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http://dx.doi.org/10.7843/kgs.2011.27.12.027

Behavior of Buried Geo-structures due to Increase of Excess Pore Water Pressure Ratio During Earthquakes  

Kang, Gi-Chun (Dept. of Civil, Architectural, and Environmental Engrg., Missouri Univ. of Science and Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.12, 2011 , pp. 27-37 More about this Journal
Abstract
Uplift phenomenon occurs when the apparent unit weight of buried geo-structures becomes smaller than that of the liquefied backfill due to the increase of an excess pore water pressure during strong earthquakes. In order to explain the relationship between the uplift displacement of the buried geo-structures and the increase of the excess pore water pressure ratio in backfill, dynamic centrifuge model tests are conducted. In the present study, primary and secondary factors against uplift behavior of the buried geo-structures are considered in the dynamic centrifuge model tests. Among these factors, the most important factors affecting the increase in the excess pore water pressure ratio were the ground water depth, the relative density of backfill, and the amplitude of the input acceleration, which were also largely affect the uplift amount of the buried geo-structures.
Keywords
Buried geo-structure; Dynamic centrifuge model tests; Excess pore water pressure ratio; Liquefied backfill; Up1ift phenomenon;
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