兰新铁路路基土冻胀特性试验研究  

Study on Frost Heaving Characteristics of Subgrade Soil of Lanzhou-Xinjiang Railway

作　　者：郭彦荣[1] 杨有海[1] 曾龙广[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《路基工程》2010年第2期149-151,共3页Subgrade Engineering

摘　　要：通过不同含水率、压实度和外部荷载的封闭系统冻胀试验,研究了兰新铁路路基土冻胀特性。试验结果表明,在封闭系统下土体是否冻胀与初始含水率有关;冻胀率随含水率的增大而增大,随压实度的增大而减小,外部荷载对冻胀有抑制作用;基于试验分析提出了适用于兰新铁路的冻害防治措施是排水和隔水。Through frost heaving test under different water content, compactness and external loads in closed system, this paper studies frost heaving characteristics of subgrade soil of Lanzhou-Xinjiang Railway. It is indicated from test result that in closed system, soil mass heave is related to initial water content; frozen-heave factor increases with the increase of water content and increases with the reduction of compactness; external load restrains frost heaving. The paper puts forward that drainage and water resistance are the countermeasures of frozen damage applicable for Lanzhou-Xinjiang Railway based on test analysis.

关 键 词：封闭系统 冻胀率 含水率 压实度 外部荷载 

分 类 号：U213.14[交通运输工程—道路与铁道工程]