[1]Masaki KITAZUME.Applications of Deep Mixing to Earthquake Disaster Mitigation[J].Journal of Seismological Research,2017,40(01):29-34.
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Applications of Deep Mixing to Earthquake Disaster Mitigation
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
40
Number of periods:
2017 01
Page number:
29-34
Column:
Public date:
2017-03-20
- Title:
- Applications of Deep Mixing to Earthquake Disaster Mitigation
- Keywords:
- deep mixing method; earthquake; liquefaction; disaster mitigation
- CLC:
- TU473
- DOI:
- -
- Abstract:
- :In Japan,soft alluvial clay ground has frequently encountered in on land and marine constructions.The ground is so soft and compressible large settlement and failure can occur.Sandy soil has relatively better properties for compressibility,but liquefaction might happen during earthquakes in the case of loose and saturated condition.Many earthquakes occur each year in Japan,in which the 1995 Hyogoken-Nambu earthquake and the 2011 Tōhoku earthquake induced both a humanitarian crisis and massive economic impacts.As liquefaction which occurs in a loose and saturated sand layer,inducing quite large damages of infrastructures,the importance of liquefaction mitigation has been emphasized to minimize earthquake disasters for many years.Many kinds of ground improvement techniques based on various principles have been developed for earthquake disaster mitigation.Among them,the deep mixing method(DMM),one of the in-situ cement stabilization techniques,was developed in 1970s in Japan and has been often applied to improvement of clayey and sandy soils.Recently,the grid type of DMM has also been applied to prevent liquefaction,where the grid of stabilized column walls function to restrict generation of excessive pore pressure by confining the soil particle movement during earthquakes.The improvement effect of the method was first evaluated in the 1995 Hyogoken-Nambu earthquake.In this paper,some applications of deep mixing method to earthquake disaster mitigation are briefly introduced.
- References:
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Last Update:
2017-03-20