强夯法对既有涵洞稳定性的影响

Influence of dynamic compaction method on stability of culvert

为研究强夯荷载作用下涵洞的应力分布和安全性,采用ABAQUS有限元软件对强夯加固路堤时的不同工况进行模拟分析。结果显示,强夯荷载对涵洞的应力分布产生较为明显的影响。强夯荷载作用下涵洞的最大Mises应力分布在靠近夯击位置的拐角处。涵洞最大拉应力会在夯击3-5次之后达到峰值,随后趋于稳定。

In order to study the stress distribution and safety of culvert under the action of dynamic compaction load,this paper used ABAQUS finite element software to simulate and analyze the different working conditions of embankment strengthened by dynamic compaction.The results show that the dynamic compaction load has an obvious influence on the stress distribution of culvert.Under the action of dynamic compaction,the maximum Mises stress distribution of culvert under dynamic compaction load is distributed at the corner of the culvert near the tamping position.The maximum tensile stress of culvert will reach the peak value after 3~5 times of tamping,and then tends to be stable.