| 干湿循环下云南加砂红土物理力学特性研究 |
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| 引用本文： | 梁谏杰,张祖莲,邱观贵,袁强.干湿循环下云南加砂红土物理力学特性研究[J].水文地质工程地质,2017,0(5):100-100. |
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| 作者姓名： | 梁谏杰 张祖莲 邱观贵 袁强 |
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| 作者单位： | 昆明理工大学电力工程学院，云南 昆明650500 |
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| 基金项目： | 国家自然科学基金资助项目(51269006，51568031) |
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| 摘 要： | 针对不同加砂比例的云南红土，在相应最优含水率及最大干密度的初始条件下，采用土工试验与相关理论研究相结合的方法，运用Excel分析试验数据，揭示干湿循环作用与加砂红土物理力学特性变化之间的关系。结果表明:在干湿循环过程中，不同加砂比例的红土比重均呈先上升后下降的趋势，干密度均呈上升趋势，抗剪强度及抗剪强度参数均呈下降趋势，并最终都在循环10次左右趋于稳定。在干湿循环次数一定条件下，加砂比例越大的红土，其黏粒降幅越小，粉粒和砂粒增幅也越小，裂隙数量越少，土样越密实。抗剪强度及抗剪强度参数降幅最大的是加砂比例为15%的红土，降幅最小的是加砂比例为10%的红土。
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| 关 键 词： | 加砂红土 干湿循环 比重 干密度 抗剪强度 |
| 收稿时间： | 2016-11-05 |
| 修稿时间： | 2017-02-01 |
A study of physical and mechanical properties of sandy laterite under drying-wetting cycles in Yunnan |
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| LIANG Jianjie,ZHANG Zulian,QIU Guangui,YUAN Qiang.A study of physical and mechanical properties of sandy laterite under drying-wetting cycles in Yunnan[J].Hydrogeology and Engineering Geology,2017,0(5):100-100. |
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| Authors: | LIANG Jianjie ZHANG Zulian QIU Guangui YUAN Qiang |
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| Affiliation: | College of Electrical Engineering, Kunming University of Science and Technology, Kunming，Yunnan650500,China |
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| Abstract: | Considering the Yunnan laterite with different proportions of sand under the initial conditions of the optimum moisture content and the maximum dry density, this paper reveals the relationship between drying-wetting cycles and the changes in physical and mechanical properties of sandy laterite. On the basis of combining geotechnical tests with relevant theoretical researches, the method of Excel is used to analyze the test data. The results indicate that under the drying-wetting cycles, the specific gravity of laterite with different proportions of sand shows a trend from rise to decline; the dry density shows an upward tendency; the shear strength and shear strength parameters have an upward tendency. The tendency is eventually stable after 10 times of cycling. Under a certain number of dry and wet cycle conditions, the greater sanding proportion of laterite comes with the smaller decrease in clay particle. The smaller increase of particle and sand, the smaller numbers of cracks, and the soil samples are more compacted. The largest decline in shear strength and shear strength parameters is the laterite with 15% proportions of sand, and the smallest is the laterite with 10% proportions of sand. |
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