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<p>This study investigates loess from the Zizhou area in Yulin, Shaanxi, China, by establishing an analytical model and a three-dimensional analysis model of the loess foundation tamping process. The process was simulated using the ABAQUS finite element analysis software. Through numerical simulations, theoretical calculations and onsite measurements, the effects of reinforcing a loess foundation and its settlement under different combinations of hammer diameter and drop height, soil depths, and hammer diameters were compared. The results demonstrate that the theoretical calculations and numerical models are applicable to loess foundation tamping. The findings demonstrate that 1) at the same energy level, the horizontal reinforcement distance of the loess foundation exhibits a semi-elliptical pattern along the depth, and the growth rate of foundation settlement initially increases and then decreases as the hammer energy level rises; 2) when only the hammer energy level changes while other parameters remain unchanged, soil settlement is positively correlated with the energy level. However, as the energy level increases, the rate of increase in settlement and reinforcement distance gradually diminishes; and 3) based on simulations and a comparative analysis of single- and seven-strike scenarios, the horizontal displacement of the soil surrounding the hammer is positively correlated with the number of strikes. Moreover, as the contact time between the hammer and the foundation increases, both vertical and horizontal displacements also increase.</p>

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Numerical Simulation of Loess Foundation Behaviour Under High-Energy Dynamic Compaction Based on Experimental Data

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Weijie Chao,
  • Yukai Niu,
  • Sen Zhang,
  • Boyou Gong

摘要

This study investigates loess from the Zizhou area in Yulin, Shaanxi, China, by establishing an analytical model and a three-dimensional analysis model of the loess foundation tamping process. The process was simulated using the ABAQUS finite element analysis software. Through numerical simulations, theoretical calculations and onsite measurements, the effects of reinforcing a loess foundation and its settlement under different combinations of hammer diameter and drop height, soil depths, and hammer diameters were compared. The results demonstrate that the theoretical calculations and numerical models are applicable to loess foundation tamping. The findings demonstrate that 1) at the same energy level, the horizontal reinforcement distance of the loess foundation exhibits a semi-elliptical pattern along the depth, and the growth rate of foundation settlement initially increases and then decreases as the hammer energy level rises; 2) when only the hammer energy level changes while other parameters remain unchanged, soil settlement is positively correlated with the energy level. However, as the energy level increases, the rate of increase in settlement and reinforcement distance gradually diminishes; and 3) based on simulations and a comparative analysis of single- and seven-strike scenarios, the horizontal displacement of the soil surrounding the hammer is positively correlated with the number of strikes. Moreover, as the contact time between the hammer and the foundation increases, both vertical and horizontal displacements also increase.