Frequency-Bessel Transform Based Microtremor Survey Method and Its Engineering Application

You, Zhenyu; Xu, Pingwei; Qian, Jing; Cao, Lianpeng; Du, Yanan; Fu, Qiang

doi:10.3390/ijerph192013484

Cited by 4 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the benefits of being S-wave velocity structure and the underground geotechnical medium can be obtained using inversion or conversion with dispersion curve [6,7]. Due to the benefits of being rapid, ecologically friendly, devoid of electromagnetic interference, and having no artificial seismic source, the microtremor survey is crucial to urban subterranean surveys [8]. The extraction of the dispersion curve is the vital stage in the microtremor survey.…”

Section: Introductionmentioning

confidence: 99%

Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

et al. 2023

View full text Add to dashboard Cite

Site velocity structure determination and stratigraphic division are important purposes of microtremor survey, and the precision of dispersion curves is an important factor affecting the accuracy of microtremor survey. In order to obtain more accurate dispersion curve and S-wave velocity structure, this paper proposed a dispersion curve processing method based on hierarchical frequency fusion of seismic interferometry. Analysis was performed on the link between station pair spacing and frequency component of the collected microtremor signal dependability and exploration depth. A mathematical model of station distances and reliable frequencies of the dispersion curves were achieved through a hierarchical relationship between station distances. Then, a fusion criterion was proposed to determine the fusion boundary based on the reliable frequency, and the dispersion curves of station pairs with different distances were fused to obtain the final dispersion curve. Finally, a more accurate velocity structure was obtained through s-wave velocity conversion from shallow layers to deep ones. The method was applied to the microtremor survey of the proposed high-rise building site in Xiamen. The rectangular observation array was arranged, and the dispersion curves were extracted and processed using hierarchical frequency fusion and traditional superimposed averaging method, and the S-wave velocity and stratigraphic structure were obtained. The experimental results show that the S-wave velocity and stratigraphic structure obtained using the hierarchical frequency fusion method are in better agreement with the borehole results than the superimposed averaging method, which shows its effectiveness and application prospect.

show abstract

Section: Introductionmentioning

confidence: 99%

Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

et al. 2023

View full text Add to dashboard Cite

show abstract

An Automatic Screening Method for the Passive Surface-Wave Imaging Based on the F–K Domain Energy Characteristics

Wu,

Pan,

et al. 2023

IEEE Trans. Geosci. Remote Sensing

View full text Add to dashboard Cite

Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms

Liu

Chen

Gao

et al. 2023

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

The frequency–Bessel transform (F–J) method, which can reliably provide multimodal surface-wave dispersion spectrograms from recorded ambient noise, has been applied in many studies of the earth’s velocity structure. However, extracting dispersion curves and determining their roots can be challenging. To circumvent these challenges, we present a new, objective spectrum inversion scheme for multimodal dispersion spectrograms. In our new method, the image dissimilarity between the observed dispersion spectrogram and the synthetic kernel spectrum of Green’s function is directly minimized to invert the subsurface velocity structure by a quasi-Newton method. During the spectrum inversion, Green’s kernel spectrum and its derivatives are efficiently calculated by the generalized reflection and transmission coefficient method. Thus, we can rapidly perform structure inversion for multimodal dispersion spectrograms. Finally, the reliability and practicality of the new method are validated by synthetic and field applications, respectively.

show abstract

Frequency-Bessel Transform Based Microtremor Survey Method and Its Engineering Application

Cited by 4 publications

References 24 publications

Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

An Automatic Screening Method for the Passive Surface-Wave Imaging Based on the F–K Domain Energy Characteristics

Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms

Contact Info

Product

Resources

About