Plus/Minus refraction method applied to a 3D block

Bridle, Ralph

doi:10.1190/1.2369786

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…When the obtained values are evaluated according to Bowles (1996), the geological units can be defined in three groups as: (1) loose (μ ≤ 600 kg/cm 2 , E ≤ 2000 kg/cm 2 ), (2) moderately stiff and medium solid (600 < μ ≤ 3000 kg/cm 2 , 2000 < E ≤ 10,000 kg/ cm 2 ) and (3) strong to stronger (μ > 3000 kg/cm 2 , E > 10,000 kg/cm 2 ). However, according to ASTM (1978), the incompressibility levels of these units are can be defined as low (400 < K ≤ 10,000 kg/cm 2 ), medium (10,000 < K ≤ 40,000 kg/cm 2 ) and high (40,000 < K ≤ 100,000 kg/cm 2 ).…”

Section: Evaluation and Interpretation Of Profilesmentioning

confidence: 99%

Subsurface characterization by active and passive source geophysical methods after the 06 February 2023 earthquakes in Turkey

Karslı,

Babacan,

Akın

2024

Nat Hazards

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Two large earthquakes (Mw = 7.7 and Mw = 7.6) that occurred in Turkey on February 6, 2023, affected a very extent region and caused a lot of loss of life and property. This paper presents preliminary results from geophysical measurements (Seismic Refraction Tomography-SRT, Multi-Channel Surface Wave Analysis-MASW and Microtremor-MT) on eight profiles in four provinces (Kahramanmaraş, Hatay, Malatya, Gaziantep) to understand the relationship between subsurface properties and the destruction that occurs immediately after earthquakes. By analyzing the geophysical data, the dynamic-elastic properties of ground and the soil classification according to Vs30 were determined. It is generally understood that the near-surface (< ~ 10–15 m) units in the measurement areas are very loose, and the deeper ones (≥ ~ 15–20 m) have a very porous/fractured structure. Soil classes were defined as ZD (Malatya-1, Hatay-1 and Kahramanmaraş-1) and ZC (Malatya-2, Hatay-2, Gaziantep-1,2 and Kahramanmaraş-2). In addition, by evaluating the information of strong ground motion station closest to the measurement profiles, it is observed that the PGA values versus epicenter distances are higher at stations in the zone parallel to the direction of both faults than those in the perpendicular zones. This leads directivity effect in the propagation of earthquake waves. The results indicate that one of the basic reasons for the damages is that the earthquake-ground-structure relationship has not been fully and accurately reflected in building designs. Therefore, future researches involving more geophysical data and PGA values will provide more information about the structural, physical and geotechnical properties of subsurface and definitive results.

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Section: Evaluation and Interpretation Of Profilesmentioning

confidence: 99%

Subsurface characterization by active and passive source geophysical methods after the 06 February 2023 earthquakes in Turkey

Karslı,

Babacan,

Akın

2024

Nat Hazards

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“…This technique is routinely used in many applications such as engineering, environmental, groundwater, hydrocarbon, and industrial-mineral exploration (Lankston, 1989;Hodgkinson and Brown, 2005;Bridle, 2006;Yilmaz et al, 2006). Some of the traditional interpretation methods of seismic refraction data have used a concept of layered horizons or zones where each horizon has a discrete seismic velocity (Nettleton, 1940;Hales, 1958;Hagedoorn, 1959;Hawkins, 1961;Dobrin, 1976), while some others present lateral velocity variations inside each horizon or velocity zone (Palmer, 1980(Palmer, , 1981.…”

Section: Introductionmentioning

confidence: 98%

Engineering applications of seismic refraction method: A field example at Wadi Wardan, Northeast Gulf of Suez, Sinai, Egypt

Khalil

Hanafy

2008

Journal of Applied Geophysics

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“…The involvement as regards numerical model is de ned by the quality and quantity of a concerned research area and the data available. In the case of seismic siteresponse analysis, 2D/3D models are an acceptable simpli cation of geological processes for areal width/depth ratio together with the existence of geometrical effects such as edge-generated surface waves (Kilty, 1986: Bridle, 2006. The paramount objectives of this current research breathe on proposing acceptable approaches to seismic measured and computed super cial elastic, bearing, and engineering attributes about the sub-surface.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Low Strain Parameters for Seismic Microzonation in Uyo, South-south, Nigeria

Aka

Dick²,

Essien³

et al. 2022

Preprint

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This study had been executed employing Seismic Refraction Tomography (SRT) and Multichannel Analysis of Surface Waves (MASW), to integrate elastic and bearing capacity with engineering criteria within delineation for seismic microzonation besides menace assessment. Forty-eight and eight SRT and MASW outline through an aggregate distance of about 484 m breathe constrained toward characterizing topsoil variables conducive to site characterization. 12 kg sledge hammers with 1.0 m diameter aluminum disc, twenty-four channels (ES 30000S) enhancement seismographs were used as seismic sources, detectors, and recorders. P and S wave’s velocities breathe attained as well as delineated employing SRT and MASW techniques via beget 2D/3D velocity-depth model. The elastic, bearing capacity and engineering parameters calculated were: elastic/ rigidity modulus, Poisson ratio, allowable capacity, compactness grade along with strain correlation to evaluate the near-surface substratum through geophysical and engineering potential. These parameters identified three microzones: Higher, midway, and bottom zones. The higher zone is delineated by frail soil quality; the midway one is delineated by light soil quality and the bottom zone is delineated by acceptable soil quality. The frail and light parameters of the higher and midway zones lead to the structural collapse experience in the region. Therefore, the bottom zone of acceptable soil and rock quality is recommended for the construction plan.

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Plus/Minus refraction method applied to a 3D block

Cited by 10 publications

References 7 publications

Subsurface characterization by active and passive source geophysical methods after the 06 February 2023 earthquakes in Turkey

Subsurface characterization by active and passive source geophysical methods after the 06 February 2023 earthquakes in Turkey

Engineering applications of seismic refraction method: A field example at Wadi Wardan, Northeast Gulf of Suez, Sinai, Egypt

Assessment of Low Strain Parameters for Seismic Microzonation in Uyo, South-south, Nigeria

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