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Prediction of ground-borne vibration induced by impact pile driving: numerical approach and experimental validation
Earthquake Engineering and Engineering Vibration ( IF 2.8 ) Pub Date : 2023-10-24 , DOI: 10.1007/s11803-023-2216-6
A. Colaço , P. Alves Costa , C. Ferreira , C. Parente , J. Fernandez-Ruiz

Deep foundations are currently used in engineering practice to solve problems caused by weak geotechnical characteristics of the ground. Impact pile driving is an interesting and viable solution from economic and technical points of view. However, it is necessary to ensure that the environmental drawbacks, namely ground-borne vibration, are adequately met. For this purpose, the authors propose an axisymmetric finite element method-perfectly matched layer (FEM-PML) approach, where the nonlinear behavior of the soil is addressed through an equivalent linear methodology. Given the complexity of the problem, an experimental test site was developed and fully characterized. The experimental work comprised in-situ and laboratory soil characterization, as well as the measurement of vibrations induced during pile driving. The comparison between experimental and numerical results demonstrated a very good agreement, from which it can be concluded that the proposed numerical approach is suitable for the prediction of vibrations induced by impact pile driving. The experimental database is available as supplemental data and may be used by other researchers in the validation of their prediction models.



中文翻译:

冲击打桩引起的地面振动预测:数值方法和实验验证

目前工程实践中多采用深基础来解决因地面弱岩土特性引起的问题。从经济和技术角度来看,冲击打桩是一种有趣且可行的解决方案。然而,有必要确保充分解决环境缺陷,即地面振动。为此,作者提出了一种轴对称有限元法 - 完美匹配层 (FEM-PML) 方法,其中通过等效线性方法解决土壤的非线性行为。鉴于问题的复杂性,开发了一个实验测试站点并对其进行了全面表征。实验工作包括现场和实验室土壤表征,以及打桩过程中引起的振动的测量。实验结果与数值结果之间的比较显示出非常好的一致性,由此可以得出结论,所提出的数值方法适用于预测冲击打桩引起的振动。实验数据库可作为补充数据,可供其他研究人员用于验证其预测模型。

更新日期:2023-10-25
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