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Case Study of Comparative Analysis between Static and Dynamic Loading Test of PHC Pile  

Kim, Jaehong (Infra Structure Research Center Kwater)
Yea, Geuguwen (Technology Research Department Sambu Corporation)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.11, 2013 , pp. 13-23 More about this Journal
Abstract
In the west coastal soft ground, the static and dynamic loading tests for PHC piles which were executed using light driving without injecting cement milk were carried out and the correlation was analyzed. Initial dynamic loading test used hydraulic hammer(ram weight 70kN) and final average penetration effect presented 3.0 to 8.0mm at 0.8m drop. Then final allowable bearing capacity using CAPWAP presented 776.4 to 1,053.6kN a pile. The static loading tests which were performed at the other piles loaded 200% of the design load dividing by eight phases. As the result, total settlement was 15.97 to 16.38mm and residual settlement was 4.48 to 5.38mm, but both yielding and ultimate load can't be estimated. Therefore, allowable bearing capacity was determined larger than 1,200kN a pile regarding maximum test load as yielding load. Thus, it showed that allowable bearing capacity of the dynamic loading test was larger than static loading test in 1.54 to 1.14 times.
Keywords
Driving type pile; Static loading test; Dynamic loading test; Correlation analysis; PHC pile;
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