吹填路基高压差动力降水单点夯击击密过程数值模拟分析
Numerical Simulation and Analysis of Single-Point Tamping Compaction Process of High-Pressure Differential Dynamic Precipitation for Hydraulic Fill Subgrade

高压差动力降水击密法是一种结合真空降水与动力固结技术的新型快速动力排水固结法。本文采用FLAC3D6.0进行数值模拟分析，对单点夯击下高压差动力降水击密法处理吹填路基的沉降特性及夯击效果进行研究，进而揭示高压差动力降水击密法的加固机理。研究结果表明：根据孔隙压力影响范围判断强夯有效加固深度具有一定可行性；随着夯击次数的增加，最大竖向动应力峰值增大，超孔隙水压峰值逐渐降低，夯沉最终位移逐渐增大，但增大幅度逐渐减小。研究结果对现场施工效果具有参考价值。
The high-pressure differential dynamic precipitation compaction method is a novel and rapid dynamic consolidation technique that combines vacuum water drainage with dynamic consolidation technology. In this study, numerical simulation analysis was conducted using FLAC3D 6.0 to investigate the settlement characteristics and compaction effects of the high-pressure differential dynamic precipitation compaction method with single-point compaction for hydraulic fill subgrade. This research aims to uncover the reinforcement mechanism of the high-pressure differential power water injection compaction method. The results indicate that determining the effective reinforcement depth through the range of pore pressure influence is feasible. As the number of compaction cycles increases, the maximum vertical dynamic stress peak increases, the peak excess pore pressure gradually decreases, and the final settlement displacement gradually increases, but the rate of increase diminishes. These research findings offer valuable insights for practical construction outcomes.