deep research results of subgrade frost-heaving and monitoring data of Harbin-Dalian high speed railway,the subgrade frost-heaving law and engineering characteristics of H arbin-Dalian high-speed railway were summarized,the problems including frost-heaving characteristics identification of filling material,the adoption and modification of subgrade frost depth,the frost-heaving characteristics of graded gravel with cement and the advantages and disadvantages of existing waterproofing and drainage structures were discussed in subgrade antifrost-heaving design,and the suggestions were put forward from the aspect of engineering application.

关 键 词：季节性冻土区 高速铁路 路基冻胀 设计优化 

分 类 号：U213.153[交通运输工程—道路与铁道工程]