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Case study on pile running during the driving process of large-diameter pipe piles |
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| Authors: | Liqiang Sun Yandi Wang Shuwang Yan Jian Chu Xiaoqiang Liu |
| Institution: | 1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, China;2. School of Civil Engineering, Tianjin University, Tianjin, China;3. School of Civil &4. Environmental Engineering, Nanyang Technological University Singapore;5. Tianjin Research Institute for Water Transport Engineering, Tianjin, China |
| Abstract: | The super-long and large-diameter steel pipe piles are often adopted for the construction of offshore oil platforms in deep sea. One constructability issue related to driving heavy pipe piles is the pile running. The term pile running refers to the quick penetration of a pile into the seabed as a result of its high self-weight and low resistance from the seabed. The unexpected pile running can cause the steel wire of the hammer to break or even the loss of the hammer. A case study of pile running at an oil platform is introduced in this paper. A simplified theoretical method is proposed to explain the mechanisms of the pile running in this case. A factor of friction degradation is proposed to calculate the dynamic skin friction from the static ultimate skin friction of surrounding soil. The comparisons between the predictions to the case history show that the proposed simplified method can be used to predict the pile running condition. |
| Keywords: | CPTU pile driven pile running pipe pile |