| 海相黏土孔压静力触探试验指标与离子化学特性的关系 |
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| 引用本文： | 邵光辉,刘松玉,杜广印,蔡国军.海相黏土孔压静力触探试验指标与离子化学特性的关系[J].岩土工程学报,2007,29(10):1582-1586. |
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| 作者姓名： | 邵光辉 刘松玉 杜广印 蔡国军 |
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| 作者单位： | 东南大学岩土工程研究所；东南大学岩土工程研究所 江苏南京210093；南京林业大学土木工程学院；江苏南京210037；江苏南京210093； |
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| 摘 要： | 通过孔压静力触探试验(CPTU),获得连云港海相黏土的不排水抗剪强度、超固结比和静止侧压力系数,并对土样进行离子化学分析。原位测试指标与各离子含量的相关性分析表明,显著影响原位测试指标的是Fe3+含量。Fe3+在连云港海相黏土中以胶体方式存在,影响土颗粒之间的胶结联结,较多Fe(OH)3胶体形成的粒间联结能造成土体的轻微超固结性,影响土的弹性特征。
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| 关 键 词： | 孔压静力触探 原位测试 离子成分 海相黏土 Fe3+含量 |
| 文章编号： | 1000-4548（2007）10-1582-05 |
| 修稿时间： | 2006-09-18 |
Correlation between CPTU index characteristics and ion chemistry of marine clay |
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| SHAO Guang-hui,LIU Song-yu,DU Guang-yin,CAI Guo-jun.Correlation between CPTU index characteristics and ion chemistry of marine clay[J].Chinese Journal of Geotechnical Engineering,2007,29(10):1582-1586. |
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| Authors: | SHAO Guang-hui LIU Song-yu DU Guang-yin CAI Guo-jun |
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| Affiliation: | 1.Institute of Geotechnical Engineering Southeast University Nanjing 210093 China 2.Civil Engineering College Nanjing Forest University Nanjing 210037 China |
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| Abstract: | The piezocone penetration tests(CPTU)were performed in Lanyungang,China,and several in-situ test indexes such as undrained shear strength(Su),overconsolidation ratio(OCR) and coefficient of earth pressure at rest(K0) were calculated.The ionic chemistry examinations were also adopted.It was shown that the Fe3+ concentration was the obvious factor influencing on in-situ test index of Lianyungang marine clay.The Fe3+ existed as colloid in Lianyungang marine clay,which might influence the cementation between soil particles.More Fe(OH)3 colloid content could lead to light overconsolidation and influence the elastics characteristics of the clay. |
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| Keywords: | piezocone penetration test in-situ test ion component marine clay Fe3+ concentration |
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