Influence of Uneven Trace Spacing on Rayleigh Wave Dispersion

Rayleigh wave dispersion signals are significant to underground investigation.Tradition-ally,uniformed trace spacing is employed in surface wave surveys.In some cases,however,uneven trace spacing is often encountered because of the limitations of the site condition.In order to study the influence of...

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Bibliographic Details
Published in:Journal of earth science (Wuhan, China) China), 2011-04, Vol.22 (2), p.231-240
Main Author: 张双喜 李孟奎
Format: Article
Language:English
Subjects:
Biogeosciences
Construction
Data acquisition
Dispersion
Dispersions
Distortion
Earth and Environmental Science
Earth science
Earth Sciences
Geochemistry
Geology
Geotechnical Engineering & Applied Earth Sciences
Linear arrays
Nonuniformity
Rayleigh waves
Rayleigh波
Trace elements
Underground
Wave power
不均匀
地震检波器
弥散
瑞利波
跟踪测量
追踪间隔
间距
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Summary:Rayleigh wave dispersion signals are significant to underground investigation.Tradition-ally,uniformed trace spacing is employed in surface wave surveys.In some cases,however,uneven trace spacing is often encountered because of the limitations of the site condition.In order to study the influence of uneven trace spacing on the dispersion data construction of Rayleigh waves,data acquisi-tion is performed based on a 2.5D field layout with a linear array of geophones fixed and a mobile source.The observation direction controls the trace spacing of the measurement.The final results demonstrate that the trace nonuniformity has significant influence on the Rayleigh wave dispersion feature constructed.When the observation angle is over 45o,the dispersion image will be too distorted to extract dispersion data correctly.
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-011-0176-7