冻融环境下加筋膨胀土边坡力学模型试验与研究  

Experimental study of reinforced expansive soil slope in freeze-thaw environment

作　　者：徐丽丽 张滨 李兆宇 吴志琴 

机构地区：[1]黑龙江省水利科学研究院,哈尔滨150080

出　　处：《黑龙江大学工程学报》2014年第3期234-237,共4页Journal of Engineering of Heilongjiang University

基　　金：水利部公益性行业科研专项(201001027)

摘　　要：针对寒区膨胀土边坡冻胀问题,提出采用土工织物加筋处理技术。通过加筋处理及未处理两组室内冻土力学模型试验对比分析,研究在冻融循环作用下土工织物加筋膨胀土边坡的运行机制和效果。试验结果表明:1在土体冻结过程中,未处理的膨胀土边坡不均匀冻胀明显,土工织物加筋能有效抑制结构不均匀冻胀;2土工织物对水分的迁移有阻隔作用,加筋土处理模型的冻深略大于未处理模型;3碎石聚氨酯固脚具有一定的保温防冻胀作用。For freeze injury of expansive soil slope , a technology using geotextile reinforced was handled .In accordance with the comparation and analysis of the treated and untreated frozen mechanical model test , the operation mechanism and effects of geotextile-reinforced expansive soil slope under freezing thaw cycle conditions are analyzed.Conclusion： ① In the process of soil freezing , untreated expansive soil slope uneven heaving obvious, geotextile-reinforced structure can effectively suppress uneven frost heave; ②Geotextile can block water migration in the soil , frozen deep of geotextile-reinforced model is slightly larger than the untreated models; ③Elastocoast can increase heat resistance;the Elastocoast protection-foundation has heat preservation effect .

关 键 词：冻融循环 土工织物加筋 膨胀土边坡 

分 类 号：TV672[水利工程—水利水电工程]