雷州半岛玄武岩残积土的物质成分与结构特征

张先伟 李晶晶 李峻 张静

张先伟, 李晶晶, 李峻, 张静. 2014: 雷州半岛玄武岩残积土的物质成分与结构特征. 工程地质学报, 22(5): 797-803. doi: 10.13544/j.cnki.jeg.2014.05.04
引用本文: 张先伟, 李晶晶, 李峻, 张静. 2014: 雷州半岛玄武岩残积土的物质成分与结构特征. 工程地质学报, 22(5): 797-803. doi: 10.13544/j.cnki.jeg.2014.05.04
ZHANG Xianwei, LI Jingjing, LI Jun, ZHANG Jing. 2014: STRUCTURE AND COMPOSITION OF RESIDUAL SOIL FROM DECOMPOSED BASALT AT LEIZHOU PENINSULA. JOURNAL OF ENGINEERING GEOLOGY, 22(5): 797-803. doi: 10.13544/j.cnki.jeg.2014.05.04
Citation: ZHANG Xianwei, LI Jingjing, LI Jun, ZHANG Jing. 2014: STRUCTURE AND COMPOSITION OF RESIDUAL SOIL FROM DECOMPOSED BASALT AT LEIZHOU PENINSULA. JOURNAL OF ENGINEERING GEOLOGY, 22(5): 797-803. doi: 10.13544/j.cnki.jeg.2014.05.04

雷州半岛玄武岩残积土的物质成分与结构特征

doi: 10.13544/j.cnki.jeg.2014.05.04
基金项目: 

湖北省自然科学基金(2011CDB406)和岩土及地下工程教育部重点实验室(同济大学)开放课题(KLE-TJGE-B1103)资助

详细信息
    作者简介:

    张先伟(1982- ),男,博士,助理研究员,主要从事特殊土的力学特性研究. Email: xwzhang@whrsm.ac.cn

  • 中图分类号: TU411

STRUCTURE AND COMPOSITION OF RESIDUAL SOIL FROM DECOMPOSED BASALT AT LEIZHOU PENINSULA

  • 摘要: 雷州半岛玄武岩残积土属于区域性特殊土,具有高液限、大孔隙比的较差的物理特性和高强度的较优的力学特性的异常组合,同时具有强收缩性、遇水湿化、易崩解的特殊性质。为探寻玄武岩残积土特殊的工程地质特性的机理,对其矿物成分、化学成分、结构形态、孔隙分布进行研究。结果表明,雷州半岛玄武岩残积土发育过程经历明显的富铝化、铁富集和盐淋失过程,黏土矿物以高岭石、三水铝石和伊利石为主,富含游离氧化铁、铝成分; 微观结构类型为凝块结构和絮凝结构,游离氧化铁作为胶结物质以包膜形式包裹颗粒形成团聚体,增强了土的结构强度; 孔隙以溶蚀孔隙以及团粒和絮凝体内微孔为主,微孔具有较大的比表面积和吸附能,吸水会产生较大的表面张力,引发软化、崩解现象。由于雷州半岛玄武岩残积土具有对水敏感,抗水性差特点,施工中应重点关注降雨引发的工程灾害。
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出版历程
  • 收稿日期:  2014-03-28
  • 修回日期:  2014-06-29
  • 刊出日期:  2014-10-25

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