| 冻结方式对冻土试样制备的影响 |
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| 引用本文： | 郑剑锋,赵淑萍,马巍,蒲毅彬.冻结方式对冻土试样制备的影响[J].冰川冻土,2009,31(1). |
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| 作者姓名： | 郑剑锋 赵淑萍 马巍 蒲毅彬 |
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| 作者单位： | 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,甘肃兰州,730000 |
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| 基金项目： | 国家自然科学基金，国家自然科学基础人才培养基金冰川学冻土学特殊学科点项目 |
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| 摘 要： | 冻土试样的制备是进行冻土试验最为基础而重要的工作,其中土样在冻结过程中受到的影响直接关系到试样内部状况.为研究冻结方式对粉质粘土含水量和干密度分布的影响,采取不同的冻结方式即单向冻结和多向冻结方法,对比分析不同状态下兰州黄土和北麓河粘土冻结试样各部位含水量与干密度的分布状况.结果表明:试样内含水量和干密度的分布程度取决于土的类型、饱和状态和冻结方式,具体为:非饱和兰州黄土在多向冻结情况下,可以取得比单向冻结更加均匀的冻结试样;饱和兰州黄土冻结试样无论是单向冻结还是多向冻结都较为均匀;北麓河粘土无论饱和与否,均以单向冻结为好.
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| 关 键 词： | 干密度 含水量 单向冻结 多向冻结 |
Study of the Effect of Freezing on Frozen Soil Specimen Preparation |
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| ZHENG Jian-feng,ZHAO Shu-ping,MA Wei,PU Yi-bin.Study of the Effect of Freezing on Frozen Soil Specimen Preparation[J].Journal of Glaciology and Geocryology,2009,31(1). |
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| Authors: | ZHENG Jian-feng ZHAO Shu-ping MA Wei PU Yi-bin |
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| Institution: | State Key Laboratory of Frozen Soil Engineering;CAREERI;CAS;Lanzhou Gansu 730000;China |
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| Abstract: | The specimen-preparing of soil is the most foundational and important step for experiment of frozen soil.In order to study the effect of freezing on the distributions of water content and dry density in silty clay,different freezing modes,axial freezing and triaxial freezing,are used to prepare frozen soil specimens.Contrasting and analyzing the dry density and moisture content distributions of Lanzhou Loess and Beiluhe Clay,which originally are evenly distributed,the result shows that the water content an ... |
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| Keywords: | dry density moisture content axial freezing triaxial freezing |
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