强夯施工引发的振动特性分析

Analysis on Vibration Characteristics Caused by Dynamic Consolidation Construction

强夯法是处理软弱地基和湿陷性黄土的常用方法，强夯法是在极短时间内对地基土体施加一个巨大的冲击能量，这种突然释放的巨大能量将使土体发生一系列的物理变化；如土体结构破坏或液化、排水固结压密、触变恢复等。其作用结果使一定范围内地基强度提高、孔隙挤密、消除湿陷性。同时，强夯施工过程中，会对强夯点附近的地区产生强烈的振动，这种振动属于有害振动，正确分析振动的特点和规律，可以有效避免强夯振动对周围建筑物的破坏，保护周围环境。

Dynamic consolidation is a commonly used way to deal with the soft soil ground and the collapsible loess,which exerts huge impact energy to the foundation soil mass that leads to a series of physical changes of the related soil mass as soil structural damage or liquefaction, drainage concretion and thixotropie recovery. It can improve the ground strength,extrude the pore and eliminate the collapsibility in a certain range. At the same time, it will produce strong vibration which is harmful near the compaction point area in the dynamic consolidation construction process. The correct analysis of the vibration features and laws can effectively avoid the damage of the surrounding buildings by the strong vibration and protect the surrounding environment.