Study On The Application Of Dynamic Compaction In Collapsible Loess Foundation Reinforcement

Dynamic consolidation method is also known as dynamic compaction.in the late 60s in the 20th century,Menard France that lay a solid foundation in the heavy hammer to create a dynamic method of strengthening the foundation. It uses Lifting devices from 8-40 tons of the hammer lifting 8-40 m in height, to free fall, an enormous impact energy (typically 1100～4000 kN·m, up to 8000 kN·m) acting on foundation, to the foundation in order to shock and vibration, Thus in a certain range so that the foundation of the strength increase, decrease compression to improve the mechanical properties of the foundation. After decades of application, prove that the method applicability, a significant strengthening effect.Dynamic consolidation by ramming the huge hammer tamping energy to soil compaction, soil reinforcement to achieve the purpose. According to the soil particles in particle size, porosity, moisture content, can be divided into the reinforcement:dynamic compacting, dynamic consolidation, three dynamic substitution. Apart from the nature of the soil beyond the depth of reinforcement and reinforcement effect is also related to the consolidation of different depths can be different tamping effect, this article in accordance with the application of tamping method was tamping depth formula. Tamping energy is not the bigger the better, if we can choose the best tamping energy will be effective and efficient. In the same piece of ground, ramming jidian not better, nor is it the more dense the better, an appropriate tapping, tapping pitch, pound passes, tamping intermittent time can make certain tapping energy to maximum effect of tapping.This article according to dynamic application instance of Xi'an xianyang international airport, illustrates the compaction of the order of construction, construction methods, quality assurance measures, security protection measures and the consolidation of the completion of detection method. Discusses in detail the advantages of dynamic consolidation, scope, and the compaction effect, to the promotion of dynamic compaction for later use to make some contribution.