重复加载下路基填土的临界动应力和永久变形初探

Study of the Critical Dynamic Stress and Permanent Strain of the Subgrade-Soil under the Repeated Load

本文针对路基填土在列车荷载重复作用下产生永久变形的问题，利用动三轴试验，研究了重复加载条件下，土体的临界动应力和永久应变随加载次数、加载频率和周围压力变化的规律，对高速铁路和重载铁路路基设计有重要的参考价值．

The Permanent deformation of subcode soil under reacted wheel-loading is analyzed by the repeated loading triaxial tot. The vacation of the critical dyllamic stress of subgrade-soil with the change of the loading frequency and the confining stress are studied. The conclusions are siginificant to the design of the subgtade or fotmation of high- speed railways and heavy-haul railways.