| Dynamic consolidation has been widely used in practical engineering, however because of its theories is immature, mechanism and rule have not gotted the exact solution. In the actual detection, it is more difficult,and it is always the focus in the engineering. Cohesionless soil roadbed is owe to poor consolidation foundation.The highway in cohesionless soil area can cause deformation of roadbed and lead to serious diseases of subgrade, which is due to the uneven settlement of foundation. However dynamic stress propagation law of cohesionless soil did not have the essence of research.Q-L Expressway of cohesionless soil roadbed is dynamiced through the dynamic compaction method and analyzed by FLAC3D analysis software. This article analyzed the stress propagation through field test and FLAC3D analysis software. Based on the principle of dynamic compaction, compaction energy transfer mechanism, imperfect elastic collision characteristics and other characteristics, experimental data are gotted in this article.The data of the vertical and horizontal directions of propagation of dynamic stress are analyzed. The dynamic model is established by FLAC3D numerical simulation software.The dynamic propagation of dynamic compaction is simulated numerically, the numerical results are analyzed and compared with the test to illustrate the correctness of the theoretical analysis and the reliability of simulation results, and the semi empirical formule are obtained based on experimental data.The effective reinforcement depth is obtained visually in the different compaction energy function. The article provides references of similar engineering value for the application of dynamic compaction method, The article provides a new analysis method for the development of related disciplines in engineering application. |
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