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<p>For the complex dynamic model of pile driving impact, there are many parameters in the system, so it is difficult to study the parameters of the&#xa0;pile driving impact system comprehensively and accurately. Given the normal construction of the hydraulic pile driving, this paper proposes a general dynamic model, namely the&#xa0;Ram-Damping Ram Cushion-Anvil-Damping Pile Cushion-Pile (R-DRC-A-DPC-P) model, which can be easily&#xa0;simplified into other existing typical models. For&#xa0;the R-DRC-A-DPC-P model, the Laplace transform expressions of dimensionless impact force on the pile head in each movement stage of the system are derived. It is found that if the Laplace transformation of dimensionless impact force is taken as a function <i>G</i>, then the unit impulse response of <i>G</i> is equivalent to the dimensionless impact force response. With this approach, the impact force can be computed quickly and comprehensive parametric studies can be realized easily. Taking the energy transfer efficiency of the pile driving impact system and the peak value of the dimensionless impact force as the reference indeces, this paper presents a comprehensive analysis and summary of the parameters of the proposed R-DRC-A-DPC-P as well as other typical models. Besides, the performance of these systems is compared and analyzed, and the recommended ranges of&#xa0;parameters and the key points in designing them are summarized.</p>

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Comprehensive Parametric Study of Hammer Impact in Pile Driving Based on a General Analytical Dynamic Model

  • 期刊论文

  • 发表日期：

    2025年2月18日

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  • Yuantao Sun,
  • Jinjin Zhai,
  • Lifu Luo,
  • Xianrong Qin,
  • Qing Zhang

摘要

For the complex dynamic model of pile driving impact, there are many parameters in the system, so it is difficult to study the parameters of the pile driving impact system comprehensively and accurately. Given the normal construction of the hydraulic pile driving, this paper proposes a general dynamic model, namely the Ram-Damping Ram Cushion-Anvil-Damping Pile Cushion-Pile (R-DRC-A-DPC-P) model, which can be easily simplified into other existing typical models. For the R-DRC-A-DPC-P model, the Laplace transform expressions of dimensionless impact force on the pile head in each movement stage of the system are derived. It is found that if the Laplace transformation of dimensionless impact force is taken as a function G, then the unit impulse response of G is equivalent to the dimensionless impact force response. With this approach, the impact force can be computed quickly and comprehensive parametric studies can be realized easily. Taking the energy transfer efficiency of the pile driving impact system and the peak value of the dimensionless impact force as the reference indeces, this paper presents a comprehensive analysis and summary of the parameters of the proposed R-DRC-A-DPC-P as well as other typical models. Besides, the performance of these systems is compared and analyzed, and the recommended ranges of parameters and the key points in designing them are summarized.