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Experimental and Numerical Analysis of Bearing Capacity of Large Diameter Open-Ended Pipe Piles
Large diameter open-ended pipe piles typically refer to pipe piles with diameter larger than 76 cm (30 inches). These piles, when properly constructed, offers superior load carrying capability to traditional ones. The existing AASHTO specification for pipe piles is based on database collected from pipe piles with diameter typically less than 61 cm (24 inches). Current experience indicate that formation of soil plug due to arching effect is crucial for the bearing capacity of large diameter open-ended pipe piles to be mobilized and sustained. In this paper, the formation of soil plugging has been discussed through numerical simulation with the discrete element method (DEM). Laboratory and geotechnical centrifuge experiments are conducted to analyze the bearing resistance of pipe piles driven in sand with different pile diameter, types of restriction plate, embedment depth, etc. It is shown the formation of soil plugging is highly associated with the arching effect inside soil particles. Two types of restriction plates, i.e., 1-hole restriction plate, and 4-hole restriction plate, are compared and proved to be effective in mobilizing the formation of soil plug after pile driving.
Experimental and Numerical Analysis of Bearing Capacity of Large Diameter Open-Ended Pipe Piles
Large diameter open-ended pipe piles typically refer to pipe piles with diameter larger than 76 cm (30 inches). These piles, when properly constructed, offers superior load carrying capability to traditional ones. The existing AASHTO specification for pipe piles is based on database collected from pipe piles with diameter typically less than 61 cm (24 inches). Current experience indicate that formation of soil plug due to arching effect is crucial for the bearing capacity of large diameter open-ended pipe piles to be mobilized and sustained. In this paper, the formation of soil plugging has been discussed through numerical simulation with the discrete element method (DEM). Laboratory and geotechnical centrifuge experiments are conducted to analyze the bearing resistance of pipe piles driven in sand with different pile diameter, types of restriction plate, embedment depth, etc. It is shown the formation of soil plugging is highly associated with the arching effect inside soil particles. Two types of restriction plates, i.e., 1-hole restriction plate, and 4-hole restriction plate, are compared and proved to be effective in mobilizing the formation of soil plug after pile driving.
Experimental and Numerical Analysis of Bearing Capacity of Large Diameter Open-Ended Pipe Piles
Guo, Yuan (author) / Li, Jiale (author) / Yu, Xiong (Bill) (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 88-97
2019-03-21
Conference paper
Electronic Resource
English
Experimental and Numerical Analysis of Bearing Capacity of Large Diameter Open-Ended Pipe Piles
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