| 氯离子侵蚀筑坝红土的试验研究 |
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| 引用本文： | 李晋豫,杨华舒,陈刚,殷小林,邵洛. 氯离子侵蚀筑坝红土的试验研究[J]. 水电能源科学, 2012, 30(1): 162-164,176 |
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| 作者姓名： | 李晋豫 杨华舒 陈刚 殷小林 邵洛 |
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| 作者单位： | 1. 昆明理工大学电力工程学院,云南昆明,650051
2. 淄博黄河河务局,山东淄博,255000 |
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| 基金项目： | 国家自然科学基金资助项目（50869003，51069003）；昆明理工大学精品课程基金资助项目（10968137） |
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| 摘 要： | 为探索氯离子对红土坝料的破坏机理,设计了化学加速试验,比较了全渗液中铁、铝离子浓度及土样粘粒含量的变化,并分析了土样的微观结构图。试验结果表明,氯离子与筑坝红土中起胶结作用的铁、铝氧化物发生缓慢而长期的化学反应,生成的可溶盐随渗透水流失,降低了红土中胶结物的含量,破坏了红土的结构,进而在坝体内产生了细观渗透通道,降低了土石坝的可靠性和运行寿命。
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| 关 键 词： | 氯离子 侵蚀 筑坝 红土 化学反应 加速试验 |
Experimental Study on Erosion of Chloride Ions to Laterite of Dam Construction |
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| LI Jinyu,YANG Huashu,CHEN Gang,YIN Xiaolin and SHAO Luo. Experimental Study on Erosion of Chloride Ions to Laterite of Dam Construction[J]. International Journal Hydroelectric Energy, 2012, 30(1): 162-164,176 |
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| Authors: | LI Jinyu YANG Huashu CHEN Gang YIN Xiaolin SHAO Luo |
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| Affiliation: | 1.Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650051, China;2.Zibo Yellow River Affair Bureau,Zibo 255000,China) |
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| Abstract: | In order to acquire the damage mechanism of laterite dam material under erosion of chloride ions, the chemical accelerated test is designed. The change of iron ion concentration as well as aluminum ion concentration in liquid after permeability test and clay content of soil samples are compared. And the microstructure images of soil samples are analyzed. The results show that the chemical reaction occurs among chloride ion and iron and aluminum oxides, which play a role as cementation in dam construction laterite; the soluble salt are produced and carried away with seepage water. As a result, the content of cement in laterite decreases and the structure of laterite are damaged. Therefore, leakage channels appear in the dam body, which reduces the reliability and operation life of the earth-rockfill dam. |
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| Keywords: | chloride ion erosion dam construction laterite chemical reaction accelerated test |
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