冻土区块石夹层路基防冻胀翻浆效果试验研究  

Experimental study of anti-frost-heave and frost boil effect of block-stone-interlayer embankment in permafrost regions

作　　者：刘德仁[1,2] 赖远明[1] 董元宏[1] 李双洋[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,兰州730000 [2]兰州交通大学土木工程学院,兰州730070

出　　处：《岩土力学》2012年第3期753-756,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.40730736;40801029);冻土工程国家重点实验室研究项目(No.SKLFSE-ZQ-03;SKLFSE-ZY-03);寒旱所青年人才成长基金项目(No.51O984931);中国科学院西部行动计划(二期)项目(No.KZCX2-XB2-10)

摘　　要：基于对冻土区路基冻胀翻浆病害机制的分析,提出了一种综合利用透水土工布、块碎石层和防水土工布的新型防道路冻胀翻浆的路基结构,并通过室内模型试验研究其防冻胀翻浆效果。结果表明:与普通路基相比,不论环境温度最高还是最低时,新型综合防冻胀翻浆路基不但能有效地降低路基内的温度,具有良好的降温效果;而且能大幅度地减小路基内的含水率,并且含水率减小率随着气温周期循环的增加呈线性增大的趋势,这对防止冻胀翻浆病害的发生是有利的;此外,新型综合防冻胀翻浆路基结构有成本低、易于施工等特点,极具工程应用前景。Based on frost heave and frost boil disease mechanism analyses of embankment in permafrost regions,a new synthetical embankment with permeable geotextile,block stone interlayer and waterproof geotextile is proposed,whose anti-frost heave and boil effect is investigated by a model test.The results show that,compared with common embankment,the new synthetical anti-frost heave and boil embankment can decrease its temperature and have good cooling effect whether the air temperature is high or not.Moreover,it can decrease water content effectively;and the decrease ratio of water content is increasing with period increasing.These properties are advantageous to prevent frost heave and boil diseases from occurring and developing.What＇s more,the new synthetical anti-frost heave and boil embankment is easily constructed and its cost is also low.Therefore,it has extensive application prospects.

关 键 词：冻土区 路基 冻胀 翻浆 新型综合路基 

分 类 号：TU445[建筑科学—岩土工程]