The Study Status of the Impact of Heavy Axle ｌｏａｄ to Shakedown Theory for Road Pavements 

Dan LUO 

School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, CHINA 

Abstract: Not only have the number of heavy vehicles on the rapid growth, but also increases the ｌｏａｄ of the vehicle ，in the early the road to make use of already appeared on the ruts ，pits, cracks, subsidence and oth-er damage, leading to pavement life shortened it to cause great social and transport sector economic losses. This paper introduces the concept of shakedown theory, and reviews the research status at home and abroad by shakedown theory. Subgrade damage occurs by plastic creep shakedown behavior into the behavior of in-cremental collapse stage, and critical stress level is present between the two kinds of behavior. During the study, the common problems they face is how to define the timing of the subgrade soil destruction. 

Keywords: Heavy axle ｌｏａｄ; Subgrade soil; Shakedown theory; Timing of destruction