Analysis on three-dimensional stress distribution in subgrade during the vibrating compaction

Study on stress distribution in subgrade during the vibrating compaction process is of great value to find out the compaction mechanism. in order to study the three-dimensional distribution characteristics of stress in subgrade,the basic kinetic equation of subgrade compaction system is derived by using the finite element method. next,the physical model of “vibratory roller-subgrade” system is established. then,the threedimensional stress distribution in subgrade is simulated by comsol multiphysics. the numerical results are reliable,since they are in accordance with the test results and are consistent with the theory of the vibrating compaction in road construction. the simulation results are as follows: first,the compaction stress decreases gradually from the upper to the lower layer of the subgrade. second,along the width direction,the stress has maximum value in the middle area,but decreases symmetrically towards both sides of the roller. © 2017 just. all rights reserved.