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Piping Analysis for Excavation in a Embankment  

Lee, Song (서울시립대학교 토목공학과)
Kook, Joong-Jin (서울시 도시교통본부 도로계획 담당관실)
Jung, Min-Hyung (서울시립대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.13, no.1, 2009 , pp. 59-68 More about this Journal
Abstract
One of the cause of embankment failure for piping is a routine design for piping consideration without exact understanding of that. Therefore, in this study, comparison and analysis of existing piping consideration methods had been conducted through embankment sections when sheet piles constructed on sandy ground. For the Terzaghi method and the critical hydraulic method, safety factors were changed up to double depending on the method. And for the critical velocity method, it was dramatically changed due to design parameters. Consequently, existing piping consideration method currently used is recommended not to be applied to all ground conditions uniformly but to applied with exact understanding of each consideration method characteristics depending on ground conditions.
Keywords
Critical hydraulic gradient; Critical velocity; Flow net; Piping;
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