| 西南山区红粘土工程特性试验研究 |
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| 引用本文： | 王建收,李岩铭,王桂新,赵旭鹏.西南山区红粘土工程特性试验研究[J].路基工程,2013,0(6):97-101. |
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| 作者姓名： | 王建收 李岩铭 王桂新 赵旭鹏 |
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| 作者单位： | 青岛地质工程勘察院，山东青岛 266071 |
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| 摘 要： | 西南山区的红粘土问题突出，相应的工程技术问题复杂，难度大。为了合理选用地基处理方法及土石方填筑技术，要求先研究其力学性质。试验表明:①原状红粘土孔隙比大，压缩性不高；压力增加时，不同深度处的红粘土固结系数增大；天然快剪强度较高，体现了原状红粘土含水率高、孔隙比大、塑性强，但具有较高力学强度的特殊性质。② 扰动红粘土呈中压缩性；固结系数在400～800 kPa之间出现最大值；随着压实度增大，其渗透系数减小；饱和固结快剪试验中，内摩擦角随着压实度的提高而增大，三轴试验中，其剪切破坏一般发生在软弱面上，非饱和三
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| 关 键 词： | 红粘土，原状样，扰动样，力学特性 |
| 收稿时间： | 2019-11-10 |
Study on Engineering Behavior of Red Clay in Southwest Mountain Area Qingdao Geological Engineering Investigation Institute |
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| Authors: | WANG Jianshou LI Yanming WANG Guixin ZHAO Xupeng |
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| Affiliation: | (Qingdao Institute of Geologic Engineering Survey, Qingdao 266071, Shandong, China) |
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| Abstract: | The issues in relation to the red clay in the mountainous area in the southwest are outstanding, accordingly, the technical and engineering problems are complex and difficult. The proper use of foundation treatment method and earth-rock filling technology requires to study the mechanical properties of the red clay at first. The tests results show that： ①The undisturbed sample of the red clay has high porosity ratio and low compressibility; when the pressure increases, the consolidation coefficient of the red clay at different depth increases; its high natural shearing strength indicates the undisturbed red clay has high water content, large porosity ratio and high plasticity. ②The disturbed sample of the red clay has medium compressibility; the consolidation coefficient is maximum on condition of 400 - 800 kPa; as the compactness increases, its permeability coefficient decreases; in the test of saturated consolidation shearing, the internal friction angle increases with the increase of the compactness; in the triaxial test, shear failure generally arises on the weak plane; as well as in the unsaturated triaxial UU test, the cohesion increases significantly with the increase of the compactness and the compactness has minor effect on the internal friction angle, which indicates that the strength of disturbed red clay increases significantly with the change of unsaturated suction, and the water stability is so poor that the strength may decrease rapidly when the clay is immersed into water. |
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| Keywords: | red clay undisturbed sample disturbed sample mechanical properties |
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