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http://dx.doi.org/10.5389/KSAE.2009.51.5.051

Effect of Thin Wall Tube on Clay Soil Disturbance during Sampling  

Eam, Sung-Hoon (공주대학교 산업과학대학 지역건설공학)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.51, no.5, 2009 , pp. 51-58 More about this Journal
Abstract
The total recovery ratio test on undisturbed clay soil sampling in the field and the finite element method analysis on modified static state of penetration process were conducted for the purpose of deciding the most important factor among the shape factors of thin wall tube. The adhesion between tube wall and soil did not decrease although internal clearance ratio of tube increased within the little change of tube area ratio. The most part of disturbance occurred in the tip of sampling tube during the penetration. The longitudinal displacement was larger than the lateral displacement because soil was confined laterally after being entered into tube, and also the longitudinal displacement was larger in the upper part of the sample tube than in the lower part.
Keywords
Thin wall tube; inside clearance; area ratio; sample disturbance; numerical analysis;
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