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A Numerical Study on the Prevention of Clogging in Granular Compaction Pile  

Jeong, Jaewon (Dept. of Civil and Environmental Eng., Hanyang University)
Lee, Seungjun (Dept. of Civil and Environmental Eng., Hanyang University)
Park, Nowon (Shlnil foundation co., Ltd., Technique department)
Chun, Byungsik (Dept. of Civil and Environmental Eng., Hanyang University)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.1, 2013 , pp. 43-51 More about this Journal
Abstract
Recently, engineering problems such as long-term settlement, differential settlement, and the resultant structural damage, have been frequently reported at construction sites. Use of Sand Compaction Piles(SCP) and Granular Compaction Piles(GCP) are good at remedying existing problems, improving bearing capacity and promoting consolidation. However, such compaction piles have the potential for clogging, which would limit their usability. Investigations into the potential for clogging in SCP, GCP, and GCP mixed with sand has not been thoroughly conducted and is the objective of this current study. Large scale direct shear tests were performed on sections of SCP, GCP, and sand mixed GCP to evaluate bearing capacity. Discrete Element Method analyses were conducted with PFC3D and Finite Element Analyses were conducted with MIDAS GTS to propose an algorithm to help reduce clogging in the granular compaction piles. Results from the large scale direct shear test and multiple simulations suggest a 70% gravel and 30% sand mixing ratio to be optimal for bearing capacity and reducing clogging.
Keywords
SCP method; GCP method; Clogging; Large scale direct shear test; Discrete Element Method; Finite Element Method;
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