| 颗粒级配对火山灰力学特性影响的试验研究 |
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| 引用本文： | 蒋明镜,郑敏,刘芳,王闯,张熇.颗粒级配对火山灰力学特性影响的试验研究[J].扬州大学学报(自然科学版),2010,13(1). |
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| 作者姓名： | 蒋明镜 郑敏 刘芳 王闯 张熇 |
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| 作者单位： | 1. 同济大学地下建筑与工程系,上海200092;同济大学岩土及地下工程教育部重点实验室,上海200092
2. 中国空间技术研究院,北京,100094 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 以吉林省靖宇县的黑色、红色两种火山灰为原材料,分别配制了5种不同级配的试样.通过土粒相对密度、矿物成分与颗粒形态、直接剪切和固结试验分析,得到该火山灰材料的土粒相对密度、化学成分、颗粒形态、剪切强度、压缩性等物理力学特性,并分析了5种级配的中值粒径d50和不均匀系数cu对火山灰剪切强度的影响.靖宇火山灰主要由泡沫状的火山玻璃组成,未经历过长期水力、风力的磨圆作用,颗粒棱角分明,其剪切特性与干沙土类似,内聚力很小,剪切强度受级配的影响较大.在配制的5种级配曲线的粒径范围,试样的内摩擦角随着中值粒径d50的增大而增大,不均匀系数cu对试样内摩擦角的影响较小.
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| 关 键 词： | 火山灰 颗粒级配 抗剪强度 压缩性 |
Experiment research on influence of grain size distribution on mechanical properties of volcanic ash in northeast China |
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| JIANG Ming-jinga,b ,ZHENG Mina,b,LIU Fanga,WANG Chuang,ZHANG He.Experiment research on influence of grain size distribution on mechanical properties of volcanic ash in northeast China[J].Journal of Yangzhou University(Natural Science Edition),2010,13(1). |
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| Authors: | JIANG Ming-jinga b ZHENG Mina b LIU Fanga WANG Chuang ZHANG He |
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| Institution: | JIANG Ming-jing1a,b *,ZHENG Min1a,b,LIU Fang1a,WANG Chuang2,ZHANG He2(1.a.Dept of Geotech Engin,b.Key Lab of Geotech & Underground Engin of Minist of Educ,Tongji Univ,Shanghai 200092,China,2.China Acad of Space Tech,Beijing 100094,China) |
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| Abstract: | Originated from two kinds of volcanic ashes from Jingyu County,Jilin Province,five samples are prepared according to different grain size distribution.The specific gravity,mineralogy chemical composition,particle shape are examined in laboratory.The shear strength and compressibility of those samples are tested by direct shear tests and one dimension consolidation tests,and the influence of grain size distribution on shear strength and compressibility is also analyzed.Volcanic ashes in Jingyu County are mai... |
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| Keywords: | volcanic ash grain size distribution shear strength compressibility |
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