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http://dx.doi.org/10.7843/kgs.2013.29.3.15

Settlement Characteristics of Soft Ground Applying the Suction Drain Method  

Han, Sang-Jae (Expert Group for Earth and Environment)
Yoo, Han-Kyu (Hanyang University)
Kim, Byung-Il (Research Institute, Expert Group for Earth and Environment)
Kim, Soo-Sam (Land&Housing Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.29, no.3, 2013 , pp. 15-27 More about this Journal
Abstract
A vacuum pressure method has been developed to solve many problems in the conventional surcharge method such as embankments, and its application has increased in the country. Recently, to control target settlements in the field, there have been many studies on the comparison of settlements between vacuum pressure method and surcharge load method in the same conditions. In this study, the settlement characteristics of soil subjected to vacuum pressure and surcharge pressure are discussed. The results indicate that if vacuum pressure is applied to the improvement of soft ground, there will be inward lateral displacement and the vacuum pressure will induce generally less settlement than a surcharge load of the same magnitude. The range of settlement reduction ratio is 0.54~0.67 based on Hooke's law, 0.91 based on field cases, 0.81 based on laboratory oedometer tests, 0.75 based on the theory of elasticity and coefficient of volumetric compressibility and 0.77~0.93 in its recent applications to the thick soft ground.
Keywords
Suction drain method; Vacuum consolidation; Settlement reduction ratio; Soft ground;
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