强夯振动主控因素研究  

Research on the Primary Controlling Factors of Vibration of Dynamic Compaction

作　　者：王鹏程[1] 刘建坤[1] 冯瑞玲[1] 

机构地区：[1]北京交通大学土木工程学院,北京100044

出　　处：《地下空间与工程学报》2015年第5期1282-1288,共7页Chinese Journal of Underground Space and Engineering

基　　金：国家基础研究计划973(2012CB026104);国家自然科学基金(41171064)

摘　　要：强夯施工过程中的剧烈振动会影响周围的居民以及建筑物,因此,必须充分考虑强夯振动的主要影响因素以确定合理的施工安全距离,基于某站场地基处理实际工程,建立了强夯施工的有限元模型,以强夯最后一击地表振动速度为评价指标,针对强夯的安全距离和振动的主要影响因素,结合敏感性分析方法,分析了多个相关因素对于安全距离的影响,结果表明土体的性质的影响更大,笔者认为在保证夯击效果的前提下,宜采用轻锤高落距的组合形式,可以在一定程度上减小强夯的振动影响。The vibration caused by dynamic compaction can seriously affect the buildings and residents nearby,it is necessary to analyze the main controlling factors to determine the safe construction distance of dynamic compaction. Based on practical construction, numerical model of dynamic compaction was established, taking vibration velocity of ground surface as evaluation index,main controlling factors were respectively studied. The results show that： compared with others factors the soil properties have a greater influence; for different combinations of hammer weight and dropping distance of same compaction energy,lighter hammer with higher drop distance could reduce the vibration effect to some extent.

关 键 词：强夯振动 主控因素 数值模拟 敏感性分析 

分 类 号：TU45[建筑科学—岩土工程]