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针对低液限黏土湿软路基强度不足、易变形、稳定性差等问题,用石灰、水泥对路基填料进行改良,借助电子扫描电镜(SEM)从微观角度对加固机理进行证明,同时以室内击实特性、土的承载比(CBR)等指标对改良土的性能进行对比分析,发现:改良土改善了击实特性,即降低了最大干密度的同时增加了最佳含水率;CBR值增长明显,掺入4%的石灰或水泥即可增长到最初的近10倍,说明改良后的路基土吸水率降低,强度升高,对调节改善湿软路基填料起到积极的作用。
Aiming at the problems such as the low strength, easy deformation and poor stability of low soft soil embankment with low liquid limit clay, the subgrade filling is improved by using lime and cement, and the reinforcement mechanism is proved from the microscopic point by means of electronic scanning electron microscope (SEM) The results showed that the improved soil improved the compaction characteristics, that is, the maximum dry density was reduced and the optimum moisture content was increased at the same time. The CBR value increased obviously, Incorporation of 4% lime or cement can be increased to nearly 10 times the initial, indicating that the improved subgrade soil water absorption decreased, the intensity increased, to regulate and improve wet soft fill play a positive role.