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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第11卷    第4期    总第60期    2014年8月

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文章编号:1672-7029(2014)04-0063-05
砂质板岩粗粒土蠕变特性影响因素试验研究
韩铠屹1,刘群1,宋晓东2

(1.中南大学 土木工程学院,湖南 长沙 410075;
2.沪昆客专湖南有限公司,湖南 长沙 410008
)

摘 要: 通过单轴压缩蠕变试验研究含水率以及颗粒组成对粗粒土蠕变的影响规律,分析砂质板岩粗粒土在不同影响因素(含水状态、颗粒组成)下的蠕变特性,并基于与试验结果相符的H-K蠕变模型,探讨含水率、细颗粒含量、应力与蠕变参数之间的关系。研究结果表明:含水率、细颗粒含量均为影响粗粒土蠕变特性的重要因素,提出通过使用干燥或饱和含水态的粗粒土填料以及使用细颗粒含量为30%的粗粒土填料的途径来控制路堤的长期沉降。

 

关键字: 含水率;细颗粒含量;粗粒土;单轴试验;蠕变特性

Research on tests of the influence factors on creep property of sandy slate coarse-grained soil
HAN Kaiyi1, LIU Qun1, SONG Xiaodong2

1.School of Civil Engineering, Central South University, Changsha 410075, China;
2. Shanghai-Kunming Passenger Railway Hunan Corporation, Changsha 410008, China

Abstract:Uniaxial compression creep test was utilized to analyze the effect of moisture conditions and different particle grading components on creep property of sandy slate coarse-grained soil, and investigate the relations between moisture contents or fine particle contents and creep parameters on the basis of H-K Creep Model which is in agreement with the experimental results. The research results show that moisture content and fine particle content are the important factors that affect creep property of sandy slate coarse-grained soil and it is proposed to use dry or saturated coarse-grained soil and fine particle content accounting for 30% coarse-grained soil filler to decrease long-term settlement of embankment.

 

Key words: moisture content;fine particle content;coarse-grained soil;uniaxial test;creep property

ISSN 1672-7029
CN 43-1423/U

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