Liquefaction of soil in the Tokyo Bay area from the 2011 Tohoku (Japan) earthquake

Bhattacharya, Subhamoy; Hyodo, Masayuki; Goda, Katsuichiro; Tazoh, Takashi; Taylor, Colin Anthony

doi:10.1016/j.soildyn.2011.06.006

Cited by 174 publications

(65 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A dramatic change of the public risk perception towards nuclear energy has happened in the aftermath of the 2011 Tohoku earthquake due to the Fukushima Nuclear Power Plant (NPP) disaster. Further details of the 2011 Tohoku earthquake can be found in Bhattacharya et al (2011) and Goda et al (2013). In this context, it is noteworthy that India and China, which are situated in seismically active regions, are constructing Nuclear Power Plants to meet the increasing high energy demand.…”

Section: Introductionmentioning

confidence: 99%

Use of offshore wind farms to increase seismic resilience of Nuclear Power Plants

Bhattacharya

Goda

2016

Soil Dynamics and Earthquake Engineering

Self Cite

View full text Add to dashboard Cite

One of the challenges faced by the engineering profession is to meet the energy requirement of an increasingly prosperous world. Nuclear power was considered as a reliable option until the Fukushima Daiichi Nuclear Power Plant (NPP) disaster which eroded the public confidence. This short paper shows that offshore wind turbines (due to its shape and form, i.e. heavy rotating mass resting at the top of a tall tower) have long natural vibration periods (>3.0 s) and are less susceptible to earthquake dynamics. The performance of near-shore wind turbines structures during the 2011 Tohoku earthquake is reviewed. It has been observed that they performed well. As NPPs are often sited close to the sea, it is proposed that a small wind farm capable of supplying emergency backup power along with a NPP can be a better safety system (robust and resilient system) in avoiding cascading failures and catastrophic consequences

show abstract

Section: Introductionmentioning

confidence: 99%

Use of offshore wind farms to increase seismic resilience of Nuclear Power Plants

Bhattacharya

Goda

2016

Soil Dynamics and Earthquake Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…1(a)) (Hoshiba et al, 2011). There were large areas of soil liquefaction, especially along Tokyo Bay and the Tone River, causing extensive damage to residential buildings and infrastructure (Bhattacharya et al, 2011;Yasuda and Harada, 2011;Senna et al, 2012). According to the geomorphologic classification of the Kanto region (Wakamatsu et al, 2005), areas around Tokyo Bay are mainly covered by filled land.…”

Section: Introductionmentioning

confidence: 99%

Detection and mapping of soil liquefaction in the 2011 Tohoku earthquake using SAR interferometry

2012

View full text Add to dashboard Cite

We have identified areas of soil liquefaction by the analysis of surface changes caused by the 2011 Tohoku earthquake, using synthetic aperture radar (SAR) interferometry in the Kanto region of Japan. Changes in surface scattering properties were evaluated using phase-corrected coherence, computed from the reflective intensity (amplitude) of SAR data. Often, the loss of coherence (decorrelation) is simply considered to represent areas damaged from the disaster. However, temporal decorrelation could also be induced by ordinal surface cover change in addition to disaster damage. Therefore, we use a coherence change threshold to discriminate significant decorrelation caused by soil liquefaction from that produced by ordinal surface cover changes. Moreover, local surface displacements are estimated using phase information from the SAR data. Our results compare favorably with those from surveys of sand boils and aerial photography, showing that surface changes derived from SAR data are associated with soil liquefaction. Our results demonstrate that soil liquefaction occurred mainly near the waterfront along Tokyo Bay and the Tone River, and ground subsidence was widely distributed.

show abstract

“…Reclaimed platforms can, however, be seriously affected by settlements, which may cause severe damage to buildings, highways, Over the past few years, the coastal area of Lingang New City, which extends for about 300 km 2 (45% of which was reclaimed from intertidal wetlands), has been subjected to broad modifications in its geomorphology and urban environment. Due to land reclamation, two main inherent problems have arisen: (i) liquefaction; and (ii) ground settlements, both of which are responsible for serious failures and damage to infrastructures of reclaimed foundations [12][13][14]. Results of geotechnical analyses have revealed that such a settlement usually continues over the entire reclamation facility lifetime.…”

Section: Introductionmentioning

confidence: 99%

“…Due to land reclamation, two main inherent problems have arisen: (i) liquefaction; and (ii) ground settlements, both of which are responsible for serious failures and damage to infrastructures of reclaimed foundations [12][13][14]. Results of geotechnical analyses have revealed that such a settlement usually continues over the entire reclamation facility lifetime.…”

Section: Introductionmentioning

confidence: 99%

The Use of C-/X-Band Time-Gapped SAR Data and Geotechnical Models for the Study of Shanghai’s Ocean-Reclaimed Lands through the SBAS-DInSAR Technique

et al. 2016

View full text Add to dashboard Cite

Abstract:In this work, we investigate the temporal evolution of ground deformation affecting the ocean-reclaimed lands of the Shanghai (China) megacity, from 2007 to 2016, by applying the Differential Synthetic Aperture Radar Interferometry (DInSAR) technique known as the Small BAseline Subset (SBAS) algorithm. For the analysis, we exploited two sets of non-time-overlapped synthetic aperture radar (SAR) data, acquired from 2007 to 2010, by the ASAR/ENVISAT (C-band) instrument, and from 2014 to 2016 by the X-band COSMO-SkyMed (CSK) sensors. The long time gap (of about three years) existing between the available C-and X-band datasets made the generation of unique displacement time-series more difficult. Nonetheless, this problem was successfully solved by benefiting from knowledge of time-dependent geotechnical models, which describe the temporal evolution of the expected deformation affecting Shanghai's ocean-reclaimed platforms. The combined ENVISAT/CSK (vertical) deformation time-series were analyzed to gain insight into the future evolution of displacement signals within the investigated area. As an outcome, we find that ocean-reclaimed lands in Shanghai experienced, between 2007 and 2016, average cumulative (vertical) displacements extending down to 25 centimeters.

show abstract

Liquefaction of soil in the Tokyo Bay area from the 2011 Tohoku (Japan) earthquake

Cited by 174 publications

References 15 publications

Use of offshore wind farms to increase seismic resilience of Nuclear Power Plants

Use of offshore wind farms to increase seismic resilience of Nuclear Power Plants

Detection and mapping of soil liquefaction in the 2011 Tohoku earthquake using SAR interferometry

The Use of C-/X-Band Time-Gapped SAR Data and Geotechnical Models for the Study of Shanghai’s Ocean-Reclaimed Lands through the SBAS-DInSAR Technique

Contact Info

Product

Resources

About