Integrated geophysical surveys for the safety evaluation of a ground subsidence zone in a small city

Kim, Jung Ho; Yi, Myeong‐Jong; Hwang, Soonwook; Song, Yoonho; Cho, Seong‐Jun; Synn, Joong-Ho

doi:10.1088/1742-2132/4/3/s12

Cited by 33 publications

(13 citation statements)

References 22 publications

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“…Over the past decades, land subsidence was analyzed using borehole hydrogeological data, optical remote sensing images, leveling, and GPS data. Recently, the need of acquiring more comprehensive information on the structure and geological properties of the subsurface to understand the mechanisms driving uneven land subsidence became evident (Kim et al, 2007; Smith & Knight, 2019; Teatini et al, 2011). Although borehole information can precisely reveal the formation structure and lithology at specific locations, these data are expensive and insufficient to comprehensively reveal geological structure of underground space, especially in faulted basins.…”

Section: Introductionmentioning

confidence: 99%

Understanding Uneven Land Subsidence in Beijing, China, Using a Novel Combination of Geophysical Prospecting and InSAR

Lin

Gong

et al. 2020

Geophysical Research Letters

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A novel approach was developed to quantitatively examine land subsidence. It combines a new geophysical (NG) prospecting and the interferometric synthetic aperture radar (InSAR) technology to explore uneven development of land subsidence in Beijing, China. We derived land subsidence spatial information over 4 years (from November 2014 to July 2018) based on Sentinel‐1 satellite imagery and the small‐baseline InSAR (SBAS‐InSAR) method. Also, profile data were acquired using seismic frequency resonance (SFR) approach in a few settlement areas. We developed a geological model based on boreholes and SFR data. Thus, we can quantitively study the driving forces of a typical uneven land subsidence. We found that faults are controlling spatial developments of land subsidence in Beijing. The subsidence rates have different values along the same fault. Also, we revealed the contributions of compressible layers to the formation of uneven land subsidence.

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Section: Introductionmentioning

confidence: 99%

Understanding Uneven Land Subsidence in Beijing, China, Using a Novel Combination of Geophysical Prospecting and InSAR

Lin

Gong

et al. 2020

Geophysical Research Letters

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“…Two main approaches were developed to improve the quality of underground cave locating. The first one consists of the ERT application in combination with other geophysical methods, i.e., with ground penetrating radar (LEUCCI and DE GIORGI 2005;EL KHAMMARI et al 2007;KIM et al 2007), with magnetic (KIM et al 2007GUERIN et al 2009), with self-potential tomography (WILKINSON et al 2005) and seismic (GUERIN et al 2009;CARDARELLI et al 2009) or even several geophysical methods (KIM et al 2007;GUERIN et al 2009). However, the application of several geophysical methods being used for an engineering aim is highly time-consuming and expensive.…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Resistivity Anomalies Caused by Underground Caves

Frid

Averbach

Frid

et al. 2015

Pure Appl. Geophys.

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Geophysical prospecting of underground caves being performed on a construction site is often still a challenging procedure. Estimation of a likelihood level of an anomaly found is frequently a mandatory requirement of a project principal due to necessity of risk/safety assessment. However, the methodology of such estimation is not hitherto developed. Aiming to put forward such a methodology the present study (being performed as a part of an underground caves mapping prior to the land development on the site area) consisted of application of electrical resistivity tomography (ERT) together with statistical analysis utilized for the likelihood assessment of underground anomalies located. The methodology was first verified via a synthetic modeling technique and applied to the in situ collected ERT data and then crossed referenced with intrusive investigations (excavation and drilling) for the data verification. The drilling/excavation results showed that the proper discovering of underground caves can be done if anomaly probability level is not lower than 90 %. Such a probability value was shown to be consistent with the modeling results. More than 30 underground cavities were discovered on the site utilizing the methodology.

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“…Geophysical methods such as seismic, microgravity, self-potential, electrical resistivity, electromagnetic, and ground-penetrating radar are more advantageous for geohazard investigations because of their nonintrusive nature and cost effectiveness [ 4 , 8 , 9 ]. This is particularly the case in urbanised areas, in which the use of direct methods is virtually impossible [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…In such areas, geophysical methods can provide a cost-effective solution for investigating the subsurface and for detecting cavity formation and voids [ 4 , 11 , 12 ]. In this context, the principal task of geophysical surveys is to identify precisely the presence of cavities [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Geophysical Techniques for 3D Geohazard Mapping to Delineate Cavities and Potential Sinkholes in the Northern Part of Kuala Lumpur, Malaysia

Bakhshipour

Huat

Ibrahim

et al. 2013

The Scientific World Journal

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This work describes the application of the electrical resistivity (ER) method to delineating subsurface structures and cavities in Kuala Lumpur Limestone within the Batu Cave area of Selangor Darul Ehsan, Malaysia. In all, 17 ER profiles were measured by using a Wenner electrode configuration with 2 m spacing. The field survey was accompanied by laboratory work, which involves taking resistivity measurements of rock, soil, and water samples taken from the field to obtain the formation factor. The relationship between resistivity and the formation factor and porosity for all the samples was established. The porosity values were plotted and contoured. A 2-dimensional and 3-dimensional representation of the subsurface topography of the area was prepared through use of commercial computer software. The results show the presence of cavities and sinkholes in some parts of the study area. This work could help engineers and environmental managers by providing the information necessary to produce a sustainable management plan in order to prevent catastrophic collapses of structures and other related geohazard problems.

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Integrated geophysical surveys for the safety evaluation of a ground subsidence zone in a small city

Cited by 33 publications

References 22 publications

Understanding Uneven Land Subsidence in Beijing, China, Using a Novel Combination of Geophysical Prospecting and InSAR

Understanding Uneven Land Subsidence in Beijing, China, Using a Novel Combination of Geophysical Prospecting and InSAR

Statistical Analysis of Resistivity Anomalies Caused by Underground Caves

Application of Geophysical Techniques for 3D Geohazard Mapping to Delineate Cavities and Potential Sinkholes in the Northern Part of Kuala Lumpur, Malaysia

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