Detection of Underground Obstacles by SASW Method—Numerical Aspects

Ganji, Vahid; Gucunski, Nenad; Maher, Ali

doi:10.1061/(asce)1090-0241(1997)123:3(212)

Cited by 60 publications

(26 citation statements)

References 6 publications

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“…The spectral analysis of surface wave (SASW) method has been used for site investigation for several decades (e.g., Nazarian et al, 1983;Al-Hunaidi, 1992;Stokoe et al, 1994;Tokimatsu, 1995;Ganji et al, 1997). SASW method uses the spectral analysis of a surface wave generated by an impulsive source and recorded by a pair of receivers.…”

Section: Introductionmentioning

confidence: 99%

Quantitative estimation of minimum offset for multichannel surface-wave survey with actively exciting source

Xia

Miller

2006

Journal of Applied Geophysics

125

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Section: Introductionmentioning

confidence: 99%

Quantitative estimation of minimum offset for multichannel surface-wave survey with actively exciting source

Xia

Miller

2006

Journal of Applied Geophysics

125

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“…In general, the scattering coefficient will vary with frequency and depend on the size and shape of the object, its depth, and the orientation of the line over the object along which data are collected. The receiver spacing affects the phase velocity fluctuations via the competing terms in the denominator of the expression in equation (4). Figure 5 shows that the phase velocity fluctuations decrease substantially when the receiver spacing is increased from 5 cm (figure 4) to 20 cm (figure 5).…”

Section: Va-491-050-trmentioning

confidence: 99%

“…The application of SASW techniques to detection and classification of buried objects has evolved from the results of numerical simulations of the SASW method [4]. The numerical studies were conducted on finite element models of a soil stratum with obstacles of various sizes, shapes and densities (buried objects and cavities).…”

Section: Introductionmentioning

confidence: 99%

Novel Acoustic Technique for UXO Discrimination

Bell¹,

Gucunski²

2001

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“…There are various methods such as spectral analysis of surface wave (SASW), multichannel analysis of surface wave (MASW), cross hole, up and down-hole tests available to obtain the Vs profiles in the field. The SASW method used two receiver geophones (Nazarian et al 1983(Nazarian et al , 1992Stokoe et al 1994;Ganji et al 1997), whereas MASW used 24 geophones. Both MASW and SASW methods are non-destructive and low strain method, however MASW is an advanced technique (Park & Elrick 1998;Park et al , 2002Xia et al 1999;Zhang et al 2004;Xu et al 2006) to obtain Vs profiles more accurately and less time-consuming method.…”

Section: Site Classmentioning

confidence: 99%

Site specific design response spectrum proposed for the capital city of Agartala, Tripura

Sil

Sitharam

2015

Geomatics, Natural Hazards and Risk

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The design response spectrum is smooth in shape compared to other response spectra. The objective of design spectra is to estimate the possible earthquake lateral loads which may experience on a particular structure during its design life. In this study, an attempt has been made to develop, design response spectra for the Agartala city, Tripura which is one of the North Eastern states in India considered at the highest level of seismic activity in the country having a zone factor 0.36g as per Indian seismic code (BIS 1893(BIS -2002. Based on the present data set collected from 1731-2011, the region is characterized and the seismicity parameters estimated separately for each source zone by Gutenberg and Richter (G-R) relationship. The two ground motion models were used for the hazard prediction. However, hazard curve, and uniform hazard response spectra (UHRS) (2% and 10% probability level for 50 years) has been developed for the Agartala at seismic bedrock level condition. Further, the NEHRP (National Earthquake Hazards Reduction Program) site classes D and E-types have been identified based on the average shear wave velocity at an upper 30 m depth of the subsurface soil profile. The direct shear wave velocity profiles were obtained through multi channel analysis of surface wave tests conducted at 27 locations at Agartala city. The design response spectra have been developed at the surface level for both the site classes. The results could be used as direct inputs for earthquake resistant design of civil engineering infrastructures of the study area.

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Detection of Underground Obstacles by SASW Method—Numerical Aspects

Cited by 60 publications

References 6 publications

Quantitative estimation of minimum offset for multichannel surface-wave survey with actively exciting source

Quantitative estimation of minimum offset for multichannel surface-wave survey with actively exciting source

Novel Acoustic Technique for UXO Discrimination

Site specific design response spectrum proposed for the capital city of Agartala, Tripura

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