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http://dx.doi.org/10.7843/kgs.2006.22.12.33

Model Tests on a Plastic Pipe Pile for the Analysis of Noise, Energy Transfer Effect and Bearing Capacity due to Hammer Cushion Materials  

Lim, Yu-Jin (Dept. of Civil Engrg., and Railroad Engg., PaiChai Univ.)
Hwang, Kwang-Ho (Nau E&G)
Park, Young-Ho (Highway & Transportation Research Institute, Korea Highway Corporation)
Lee, Jin-Gul (Electric. Eng., PaiChai Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.12, 2006 , pp. 33-43 More about this Journal
Abstract
Driving tests using model plastic piles with different hammer cushion materials were performed in order to evaluate the efficiency of energy transfer ratio from the hammer, degree of vibration of the surrounding ground and noise due to impacting. A small pile driving analyzer (PDA) was composed using straingages and Hopkinson bar which is measuring force signal and pile-head velocity. The hammer cushion (cap block) materials used for the model driving tests were commercial Micarta, plywood, polyurethane, rubber (SBR) and silicone rubber. The highest energy transfer ratio was obtained from Micarta in the same soil and driving conditions. Micarta was followed by polyurethane, plywood, rubber and silicone in descending order. The more efficient energy transfdr ratio of the hammer cushion materials became, the bigger average noisy (sound) level was found. In addition, Micarta and polyurethane provided bigger bearing capacities than other materials compared in the same soil and driving conditions in which the static loading tests were performed at the end of driving.
Keywords
Energy transfer ratio; Hammer cushion; Model pile; Pile driving;
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