Study on the reasonable liquefaction prediction of Urayasu in case of the Great East Japan Earthquake based on Representative Soil Profile Models

Ishikawa, Keisuke; Yasuda, Susumu; Ikarashi, Shota

doi:10.5610/jaee.16.1_70

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…in the same area was used. For Nakamachi and Shinmachi areas, 200 gal was adopted as the peak ground acceleration, which was based on the one-dimensional seismic response analysis reported by Ishikawa et al (2014). …”

Section: Soil Parameter Estimationmentioning

confidence: 99%

Liquefaction-induced ground subsidence extracted from Digital Surface Models and its application to hazard map of Urayasu city, Japan

Kajihara

Mohan

Kamiya

et al. 2016

JGS Special Publication

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The major problems associated with liquefaction-induced ground subsidence are tilting of houses, buckling of roads, lifelines cut off, etc. For the mitigation and preparedness over the liquefaction-induced damage, a detailed study on prediction of ground subsidence for future earthquake is important. On the 11 th of March 2011, the Off the Pacific Coast of Tohoku Earthquake (MW=9) hit Japan and caused severe liquefaction in Urayasu City, Chiba Prefecture. In this study, in order to investigate the relationship between liquefaction potential, PL, and liquefaction-induced subsidence which occurred in the 2011 earthquake, liquefaction assessment is first carried out by using a number of boreholes and relevant soil test data from Urayasu city. Then, the liquefaction-induced road subsidence is extracted from a set of the Digital Surface Models (DSMs) from airborne LiDAR (Light Detection And Ranging) surveys before (2006) and after (2011) the earthquake. The extracted subsidence from the DSMs indicates that the liquefaction-induced road subsidence is larger for the residential roads than that of the main roads, thus the relationship between PL and road subsidence is different for each type of road. Finally, an attempt is made to apply the obtained PL and road subsidence relations to attain a unique hazard map for Urayasu city.

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Section: Soil Parameter Estimationmentioning

confidence: 99%

Liquefaction-induced ground subsidence extracted from Digital Surface Models and its application to hazard map of Urayasu city, Japan

Kajihara

Mohan

Kamiya

et al. 2016

JGS Special Publication

View full text Add to dashboard Cite

show abstract

Scp工法の改良効果のエネルギー的な視点からの考察

TSUBOI,

ISHIKAWA,

YASUDA

et al. 2024

J. Soc. Mat. Sci., Japan

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In the Great East Japan Earthquake of March 11, 2011, liquefaction was not observed in areas where sand compaction piles (SCP) had been used for soil improvement, confirming the effectiveness of the compaction method. Recently, energy-based liquefaction determination methods have been developed for liquefaction determination in the design of SCP methods. In this study, hollow torsional shear tests were conducted under isotropic and anisotropic stress conditions with different fine-grain content and density. Then, liquefaction determination was conducted using both the FL and energy methods, and the validity of the obtained experimental results and the improvement effects were discussed from an energetic viewpoint. The results showed that the liquefaction strength ratio and the normalized cumulative loss energy increased with an increase in coefficient of earth pressure at rest. The liquefaction determination results suggest that the energy method may be more sensitive than the FL method in considering the improvement effect.

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Study on the reasonable liquefaction prediction of Urayasu in case of the Great East Japan Earthquake based on Representative Soil Profile Models

Cited by 2 publications

References 2 publications

Liquefaction-induced ground subsidence extracted from Digital Surface Models and its application to hazard map of Urayasu city, Japan

Liquefaction-induced ground subsidence extracted from Digital Surface Models and its application to hazard map of Urayasu city, Japan

Scp工法の改良効果のエネルギー的な視点からの考察

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