| 高液限土最佳掺砂比的确定 |
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| 引用本文： | 程涛,洪宝宁,刘鑫,黄漫.高液限土最佳掺砂比的确定[J].西南交通大学学报,2012,47(4):580-585,596. |
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| 作者姓名： | 程涛 洪宝宁 刘鑫 黄漫 |
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| 作者单位： | 1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098;河海大学岩土工程研究所,江苏南京210098
2. 肥东城关中学,安徽肥东,231600 |
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| 基金项目： | 国家自然科学基金资助项目(51079052);广东省交通运输厅交通科技项目(200903005) |
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| 摘 要： | 为确定最佳掺砂比,按细颗粒含量、液限、素土的CBR值(加州承载比)分别对高液限土进行分类,按掺砂改良后CBR值为6分别确定不同分类高液限土最佳掺砂比的范围,再综合考虑这3种要素确定最佳掺砂量.试验结果表明:细颗粒含量对CBR值的影响大于液限和黏粉比;黏粉比越小,CBR值越大;广东云罗高速沿线高液限土的最佳掺砂比约为20%;不同性质高液限土应采取弃方、掺砂改良和直接填筑3种不同的处理方法.
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| 关 键 词： | 高液限土 掺砂改良 最佳掺砂比 加州承载比 |
Determination of Optimal Sand Content for Improving High Liquid Limit Soil |
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| CHENG Tao
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HONG Baoning
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LIU Xin
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HUANG Man.Determination of Optimal Sand Content for Improving High Liquid Limit Soil[J].Journal of Southwest Jiaotong University,2012,47(4):580-585,596. |
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| Authors: | CHENG Tao HONG Baoning LIU Xin HUANG Man |
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| Affiliation: | 1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;2.Geotechnical Research Institute,Hohai University,Nanjing 210098,China;3.Feidong Chengguan Middle School,Feidong 231600,China) |
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| Abstract: | In order to determine the optimal sand content,high liquid limit soils were classified respectively based on fine particle content,liquid limit and soil CBR(California bearing ratio) value,the range of the optimal sand content for different types of high liquid limit soils were ascertained.The classification standard is that CBR value of improved soils is equal to 6.The optimal sand content was determined by comprehensively considering the three different factors.The experimental result shows that compared with liquid limit and clay-silt ratio,the effect of fine particle content on CBR value is great.The CBR value decreases with the increase of clay-silt ratio.The optimal sand content of high liquid limit soil along Yunfu-Luoding expressway is about 20%.To high liquid limit soils with different properties,different treatment measures should be adopted. |
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| Keywords: | high liquid limit soil soil improvement with sand optimal sand content CBR (California bearing ratio) |
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