| N2红黏土水稳性机理试验研究 |
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| 引用本文： | 孙元春,辛民高,蔡云廷.N2红黏土水稳性机理试验研究[J].路基工程,2021,0(4):69-72. |
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| 作者姓名： | 孙元春 辛民高 蔡云廷 |
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| 作者单位： | 中国铁路设计集团有限公司，天津 300251 |
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| 基金项目： | 中国铁路设计集团科技发展计划重点项目:北方上第三系地层工程地质特性及对策研究（721416） |
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| 摘 要： | 以某铁路隧道穿越N2红黏土地层为依托，分析N2红黏土的基本物理特征；通过压缩变形、剪切强度等试验手段，研究其水稳性特征，揭示浸水前后变形、强度特性的变化规律；采用粒度分析、X-RAY衍射分析、扫描电镜等方法，对其遇水变异机理进行了分析。结果表明:水是导致N2红黏土物理力学性质发生变化的最主要因素，其水稳机理主要体现为物理弱化和化学弱化两个方面。
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| 关 键 词： | N2红黏土 物理力学性质 水稳性机理 粒度 矿物成分 微结构 软化 |
| 收稿时间： | 2021-02-05 |
Test Study on Mechanism of Water Stability of N2 Laterite |
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| Abstract: | Relying on a railway tunnel going across the stratum of N2 laterite, the basic physical properties of N2 laterite were analyzed. By means of compression deformation and shear strength tests, the water stability thereof was studied so as to reveal the change law of its deformation and strength characteristics before and after water immersion. The water variation mechanism of N2 laterite was analyzed by means of grain size analysis, X-RAY diffraction analysis and scanning electron microscope. The result shows that water is the most important factor leading to the change of physical and mechanical properties of N2 laterite, and the mechanism of water stability is presented by physical weakening and chemical weakening mainly. |
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