气泡混合轻质土在道路冻土地基保护中的试验研究  

Experimental Research on Foamed Cement Banking for Frozen Soil Foundation Protection

作　　者：林乐彬[1] 刘寒冰[1] 韩硕[1] 吴立坚[2] 

机构地区：[1]吉林大学交通学院,吉林长春130022 [2]交通部公路科学研究院,北京100088

出　　处：《公路交通科技》2009年第6期55-58,共4页Journal of Highway and Transportation Research and Development

摘　　要：为减少因路基融沉引起不均匀沉降对冻土路段的破坏性影响,选择合适的材料铺设人工隔热保温层是防止冻土融化的有效技术措施。由于气泡混合轻质土导热系数小、隔热性能明显、承载能力强、使用成本低、工艺简单、施工速度快等特点,在总结国内外冻土研究成果的基础上,结合试验路段自然气候特点,提出将轻质土用于冻土地基隔热保温的修筑技术,并在我国北方某一级公路试验铺筑。通过对轻质土试验段隔热效果的监测和道路使用状况跟踪观测,表明其隔热效果良好,能够较好防止公路的季节性冻胀与永久冻土地基的融沉,可应用于类似工程。In order to reduce the destructive influence on frozen soil section caused by uneven settlement of roadbed thawing collapse, it is effectively technical measures to select suitable materials in insulation construction to protect thawing of frozen soils. Because foamed cement banking （FCB） is characterized by low thermal conductivity, high insulation capacity, strong bearing capacity, low using cost, simple construction process and fast construction speed, based on the results of frozen soil research works abroad and with consideration of climate of test section, it is put forward that to apply FCB in frozen soil foundation region for heat insulation and pave it in first class highway of north China. The results of monitoring on effectiveness of FCB in heat insulation construction and observation on using condition of the roads show that FCB technique can effectively prevent seasonal frost heaving and thawing of permafrost and can be applied in such kind of construction projects.

关 键 词：道路工程 冻土地基保护 隔热保温层 气泡混合轻质土 

分 类 号：U416.168[交通运输工程—道路与铁道工程]