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Showing 1 to 20 of 22 for “"MASW"”.
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Characterization of soft soil using multi-channel analysis of surface waves (MASW) and electrical resistivity method (ERM)
… the multi-channel analysis of surface waves (MASW) and the soil stratigraphy using Electrical Resistivity Method (ERM). The soft soil Vs and stratigraphy were determined and correlated with the peat sampler and borehole data to obtain more accurate data. The research was conducted at Parit …
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Delineation of a coal combustion residue landfill and underlying karst subsurface in Southwest Missouri using ERT and MASW surveys
… and multichannel analysis of surface waves (MASW) data were acquired across and in proximity to a CCR landfill in southwest Missouri, USA, with the intent to identify potential karst features and seepage pathways.</p> <p>Electrical resistivity tomography data were acquired using an automated …
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Imaging in karst terrain using the Electrical Resistivity Tomography (ERT) and Multi-Channel Analysis of Surface Waves (MASW) methods
… and Multi-channel Analysis of Surface Waves (MASW) methods were used to image the subsurface in karst terrain in the southeast of Missouri. A SuperSting R8 system was used to acquire the ERT profiles; a multi-channel engineering seismograph was used to acquire the MASW data. The latter data …
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Near-surface void characterization and sensitivity analysis using enhanced processing procedures on passive Multi-Channel Analysis of Surface Waves (MASW) data
… passive multichannel analysis of surface-waves (MASW) data were utilized to identify velocity anomalies above known salt solution voids in Hutchinson, Kansas, likely caused by the changing stress field due to the migration and/or expansion of the void. Previous geophysical studies within the …
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Geophysical assessment of soil and rock in the New Madrid seismic zone
… and multichannel analysis of surface waves (MASW) data were acquired for the purpose of seismic site characterization. Shear wave and compressional wave velocities were used to estimate depth to bedrock and to generate 1-D plots depicting variations in Poisson's Ratio, elastic moduli and …
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Efficient Algorithms for Data Analytics in Geophysical Imaging
… and multichannel analysis of surface waves (MASW). Our cross-correlation algorithms operate directly in the wavelet domain on compressed data without requiring a reconstruction of the original signal, reducing memory costs and improving scalabiliy. Meanwhile, our MASW implementations make use …
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Imaging and mitigating karst features
… and multichannel analysis of surface waves (MASW) were employed for the acquisition of subsurface geophysical data. Borehole controls were used to verify and constrain the geophysical interpretation.</p><p>In some instances, the ERT and MASW techniques produced complementary, high quality, …
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RESISTIVITY IMAGING OF PROMINENT SEEPAGE PATHWAYS IN KARST TERRAIN
… (VI), multichannel analysis of surface waves (MASW), borehole control (BC), and aerial imagery (AI) were supplementally used to constrain the ERT data interpretations.</p> <p>This research addressed six objectives. First, the ERT data interpretations were verified in terms of depth to the top …
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Análisis dimensional de la relación entre el ensayo de penetración estándar (SPT) y las velocidades de propagación sísmica primaria y secundaria
… y análisis multicanal de ondas superficiales (MASW), respectivamente. Esto permitirá en aquellas campañas en la que solo se encuentre disponible un registro de resultados SPT poder obtener los órdenes de magnitud esperables de vp y vs y, así, poder determinar los parámetros de respuesta …
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Microzonazione sismica di livello III in contesti archeologici: metodologie integrate per la protezione del patrimonio di Pompei
… di indagini specifiche comprendente misure MASW, HVSR, rilievi GNSS e video-ispezioni di pozzi antichi. Sulla base del modello geologico e geotecnico ricostruito, sono state eseguite analisi bidimensionali di risposta sismica locale tramite accelerogrammi selezionati per diversi periodi di …
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Seismic Tomography for the Integrity Assessment of Earthen Dams and Levees.
… Multichannel Analysis of Surface Waves (MASW) and shear wave surveys were jointly considered for the purpose of dam integrity assessment. Multiple techniques were applied to an earthen embankment dam with no known defects near Oxford, Mississippi, and seismic refraction surveys were …
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Approaches to earthquake scenarios validation using seismic site response
… using the vertical component of surface waves (MASW and ReMi) were adopted, as well as ambient noise measurements, processed through the Nakamura technique. Moreover, a cluster analysis was performed to subdivide into homogeneous groups the experimentally obtained noise spectral ratios. Results …
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GIS-based spatial analysis coupled with geophysical imaging to identify and evaluate factors that control the formation of karst sinkholes in southwestern Missouri
… (2D) and pseudo three dimensional (3D) - ERT, MASW, and borehole data were used to characterize the subsurface morphology of the karstified soil-bedrock interface in five selected sinkholes. From the interpretation of the 2D and pseudo 3D-ERT profiles, it was determined that four of the five …
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Dissolution-enlarged fractures imaging using electrical resistivity tomography (ERT)
… The Multi-channel Analysis of Surface Wave (MASW) method and coring were employed to validate the interpretation results.</p><p>Two sets of orthogonal visually prominent joints have been identified in the investigation site: north-south trending joint sets and west-east trending joint sets. …
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Geophysical Imaging of Karst Features in Missouri
… with multichannel analysis of surface waves (MASW) and boring data were used to map karst related features in Missouri in order to understand karst processes better in Missouri. Previous works on karst in Missouri were mostly surficial mapping of bedrock outcrops and joints, which are not …
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Development of the Spectral-Analysis-of-Body-Waves (SABW) method for downhole seismic testing with boreholes or penetrometers
… and Multi-Channel-Analysis-of-Surface-Waves (MASW) methods. In this research, an automated procedure for calculating body wave velocities that is based on frequency-domain analysis is presented. The basis for and an automated procedure to calculated body wave dispersion is also presented. …
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Microzonage sismique de la ville des cayes (haïti)
… SPT, de pénétromètre dynamique (PD) et de MASW ont été compilées pour la caractérisation des sols de la ville des Cayes. Ces mesures ont été exécutées dans la région plaine à des profondeurs d’investigation atteignant 10 à 30 m. Des corrélations de la littérature, entre SPT et PD et entre …
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Damage assessment in reinforced concrete using contactless ultrasound
… deploys multichannel analysis of surface waves (MASW) measurements interpreted through Lamb wave mode analysis; 3-D images are generated that make use of the Lamb wave mode jump condition in order to identify the presence of underlying delamination defects. The next application incorporates …
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Αστικό δίκτυο επιταχυνσιογράφων της Πάτρας (UPAN) : εγκατάσταση, ανάπτυξη βάσης δεδομένων και επεξεργασία καταγραφών
… προσδιορίστηκε από επί-τόπου μετρήσεις Vs (SASW, MASW, Remi). Με χωρική παρεμβολή αναπτύχθηκε 3-D μοντέλο Vs, το οποίο επέτρεψε την εκτίμηση της τιμής Vs30 και την κατηγοριοποίηση του εδάφους σε οποιαδήποτε θέση του αστικού χώρου. Πραγματοποιήθηκαν επίσης εργαστηριακές δοκιμές συντονισμού με σκοπό …
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