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本文利用模型试验开展强夯加固吹填地基土压力传递规律研究,对1000、2343.75、4687.5、9375kN·m4种夯击能作用下地基水平向和垂直向土压力进行了监测。结果表明土压力在水平方向和垂直方向均有较大幅度的衰减。水平向土压力沿深度快速衰减,7.5m深时衰减了90%左右;沿水平方向,30m后衰减90%左右。垂直向土压力在深度方向至深度为10m时,压力值较浅层衰减了75%~85%,水平方向12.5m时已衰减了80%~90%。垂直向土压力远大于水平向土压力。利用试验数据得到了土压力衰减的经验公式。该成果对强夯法在吹填地基中的应用具有重要的指导意义。
In this paper, the model tests were carried out to study the pressure transmission of the foundation soil under dynamic compaction and consolidation, and the horizontal and vertical earth pressure under the impact of 1000, 2343.75, 4687.5 and 9375 kN · m were monitored. The results show that the earth pressure has more substantial horizontal and vertical attenuation. The horizontal earth pressure rapidly attenuates along the depth and decays about 90% at 7.5m depth. At the horizontal direction, it decays about 90% after 30m. When the vertical earth pressure is in the depth direction of 10m, the pressure value declines by 75% -85% in the shallower layer and 80% -90% in the horizontal direction at 12.5m. The vertical earth pressure is much larger than the horizontal earth pressure. The empirical formula of soil pressure attenuation is obtained by using the experimental data. The results have important guiding significance for the application of dynamic compaction method in the ground filling.