车辆荷载作用下季冻土路基永久变形研究综述

结合我国季冻土和高速公路分布状况,对重载、超载车辆对季冻土路基造成的危害及致灾机理进行了初步分析.为准确描述重载、超载车辆行驶过程中对路基的作用效果,提出了冲击型荷载的概念.从冻融循环作用对土力学性能影响研究、车辆荷载下路面路基动力响应研究和动荷载下路基永久变形研究3个方面,分析、探讨了季冻土路基在车辆荷载作用下永久变形相关研究成果及发展趋势.

The Review on Permanent Deformation of Seasonal Frozen Soil Subgrade under the Action of Vehicle Load

In combination with distribution of seasonal frozen soil and the highway in our country,we analyze the damage of seasonal frozen soil subgrade and its disaster-causing mechanism under the action of heavy load and overload vehicles preliminarily.In order to accurately describe the effects of heavy traffic and overload vehicles in the course of driving for the subgrade,we put forward the concept of impact load.From the three aspects of the research on the effect of freeze-thaw cycle for the performance of soil mechanics,the research on the dynamic response of pavement and subgrade under automobile load,and the research on the permanent deformation of subgrade under dynamic load,we analyze and discuss related research results and development trend on permanent deformation of subgrade in the seasonal frozen soil area under vehicle load.