| 膨胀土的循环胀缩特性试验研究 |
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| 引用本文： | 查甫生,崔可锐,刘松玉,杜延军,吴燕开. 膨胀土的循环胀缩特性试验研究[J]. 合肥工业大学学报(自然科学版), 2009, 32(3) |
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| 作者姓名： | 查甫生 崔可锐 刘松玉 杜延军 吴燕开 |
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| 作者单位： | 合肥工业大学,资源与环境工程学院,安徽,合肥,230009;东南大学,岩土工程研究所,江苏,南京,210096;合肥工业大学,资源与环境工程学院,安徽,合肥,230009;东南大学,岩土工程研究所,江苏,南京,210096;山东科技大学,土木建筑学院,山东,青岛,266510 |
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| 基金项目： | 国家自然科学基金，合肥工业大学博士学位专项基金 |
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| 摘 要： | 膨胀土分布的大多数地区气候都存在明显的干湿循环特征.这种气候的干湿循环会引起膨胀土含水量的变化,导致膨胀土发生胀缩循环效应.文章主要研究了合肥膨胀土的胀缩循环特性,试验结果表明,土样经过一个膨胀-干缩循环后再回到初始含水量点,土样的高度有所增加,不再是未膨胀前的高度,即膨胀与收缩并非是可逆的;膨胀土经过循环胀缩作用后,土体的胀缩性减弱,其抗吸水与抗失水的能力也随之下降;土的微结构变化主要集中在前几级循环胀缩过程中.
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| 关 键 词： | 膨胀土 胀缩循环 微结构 |
Experimental study on cyclic swell-shrink behavior of expansive soils |
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| ZHA Fu-sheng,CUI Ke-rui,LIU Song-yu,DU Yan-jun,WU Yan-kai. Experimental study on cyclic swell-shrink behavior of expansive soils[J]. Journal of Hefei University of Technology(Natural Science), 2009, 32(3) |
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| Authors: | ZHA Fu-sheng CUI Ke-rui LIU Song-yu DU Yan-jun WU Yan-kai |
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| Affiliation: | 1.School of Resources and Environmental Engineering;Hefei University of Technology;Hefei 230009;China;2.Institute of Geotechnical Engineering;Southeast University;Nanjing 210096;3.College of Civil Engineering and Architecture;Shandong University of Science and Technology;Qingdao 266510;China |
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| Abstract: | Expansive soils occur in climatic zones characterized by alternate wet and dry seasons.The expansive soils experience periodic swelling and shrinkage during the alternate wet and dry seasons.This paper investigates the effect of cyclic wetting and drying on the expansive characteristics of compacted expansive soils in Hefei.The test results show that after each cycle,the height of the soil sample increased.This indicates that the swell-shrink behavior of expansive soils are not completely reversible.The rel... |
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| Keywords: | expansive soil swell-shrink cycle microstructure |
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