| 滨海区盐渍土击实试验及溶陷特性改良研究 |
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| 引用本文： | 杨金龙,刘浩,邓彩军,杨庆港,杨展.滨海区盐渍土击实试验及溶陷特性改良研究[J].路基工程,2022,0(3):52-56. |
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| 作者姓名： | 杨金龙 刘浩 邓彩军 杨庆港 杨展 |
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| 作者单位： | 1.中交二航局五分公司，武汉 430014 |
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| 基金项目： | 国家自然科学基金面上项目（42177166） |
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| 摘 要： | 以河北沧州地区盐渍土为对象，研究无机改良材料生石灰、粉煤灰及水泥不同掺量配合比下改良盐渍土的击实及溶陷特性。结果表明:单掺生石灰时，掺量增加，氯盐盐渍土最优含水率增大，溶陷性减弱，当掺量超过8 %，对最优含水率的影响变小；在双掺生石灰和粉煤灰时，掺量增加，最优含水率增长率降低，最大干密度减小，生石灰掺量2 %～8 %时，溶陷性随掺量的增加而减弱，当生石灰掺量超过8 %时，溶陷性开始增大；在三掺条件下，最大干密度得到显著提升，溶陷性也有一定的减弱，当生石灰、粉煤灰和水泥掺量分别为3 %、3 %、4 %时，改良效果最佳。
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| 关 键 词： | 路基工程 滨海盐渍土 路基填料 击实试验 溶陷试验 |
| 收稿时间： | 2022-02-25 |
Study on Compaction Test and Collapsibility Improvement of Saline Soil in Coastal Area |
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| Abstract: | Taking the saline soil in Cangzhou area of Hebei province as the research object, the compaction and collapsibility characteristics of improved saline soil under different mixing ratios of inorganic modified materials quicklime, fly ash and cement were studied. The results show that when mixed with single-doped lime, the optimal water content of chlorinated saline soil increases with the increase of quicklime content, and the collapsibility weakens. When the quicklime content exceeds 8 %, the influence on the optimal water content becomes smaller. When mixed with double mixing quicklime and fly ash, the optimal water content growth rate of chlorinated saline soil decreases and the maximum dry density decreases with the increase of lime content. When the quicklime content is between 2 % ~8 %, the collapsibility decreases with the increase of quicklime content. When the content of quicklime exceeds 8 %, the collapsibility increases. Under the condition of mixing three kinds of materials, the maximum dry density has been significantly improved, and the collapsibility has also been weakened. When the quicklime, fly ash and cement content is 3 %, 3 % and 4 % respectively, the improvement effect is the best. |
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