低液限粉土的力学性能改善及试验分析  

Experimental Analysis on Mechanical Properties Improvement of Low Liquid Limit Silt

作　　者：崔伟[1] 吕高航 刘春阳 CUI Wei;Lv Gao-hang;LIU Chun-yang(Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]山东大学岩土与结构工程研究中心,济南250061

出　　处：《科学技术与工程》2018年第8期302-306,共5页Science Technology and Engineering

摘　　要：低液限粉土较一般土质粒径集中级配差,孔隙率大,毛细作用剧烈若直接用作路基填土会导致路基难以压实,强度低,水稳定性差,对路基造成极大的危害。根据相关的室内试验对低液限粉土特性进行分析,通过在低液限粉土掺入一定配比的改性加固材料如石灰、水泥、水玻璃、黏土等改善低液限粉土的物理特征,提高强度。试验证明掺入水泥和水玻璃能有效提高低液限粉土强度,水泥提高效果增幅较小,掺入小比例的水玻璃可以大幅提高粉土的强度。The low-liquid-limited silty soil is more concentrated than the average soil particle size,and the porosity is large.If the filling effect is strong,it is difficult to compute the roadbed,and the strength is low and the water stability is poor.According to the relevant indoor test,the characteristics of low-liquid-limited silt were analyzed.By adding a certain proportion of modified reinforcing materials such as lime,cement,water glass,clay and so on in low liquid limit silt to improve the physical characteristics and the strength.Experiments show that the incorporation of cement and water glass can effectively improve the strength of low liquid limit silt,cement increase effect is relatively small,mixed with a small proportion of water glass can greatly improve the strength of silt.

关 键 词：低液限粉土 土质改性 无侧限抗压强度 加固材料 

分 类 号：U416.1[交通运输工程—道路与铁道工程]