| 干湿循环对膨胀土变形指标的影响 |
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| 引用本文： | 赵艳林,曾召田,吕海波.干湿循环对膨胀土变形指标的影响[J].桂林工学院学报,2009,29(4):470-473. |
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| 作者姓名： | 赵艳林 曾召田 吕海波 |
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| 作者单位： | 1. 桂林理工大学,土木与建筑工程学院,广西,桂林,541004;广西大学,土木与建筑工程学院,南宁,530004;广西大学,防灾减灾研究所,南宁,530004
2. 广西大学,土木与建筑工程学院,南宁,530004;广西大学,防灾减灾研究所,南宁,530004南宁铁路局,科学技术研究所,广西,柳州,545007 |
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| 基金项目： | 国家自然科学基金，广西科技开发项目，广西水利厅科技专项项目 |
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| 摘 要： | 对经历室内干湿循环后的膨胀土进行胀缩性试验，研究了胀缩变形指标的变化规律，结果表明：除缩限外，其余胀缩性指标随干湿循环次数的增加发生衰减，前1～3次循环时衰减速度较快，此后逐渐趋于一稳定值，循环次数与胀缩性指标可用指数关系拟合，缩限在干湿循环过程中不发生变化。
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| 关 键 词： | 膨胀土 干湿循环 变形指标 |
Wetting-Drying Cycle Influence on Expansive Soil Deformation |
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| ZHAO Yan-lin,ZENG Zhao-tian,LU Hai-bo.Wetting-Drying Cycle Influence on Expansive Soil Deformation[J].Journal of Guilin University of Technology,2009,29(4):470-473. |
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| Authors: | ZHAO Yan-lin ZENG Zhao-tian LU Hai-bo |
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| Affiliation: | ZHAO Yan-lin ZENG Zhao-tian LU Hai-bo ( 1. College of Civil Engineering, Guilin University of Technology, Guilin 541004, China; 2. a. School of Civil Engineering and Architecture, b. Research Institute of Preventing and Mitigating Disasters, Guangxi University, Nanning 530004, China; 3. Railway Research Institute of Science and Technology, Nanning Railway administration, Liuzhou 545007, China) |
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| Abstract: | Laboratory tests study change of swell-shrink properties of expansive soil in wetting-drying cycle and swell-shrink indices are calculated.It is shown that well-shrink indices except the shrinkage limit of expansive soil obviously decrease at the beginning of 1 to 3 wetting-drying cycles,and then tend to stable values.But the shrinkage limit maintains constant after wetting-drying cycles.The relationship between swell-shrink indices and wetting-drying cycle times can be fitted by exponential equation. |
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| Keywords: | expansive soils wetting-drying cycle deformation indices |
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