强夯法的动力接触分析

Dynamic contact analysis of dynamic consolidation

在强夯法加固地基机理的分析中,夯锤底部与地基表面的动接触应力计算是关键技术问题。采用动力接触有限元法分析强夯中夯锤对地基土的冲击碰撞过程,建立动接触力与速度之间的接触关系式。对一具体算例进行了强夯动力接触分析,得到了夯沉量及动接触力在强夯作用时间内的变化规律,为精确模拟分析强夯加固机理提供了有效途径。

In the mechanism analysis of consolidation of foundation soil by heavy tamping method, the dynamic contact stress calculation of hammer bottom and foundation surface is the key technical problem. Uses dynamic contact FEM to analyze impact and collision of hammer to foundation soil in the dynamic compaction, establishes the contact relation between dynamic contact force and speed. With a practical example analyzed by dynamic contact method of dynamic consolidation, the change rule of between contact displace and the dynamic contact force during dynamic consolidation is obtained, and an effective path to simulate and analyze consolidation mechanism accurately is offered.