强夯振动效应研究  

Study on the Vibration Effect of Dynamic Compaction

作　　者：韩云山[1] 段伟[1] 安明 杨印旺 耿少波[1] 秦伟华[1] 苏航州 

机构地区：[1]中北大学土木工程系,山西太原030051 [2]山西机械化建设集团公司,山西太原030009 [3]长安大学公路学院,陕西西安710064

出　　处：《施工技术》2015年第5期111-116,共6页Construction Technology

基　　金：国家自然科学基金项目(51208473;51408558);山西省科技攻关项目(20130313010-3)

摘　　要：以真实工程场地为研究对象,通过现场强夯振动监测,对比了有无隔振沟强夯振动对周围建筑物的影响,得出建筑上部结构对夯击振动存在2倍以上放大效应结果。研究了自由场地地面振动速度随距离的衰减规律,分析了强夯能级、测点与夯点的距离等因素对地面振动波传播规律的影响;通过频谱分析,得出衰减指数可用频率的3次多项式拟合规律,计算出介质作用函数和强夯激励函数;并建立岩土体的物理力学性质和动力学特性关系。Based on real engineering site, through the monitoring of on-site dynamic compaction vibration, this paper shows that the upper structure of the building has 2 times magnification effects on tamping vibration by comparing the presence with the absence of isolation trench dynamic compaction vibration affecting surrounding buildings. The law of the free field ground vibration velocity decaying with distance is studied. Moreover, this paper analyze∽ the influence of dynamic compaction level, the distance between the test point and tamping point on ground vibration wave propagation. Through the spectrum analysis, this paper concludes that the cubic polynomials of the frequency can fit decay exponential, and this paper can calculate the medium effecting function and impelling function of dynamic compaction. The relationship between the physical mechanics properties of rock and soil and dynamic characteristics is established.

关 键 词：地基 强夯 隔振沟 振动效应 衰减规律 

分 类 号：TU472[建筑科学—结构工程]