Analysis of the Dynamic Characteristics of the Top Flange Pile Driving Process of a Novel Monopile Foundation without a Transition Section

Ying Li, Jinghui Li, Wei Shi, Xin Li and Bin Wang
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Ying Li: Chinese-German Institute of Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
Jinghui Li: Deep Water Engineering Research Center, Dalian University of Technology, Dalian 116024, China
Wei Shi: Deep Water Engineering Research Center, Dalian University of Technology, Dalian 116024, China
Xin Li: School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China
Bin Wang: Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province, Hangzhou 311122, China

Sustainability, 2022, vol. 14, issue 10, 1-12

Abstract: As the most widely used foundation type, the pile-driving capacity of large-diameter monopile foundations and the hammer force of pile top flanges is increasing, as are the stress and strain of traditional flange structures under the resistance to the cyclic impact load of pile hammers. This paper conducts an empirical study on the Rudong 150 MW offshore wind farm project in Longyuan, Jiangsu Province. The numerical simulation and calculation method of large-diameter pile fatigue damage is mastered and proposed, and a simulation analysis and comparison is conducted, as is an analysis of the sensitivity and feedback of the key software parameters. Based on the results of the above analysis, a pile simulation analysis of the offshore wind power projects under construction and those that are about to be started is performed. The pile hammer stroke energy and pile top hammer stroke process curve are extracted. According to the time range curve of limit and hammer stroke forces, the flange limit stress and distribution of the pile roof are simulated. Combined with the process characteristics of large-diameter pile sinking and analysis in the case of high hammer energy and high acceleration, the effect of the impact on the sensor is discussed. The results show that the instantaneous loading analysis could load at the flange of the pile, the maximum instantaneous stress was above 500 MPa, and the final maximum stress was approximately 307 MPa. Different loading methods vary greatly in the calculation results of the structure, so choosing the appropriate loading simulation method is key to pile sinking analysis.

Keywords: large-diameter pile foundation; pile top flange; hammer force (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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