| 胀缩性特殊土填筑路基石灰改性特性对比分析 |
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| 引用本文： | 刘辉.胀缩性特殊土填筑路基石灰改性特性对比分析[J].建筑技术,2012,43(9):830-833. |
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| 作者姓名： | 刘辉 |
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| 作者单位： | 河南中原高速公路股份有限公司,450052,郑州 |
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| 摘 要： | 红粘土和膨胀土均具有胀缩性、裂隙性等类似性质,属特殊土,用做路基填料时需符合现行规范要求.击实试验和CBR试验结果表明,当素土不能满足路基填筑要求时,石灰改性可改善土体胀缩性和承载能力指标.分析试验数据发现,填筑含水率宜控制在最佳含水率3.0％范围内,施工中需采取合理的搅拌和检测措施,以保证红粘土和膨胀土石灰改性后的路基处置效果.
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| 关 键 词： | 红粘土 膨胀土 胀缩性 石灰改性 |
COMPARATIVE ANALYSIS OF LIME MODIFICATION CHARACTERISTIC ON SWELL-SHRINKING SPECIAL SOIL FOR SUBGRADE FILLING |
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| LIU Hui.COMPARATIVE ANALYSIS OF LIME MODIFICATION CHARACTERISTIC ON SWELL-SHRINKING SPECIAL SOIL FOR SUBGRADE FILLING[J].Architecture Technology,2012,43(9):830-833. |
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| Authors: | LIU Hui |
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| Affiliation: | LIU Hui (He＇nan Zhongyuan Expressway Co.,Ltd., 450052, Zhengzhou, China) |
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| Abstract: | Laterite soil and expansive soil, which belong to special soil, both perform the swell-shrinking and fracture behaviors. It must fit the code for subgrade filling. Through the compaction and CBR test, lime modification may improve the swell-shrinking and bearing index. From the experimental data, filling moisture content should be 3.0% more than optimum moisture content. The proper mix and detection methods must be used to ensure the subgrade disposition quality of lime exoansive soil and lime laterite. |
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| Keywords: | laterite expansive soil swell-shrinking property lime modification |
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