吹填路基高压差动力降水击密过程影响因素分析

Analysis of Influencing Factors on Compaction Process of High-Pressure Differential Dynamic Precipitation for Hydraulic Fill Subgrade

本文建立了单点夯击 高压差动力降水处理吹填路基的数值分析模型,设置了不同地下降水面和夯击能,分析了夯后夯沉量和孔压效应。研究结果表明:在夯击能相同时,采用重锤轻击比轻锤重击得到的夯击位移量要大,超孔隙水压数值要低;在单点夯击作用时,在一定的降水深度下,降低上部土体水位,可有效减缓土体塑性体积变化量。研究结果对高压差动力降水击密法在现场施工中的应用具有指导意义。

This paper establishes a numerical analysis model for hydraulic fill subgrade using single-point compaction combined with high-pressure differential dynamic precipitation. Different underground water levels and compaction energies are considered to analyze post-compaction settlement and pore pressure effects. The research findings indicate that, with the same compaction energy, greater compaction displacement and lower excess pore pressure values are achieved using a heavy hammer for light compaction compared to a light hammer for heavy compaction. During single-point compaction, at a certain depth of water table lowering, reducing the water level in the upper soil can effectively mitigate the volume change of the soil’s plasticity. The results of this study provide guidance for the practical application of the high-pressure differential dynamic precipitation compaction method in field construction.