| 掺砂砾改良盐渍土路用性能的试验研究 |
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| 引用本文： | 陈中秋,黄骤屹,尹利华.掺砂砾改良盐渍土路用性能的试验研究[J].路基工程,2017,0(4):97-100. |
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| 作者姓名： | 陈中秋 黄骤屹 尹利华 |
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| 作者单位： | 1.中交云南高速公路发展有限公司, 昆明 650500 |
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| 摘 要： | 采用掺拌1:1砂砾对西宁南绕城高速公路中硫酸盐渍土进行改良，分析了砂砾改良前后盐渍土的微观结构，并分别采用振动压实和重型击实对改良弱盐渍土的压实效果进行分析。结果表明:砂砾能有效改善盐渍土的级配，增加颗粒间的摩阻力，使土的抗剪强度得到较大提高，同时增强土体的结构性；弱盐渍土采用振动法压实获得的干密度大于用重型击实获得的干密度，压实效果更好，工程中宜用振动压实法确定盐渍土的室内最大干密度。
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| 关 键 词： | 盐渍土 砂砾改良 压实特性 振动压实 重型击实 微观结构 |
| 收稿时间： | 2019-11-11 |
Experimental Study on Pavement Performance of Improved Saline Soil Mixed with Gravel |
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| Abstract: | By mixing 1:1 gravel with sulphate saline soil of Xining south ring expressway, it analyzed the microstructure of saline soil before and after the improvement and analyzed the compaction effect of the improved weak saline soil by vibrating compaction and heavy compaction. The results show that sand gravel can effectively improve the grading of saline soil and increase the friction between the particles, greatly increasing the soil shear strength and enhancing the structure of soil at the same time; the obtained dry density of weak saline soil with vibrating compaction method is greater than that with heavy compaction method, with better compaction effect. In the project, we should use vibrating compaction method to determine the interior maximum dry density of saline soil. |
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