Calculation of dispersion curve by combined cross-spectrum and phase shift method and its application to evaluate compactness of subgrade

摘要：

It is important to evaluate the compactness of subgrade of expressway,which greatly affects the travelling safety on the expressway.It is advantageous for Rayleigh Wave to detect the compactness of the subgrade rapidly,continuously and nondestructively.It can restrict phase velocity using the phase-shift method in the calculation of frequency dispersion curve with cross-spectrum method.The algorithm can overcomes the failure to calculate the phase velocity using the cross-spectrum method in low frequency especially.The calculation of theoretical model indicates that the combination of these two methods can improve the detection precision transversally and vertically.It will be helpful for obtaining relatively better effects in the detection of the compactness of the subgrade of the expressway.

关键词： phase-shift method cross-spectrum method Rayleigh wave compactness

作者: Dazhou Zhang Zhangqiang Xiong Hanming Gu

作者单位: Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China School of Info-physics and Geomatics Engineering,Central South University,Changsha,410083,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Environmental and Engineering Geophysics(第三届环境与工程地球物理国际会议)

会议地点: 武汉

会议语种:英文

页码: 174-177

在线出版日期: 2008-06-15（万方平台首次上网日期，不代表论文的发表时间）