Direct determination of resonant properties of near-surface sediments using microtremor

Kolesnikov, Yu. I.; Fedin, Konstantin; Ngomayezwe, L.

doi:10.1016/j.soildyn.2019.105739

Cited by 14 publications

(4 citation statements)

References 20 publications

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“…The microtremor measurement method has been found to be useful in investigating the near-surface geology. This near-surface investigation is mainly concerned with seismic hazard assessment (see [14] , [15] , [16] , [17] , [18] , [19] ).…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Sub-surface shear wave velocity models developed based on a combined in-situ measurement of quasi-static cone penetration test (q-CPT) and microtremor datasets

Setiawan,

Juellyan,

Al-huda

et al. 2024

Data in Brief

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Sub-surface shear wave velocity models developed based on a combined in-situ measurement of quasi-static cone penetration test (q-CPT) and microtremor datasets

Setiawan,

Juellyan,

Al-huda

et al. 2024

Data in Brief

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“…Under such conditions, only very weak standing waves can be formed, which would require very long noise recordings to extract these waves from microtremor. For example, even when determining the resonant properties of a layer of near‐surface sediments lying on hard bedrocks with the method under consideration, it was necessary to record microtremor for 10–14 days to extract reliably standing waves (Kolesnikov et al ., 2019).…”

Section: Justification Of the Cave Mapping Methodsmentioning

confidence: 99%

Mapping of underground cavities by the passive seismic standing waves method: the case study of Barsukovskaya cave (Novosibirsk region, Russia)

Fedin

Kolesnikov

Ngomayezwe

2020

Geophysical Prospecting

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This article presents the results of mapping a karst cave by the passive seismic standing waves method. Barsukovskaya cave is located about 100 km southeast of the city of Novosibirsk (Russia). The total length of the cave's passages and grottoes is estimated at about 200 m, the maximum depth from the earth's surface is about 19 m. The method for studying underground cavities used is based on the effect of the generation of standing waves by microtremor in the space between the earth's surface and the cave roof. The accumulation of amplitude spectra of a large number of microtremor records makes it possible to determine the frequencies of the first few modes of these waves. Areal passive seismic survey on the earth's surface above the cave made it possible to construct a map of the lowest mode frequency distribution over the cave roof. Since no standing waves were observed at other points, this map reflects the cave structure in plan, which confirms the comparison with the cave diagram drawn up earlier by one of the speleologists. A schematic map of the depth of the cave roof was constructed using the longitudinal wave velocity V p = 3120 m/s determined by the rock samples selected near the entrance to the cave. This map at a qualitative level also agrees with the data of speleologists, which indicate that the cave, on average, gradually becomes deeper from the entrance to its dead-end branches. The shallower depths in comparison with the data of speleologists are apparently explained by a very low estimate of the velocity determined from a rock sample taken near the entrance to the cave. The reliability of the obtained cave mapping results is confirmed by the numerical simulation results using the finite-element method.

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“…The energy generated by noise sources of standing waves can only represent a relatively small fraction of the total energy of the wave field. However, as shown by physical modelling and field experiments (Kolesnikov and Fedin, 2018; Kolesnikov et al ., 2019; Fedin et al ., 2021), the accumulation of amplitude spectra of a large number of noise records allows one to confidently determine the frequencies of standing waves generated in the object under study. These frequencies can be used to assess the properties and state of an object.…”

Section: Justification Of Using Elastic Standing Waves For the Diagnosis Of Asphalt Pavementsmentioning

confidence: 99%

Diagnostics of asphalt pavement using elastic standing waves

Ngomayezwe

Kolesnikov

Fedin

2021

Near Surface Geophysics

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To ensure the safe operation of roads, it is necessary to periodically monitor the condition of road surfaces. Lately, near-surface geophysics methods have been actively used to solve such problems. The seismoacoustic methods that are used to diagnose road surfaces are typically dynamic methods based on the excitation of body or surface elastic waves in the road surfaces. The purpose of this work is to assess the possibilities of using elastic standing waves for diagnosing a hard road surface. This article presents the results of field experiments that demonstrate the possibility of detecting cavities under an asphalt pavement using flexural standing waves. Such waves, like vibrations of a membrane fixed or partially fixed at its edges, can be formed on the hard surface cover above the cavity as a result of exposure to acoustic noise. In this article, the accumulation of amplitude spectra of a large number of noise records was used to extract standing waves from the acoustic noise recorded on the surface of the pavement. It is shown that the joint visualization of the averaged spectra obtained by profile observations over the cavity makes it possible to confidently identify several modes of flexural standing waves. Based on the areal measurements, a map of the distribution of the amplitudes of one of the modes of flexural standing waves in the asphalt pavement over the cavity was constructed. At a qualitative level, this distribution is consistent with the results of computer simulations using the finite element method. The fact that, under the influence of acoustic noise in the pavement, the flexural standing waves are formed which are absent at other places indicates the absence of rigid contact at its lower boundary. Thus, the horizontal dimensions of the cavity can be estimated from the size of the area on which flexural standing waves are formed. In addition, the article shows that the analysis of vertical compressional (but not flexural) standing waves arising in the pavement under the influence of noise allows us to investigate the thickness of the pavement and to qualitatively assess the ratio of acoustic stiffness of the pavement and the underlying layer.

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Direct determination of resonant properties of near-surface sediments using microtremor

Cited by 14 publications

References 20 publications

Sub-surface shear wave velocity models developed based on a combined in-situ measurement of quasi-static cone penetration test (q-CPT) and microtremor datasets

Sub-surface shear wave velocity models developed based on a combined in-situ measurement of quasi-static cone penetration test (q-CPT) and microtremor datasets

Mapping of underground cavities by the passive seismic standing waves method: the case study of Barsukovskaya cave (Novosibirsk region, Russia)

Diagnostics of asphalt pavement using elastic standing waves

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