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微型触探仪的研制及粉质粘土中的静力触探试验研究
Development of Miniature Cone Penetrometer and Study on MCPT in Silty Clay
查看参考文献7篇
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文摘
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研制了一种新型的微型触探仪,该仪器能对贯入阻力与贯入深度数据进行自动采集.同时为了进行微型静力触探试验研究,研制了一套新颖的土样制作装置.通过用微型触探仪对粉质粘土进行静力触探试验发现,触探曲线与锥头锥角没有必然的联系,而且其初始段为直线段.对粉质粘土,当锥头贯入到一定深度时,锥头阻力将趋于稳定,这是由不同围压下土体的不同破坏机理引起的.通过对触探曲线上的特征值与土力学参数之间的关系进行分析发现,无量纲锥头阻力系数和tanφ(φ为土的内摩擦角)成近似的线性关系.另外,还得到了锥头极限阻力与临界深度之间的经验关系. |
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其他语种文摘
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A new kind of miniature cone penetrometer was developed in order to acquire automatically the cone penetration resistance and depth in MCPT. At the same time, a new experimental facility was developed to make soil samples for MCPT. A series of penetration tests for silty soil were carried out with the miniature cone penetrometer. It is found that the penetration curve has no relation with the angle of cone and its initial seg-ment is straight. For silty clay, cone penetration resistance will tend to be changeless when the penetration depth attains to a certain value. This is caused by the different failure mechanism of soil under different lateral compressive stresses. The relation between the characteristic values of penetration curve and soil mechanics parameters was analyzed. It is found that the dimensionless cone resistance factor is linear with tan<p where cp is the internal friction angle of soil. In addition, the experiential relation between limit cone penetration resist-ance and critical depth is obtained. |
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来源
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实验力学
,2005,20(2):207-212 【核心库】
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关键词
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静力触探
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微型触探仪
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锥头阻力
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临界深度
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地址
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1.
中国科学院力学研究所, 北京, 100080
2.
山东大学土建与水利学院, 山东, 济南, 250061
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4888 |
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学科
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建筑科学 |
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基金
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国家973计划
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国土资源部科技专项
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文献收藏号
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CSCD:1992856
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参考文献 共
7
共1页
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1.
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力学进展,2004,34(2):251-262
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被引
6
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2.
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Use of In Situ Tests in Geotechnical Engineering, Proceedings of In Situ′86, Blacksburg,1986:926-948
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被引
1
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3.
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被引
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4.
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Transportation Research Record,1999,1(1652):236-245
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5.
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Geotechnique,1999,49(4):543-552
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被引
27
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6.
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静力触探,1981
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被引
13
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7.
魏杰. 砂土静力触探探头阻力增量弹塑性混合解[J].
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被引
4
次
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