| CT检测技术在土样初始损伤研究中的应用 |
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| 引用本文： | 郑剑锋,赵淑萍,马巍,蒲毅彬. CT检测技术在土样初始损伤研究中的应用[J]. 兰州大学学报(自然科学版), 2009, 45(2) |
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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,兰州,730000;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;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;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 |
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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基金 |
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| 摘 要： | 对用短时压实法制成的两种粉质粘土试样进行CT扫描,获得了两种试样中土颗粒和水的标称质量吸收系数.通过CT扫描结果,对试样的初始损伤进行评价.整体来看,试样的CT数方差不大.密度分布比较均匀,比分层击实法制成的试样的均匀性好,且粘粒含量高,用短时击实法较容易获得初始损伤较小的试样.对密度分布进行具体分析发现:轴向看,试样两端密度大,中间密度小;径向看,周边密度大,中心密度小;径向的总体均匀性比轴向的好.
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| 关 键 词： | 短时压实法制样法 粉质粘土 CT检测 初始损伤 质量吸收系数 |
Application of CT testing technology in evaluating the uniformity of soil samples |
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| ZHENG Jian-feng,ZHA Shu-ping,MA Wei,PU Yi-bin. Application of CT testing technology in evaluating the uniformity of soil samples[J]. Journal of Lanzhou University(Natural Science), 2009, 45(2) |
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| Authors: | ZHENG Jian-feng ZHA Shu-ping MA Wei PU Yi-bin |
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| Affiliation: | State Key Laboratory of Frozen Soil Engineering;Cold and Arid Regions Environmental and Engineering Research Institute;Chinese Academy of Sciences;Lanzhou 730000;China |
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| Abstract: | Two kinds of silty clay samples made through little-pressing specimen-preparing metheod were tested by computerized tomography technology.The mass absorbing coefficient of soil grain and water were obtained and the uniformity damage to the samples was evaluated.The results show that the variance of CT value is little and the density distribution is well-proportioned.The little-pressing specimen-preparing method is better than traditional layered-bumping specimen-preparing method.Furthermore,the higher the c... |
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| Keywords: | little-pressing specimen-preparing method silty clay CT testing technology uniformity of soil sample mass absorbing coefficient |
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