客运专线铁路对路基变形提出了严格要求,填料改良已经成为客运专线铁路必须解决的问题。研究以动强度为控制条件,以静强度为判别标准的改良土的设计思想,分析了水泥、石灰改良土的特点和使用条件。 The Passenger Dedicated Railway has put forward strict requirements on the deformation of subgrade, and the improvement of packing has become a problem that must be solved by passenger dedicated railway. In this paper, the design idea of ​​modified soil with dynamic strength as control condition and static strength as criterion is studied. The characteristics and operating conditions of cement and lime-modified soil are analyzed.