Geophysics in Near-Surface Investigations

Jadwiga, A.; Dec, Jerzy; Karczewski, Jerzy; Porzucek, Sławomir; Tomecka-Sucho, Sylwia; Wojas, Anna; Zitek, Jerzy

doi:10.5772/37067

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Seismic refraction maps the contrasts of seismic velocitiesthe velocities of seismic wave propagation through soil, deeper layers and bedrock. Velocity usually well correlates with rock hardness and density, which in turn tends to correlate with changes in lithology, degree of fracturing, water content and weathering (Dec 2004;Jarzyna et al 2012;Harba and Pilecki 2017;Pilecki et al 2017). That is why very often in seismic investigations of bedrock quality, this morphology and quaternary cover thickness, the seismic refraction surveys are applied.…”

Section: Theoretical Background Of Seismic Methodsmentioning

confidence: 99%

Application of GPR and seismic methods for noninvasive examination of glacial and postglacial sediments in the Psia Trawka glade: the Tatra Mts., Poland

et al. 2019

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Presented study gives an insight into general proportions of the actual geomorphology, subglacial morphology and thickness of the drift (quaternary sediments) particularly well-pronounced glacial morphology in the Tatras and, on the other hand, the general scarcity of the data in this field. Objectives of the geophysical survey in this study were imaging of the morphology of bedrock surface under the drift (glacial and postglacial) sediments and determination of thickness of the drift and its composition. Two methods were applied: Ground Penetrating Radar (GPR) and seismic refraction profiling. GPR was used to examine drift sediments due to its high resolution and low depth of penetration. Seismic method with lower resolution but higher penetration depth gave an image of boundary between bedrock and drift. In addition, the results of seismic tomography allowed the velocity field imaging which shows changes inside the postglacial deposits. The results of the two methods used in this research suggest that points of depression exist in the subglacial morphology with a depth of about c.a. 40 below the present-day terrain surface and c.a. 25 m below surrounding subglacial surface. This trough has also been estimated to be about 150 m wide. Its considerable depth and steep slopes show that its origin can be related to erosion of subglacial water during the decay of the last (Würm) glaciation of the Sucha Woda and Panszczyca valleys.

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Section: Theoretical Background Of Seismic Methodsmentioning

confidence: 99%

Application of GPR and seismic methods for noninvasive examination of glacial and postglacial sediments in the Psia Trawka glade: the Tatra Mts., Poland

et al. 2019

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“…Considering the possibilities of the method for detecting embankment structure (transition of layers, bottom of levee), localisation of disturbances (zones with loose material), identification of anomalies and non-homogeneities such as cavities and discontinuities, and for evaluation of integrity of the contact between soil and concrete galleries of retention dams, the GPR system was selected as an optimum first-pass method [62], which serves for preliminary estimation of damage. However, it is also necessary to highlight the limitations of the method in which highly saturated materials cause greater damping of electromagnetic signals.…”

Section: Embankment Structuresmentioning

confidence: 99%

Geotechnics as an unavoidable segment of earthquake engineering

2020

JCE

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A broader overview of the role of geotechnics in earthquake engineering is given, and a set of practical examples of the quantification of geotechnical seismic indicators for construction of individual buildings is provided. An overview of oncoming changes to the current design standards for evaluating the effect the soil has on buildings in earthquake conditions is also given. Considering the level of seismic activity in Croatia, the need for adopting a comprehensive approach to seismic microzoning is emphasized, which involves a whole array of indicators, from lithological, engineering geological, and hydrogeological properties, and position of active faults, to identification of unstable slopes and zones of pronounced liquefaction potential, for which extensive geophysical and geotechnical investigations are required.

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The magnetic susceptibility of soils in Krakow, southern Poland

Wojas

2017

Acta Geophys.

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Geophysics in Near-Surface Investigations

Cited by 3 publications

References 4 publications

Application of GPR and seismic methods for noninvasive examination of glacial and postglacial sediments in the Psia Trawka glade: the Tatra Mts., Poland

Application of GPR and seismic methods for noninvasive examination of glacial and postglacial sediments in the Psia Trawka glade: the Tatra Mts., Poland

Geotechnics as an unavoidable segment of earthquake engineering

The magnetic susceptibility of soils in Krakow, southern Poland

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