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http://dx.doi.org/10.7843/kgs.2018.34.7.39

Investigation of Axially Loaded Jacked Pile Behavior by Pile Load Test  

Baek, Sung-Ha (Dept. of Civil & Environmental Engrg., Gachon Univ.)
Do, Eun-Su (Infra Engrg. Team, SK Eng. & Construction Co.)
Kim, Seok-Jung (Seismic Safety Research Center, Korea Inst. of Civil Eng. and Building Tech.)
Publication Information
Journal of the Korean Geotechnical Society / v.34, no.7, 2018 , pp. 39-49 More about this Journal
Abstract
Jacked pile that involves the use of hydraulic jacks to press the piles into the ground is free from noise and vibration, and is possibly installed within a limited construction area. Thus, as an alternative to conventional pile driving methods, pile jacking could become widely accepted for the construction projects in urban area (e.g., reconstruction or remodeling construction projects). Great concern has arisen over the prediction of axially loaded jacked pile behavior. Against this background, a series of pile load tests were hence conducted on a jacked steel pipe pile installed in weathered zone (i.e., weathered soil and weathered rock). From the test results, base resistance and shaft resistance for each test condition were evaluated and compared with the values predicted by the previous driven pile resistance assessment method. Test results showed that the previous driven pile resistance assessment method highly underestimated both the base and shaft resistances of a jacked pile; differences were more obviously observed with the shaft resistance. The reason for this discrepancy is that a driven pile normally experiences a larger number of loading/unloading cycles during installation, and therefore shows significantly degraded stiffness of surrounding soil. Based on the results of the pile load tests, particular attention was given to the modification of the previous driven pile resistance assessment method for investigating the axially loaded jacked pile behavior.
Keywords
Jacked pile; Steel Pipe pile; Pile load test; Bearing capacity; Weathered zone;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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