海相黏土孔压静力触探试验指标与离子化学特性的关系

海相黏土孔压静力触探试验指标与离子化学特性的关系 English Version

1.Institute of Geotechnical Engineering Southeast University Nanjing 210093 China 2.Civil Engineering College Nanjing Forest University Nanjing 210037 China

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。
- 孔压静力触探 /
- 原位测试 /
- 离子成分 /
- 海相黏土 /
- Fe3+含量
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.
- piezocone penetration test /
- in-situ test /
- ion component /
- marine clay /
- Fe3+ concentration