Seismic Cpt to Measure in Situ Shear Wave Velocity

Robertson, P. K.; Campanella, Richard; Gillespie, D.; Rice, Anthony H.

doi:10.1061/(asce)0733-9410(1986)112:8(791)

Cited by 145 publications

(59 citation statements)

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“…The profile of shear wave velocity is obtained in a same manner as the seismic down-hole test. The receiver is located in the cone Campanella et al (1986), Robertson et al (1986), Baldi et al (1988), Campanella (1994), Kramer (1996), Mayne (2001), Frost and Burns (2003) In particular, pulse transmission method using piezoelectric transducers have been commonly used to monitor P-and S-wave propagation in many different types of geomaterials (Lawrence 1963, Sheeran et al 1967, Woods 1978, Yesiller et al 2000. In spite of its common use, such method has several shortcomings.…”

Section: Astm D 4428mentioning

confidence: 99%

Wave Propagation Methods for Determining Stiffness of Geomaterials

Sawangsuriya¹

2012

Wave Processes in Classical and New Solids

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Section: Astm D 4428mentioning

confidence: 99%

Wave Propagation Methods for Determining Stiffness of Geomaterials

Sawangsuriya¹

2012

Wave Processes in Classical and New Solids

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“…An acquisition scheme is shown in Figure 2. More information about this technique can be found in Robertson et al (1986) andde Lange (1991).…”

Section: Shear-wave Velocities From Offshore Brazil: Direct Measuremementioning

confidence: 99%

Sea-bottom shear-wave velocities and mode conversions

Rodriguez-Suarez¹

2005

Rev. Bras. Geof.

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ABSTRACT. Elastic parameters for shallow marine sediments were obtained from the literature (Hamilton (1976(Hamilton ( ,1979; Hovem et al. (1991); Esteves (1996)) and previously unpublished geotechnical data from offshore Brazil. The Brazilian data showed reasonable agreement with Hamilton's results except in the very shallow (above 10 m) sedimentary section. A second order equation to calculate VS as a function of depth in marine sediments is derived empirically down to a depth of 140 m.Analyses of transmission and reflection coefficients for compressional-and shear-wave energy mode conversion using Zoeppritz equations were performed for both the sea bottom and a typical hydrocarbon reservoir top of Tertiary age. It is concluded that most S-wave reflection data recorded on the ocean floor by OBC is related to upcoming energy converted at an interface at depth and not from a downgoing shear conversion at the ocean floor.It was also concluded that, using elastic assumptions, mode conversion (both P-to S-and S-to P-) of the up going energy is negligible in the shallow (above 160 m) sediments.Keywords: V S in marine sediments, mode conversion. (1976,1979); Hovem et al. (1991); Esteves (1996)) e dados geotécnicos marítimos inéditos do Brasil. Os dados brasileiros mostraram uma correlação razoável com os resultados de Hamilton exceto para a seção sedimentar muito rasa (acima de 10 m). Uma equação de segunda ordem para calcular V S como função de profundidade foi derivada empiricamente até uma profundidade de 140 m. RESUMO. Parâmetros elásticos para sedimentos marinhos rasos foram obtidos de literatura (HamiltonAnálises de coeficientes de transmissão e reflexão para conversão de modo em ondas compressionais e cisalhantes usando equações de Zoeppritz foram realizadas para o fundo do mar e um topo de reservatório de idade Terciária típico. Conclui-se que a maior parte das ondas-S refletidas e registradas no fundo do mar por cabos de fundo oceânico está relacionadaà energia ascendente convertida em uma interface profunda e não de uma onda-S descendente convertida no fundo do mar.Foi concluído também que, usando premissas elásticas, a conversão de modo (tanto P-para S-quanto S-para P-) da energia ascendenteé negligenciável nos sedimentos rasos (acima de 160 m).Palavras-chave: V S em sedimentos marinhos, conversões de modo.Petrobras / UN-Rio / Atp-Ro / Res,

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“…A seismic cone-penetration test (CPT) technique· has been successfully used by Robertson et al (1986) in a range of weak, fine-grained materials. A similar CPT probe was constructed for use on the Rangitaiki Plains where flexible alluvial material overlying rigid wave-compacted marine sands was expected (pullar 1985).…”

Section: Techniquesmentioning

confidence: 99%