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http://dx.doi.org/10.12814/jkgss.2016.15.1.021

A Study on the Pile Material Suited for Pile Supported Embankment Reinforced by Geosynthetics  

Choi, Choong-Lak (Geotechnical Engineering Depatment, Pyunghwa Engineering Consultants)
Lee, Kwang-Wu (Geotechnical Engineering Research Institute, Korea Institute of Civil engineering and building Technology)
Kim, Eun-Ho (Geotechnical Engineering Depatment, Pyunghwa Engineering Consultants)
Jung, Ji-Won (Geotechnical Engineering Depatment, Pyunghwa Engineering Consultants)
Publication Information
Journal of the Korean Geosynthetics Society / v.15, no.1, 2016 , pp. 21-35 More about this Journal
Abstract
It is a current trend that the concrete track is applied for high speed railway. In the case of the railway embankment constructed on soft ground, the damage to concrete track which is sensitive to settlement such as distortion and deflection could be caused by very small amount of long term settlement. Pile Supported Embankment method can be considered as the effective method to control the residual settlement of the railway embankment on soft ground. The Geosynthetics is used inside of the embankment to maximize the arching effect transmitting the load of the embankment to the top of the piles. But, PHC piles that are generally used for bridge structures are also applied as the pile supporting the load of embankment concentrated by the effect of the Geosynthetics. That is very low efficiency in respect of pile material. So, in this study, the cast in place concrete pile was selected as the most suitable pile type for supporting the embankment by a case study and the optimum mixing condition of concrete using a by-product of industry was induced by performing the mixing designs and the compressive strength designs. And it is shown that the cast in place pile with the optimum mixing condition using the by-product of industry is 2.8 times more efficient than the PHC pile for the purpose of Pile Supported Embankment by the finite element analysis method.
Keywords
Soft soil; Pile supported embankment; Pile material; Geo-grid;
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