声波透射法在基桩检测中的应用  

Application of crosshole sonic logging in pile foundation detection

作　　者：邓国文[1] 王齐仁[1] 化得钧[1] 张建[1] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《工程勘察》2013年第6期92-95,共4页Geotechnical Investigation & Surveying

基　　金：湖南省科技计划项目(2011SK3195)资助

摘　　要：声波在混凝土中传播时其声学参数与混凝土的密实程度存在着密切的关系,声时(声速)、幅度和波形等声学参数在不同介质中有较明显的差异,根据所采集到的声学参数的变化情况可以反映出混凝土中介质的变化情况,从而达到判断基桩完整性的目的。本文基于对工程桩实测成果的分析,结合钻孔取芯验证的结果,进一步证明,采用平测、交叉斜测和扇形扫测等透射方法可以有效地判定桩身混凝土中缺陷的性质和位置。There is a close relationship between the acoustic parameters and the concrete density in wave transmission in concrete. The acoustic parameters, such as sound speed, amplitude and waveform could be found obviously in different media. The media change in the concrete could be reflected based on the change of the acoustic parameters, and the pile integrity could be estimated subsequently. Based on the analysis of engineering pile test and concrete coring, the transmission methods such as planar synchronous, cross diagonal method and fan-shaped scan measurement could determine the nature and position of the defect effectively existing in the concrete piles.

关 键 词：声波透射法 缺陷 平测 交叉斜测 扇形扫测 

分 类 号：P631[天文地球—地质矿产勘探]