客运专线黄土路基填料石灰改良试验研究

Experimental Study on Lime Improved Loess for Roadbed Filling of Passenger Special Lines

基于高速铁路对路基强度和工后沉降的严格要求,路基填料改良已成为黄土地区修建客运专线必须解决的关键技术问题。通过大量土工试验及理论分析,研究不同配合比下石灰改良黄土的物理力学性质、击实特性、压缩特性、强度特性及主要影响因素,确定出最佳石灰配合比,为黄土地区客运专线路基填料的选择和应用提供了参考依据。

Since high-speed railways have strict requirements to roadbed strength and post-construction settlement, improving roadbed filling has become the key technical problem to be solved in respect of passenger special lines built in loess area. Through many soil laboratory and theory analysis, with the different ratio of lime improved Loess, the physical and mechanical properties, compressibility, strength characteristics and the main influence factors are studied. Finally, the best lime mixture ratio is determined. This gives reference to choice and application of roadbed filling for passenger special lines in the loess region.