Dynamic Response of Embankment in Permafrost Regions under Traffic Load

Frost heave and frost boiling is a complicated interaction course between heat and force on embankment under traffic loading in seasonally frozen ground regions,and is also an engineering problem which is badly in need of solving.Heat transfer theory and Biot consolidation theory are applied to develop dynamic analysis model for embankment in seasonally frozen ground regions.Taking a typical embankment as an example,the characteristics of the dynamic response were calculated and analyzed for an embankment before and after engineering handling.The research conclusions indicate:1)A block of high temperature frozen ground takes place inside the embankment,where ground mechanical property becomes unstable;2)In the operation life cycle,when traffic load drive into or depart from the calculating cross-section,acceleration,velocity,displacement,stress and pore water pressure inside the embankment vibrate severely.However,comparing with ordinary embankment,the vibration and shock due to motor vehicle dynamic load are greatly weakened by the macadam inside the embankment of preventing frost heaving pumping;3)Pore water pressure inside the embankment of preventing frost heaving pumping decreases,as compared with ordinary embankment,with a maximum reducing extent of 31.4%.Thus,it greatly brings about delaying or eliminating embankment disease.The conclusions are useful for disease controlling and theoretical research.