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利用爆破产生能量可进行软基处理,但不同药量、不同药包埋设深度下爆坑形态和土体属性变化会存在差异。采用基于欧拉法的爆炸流体动力学数值模拟技术对土中爆破问题进行了分析,结果表明,最终爆坑形态与已有试验成果具有较好一致性;爆坑直径与药量和埋药深度存在一定的非线性关系;爆炸荷载在近域传播与冲击波类似,随着远离药包中心,则表现为应力波特征;随埋药深度增加,爆破挤密效果明显,但浅层爆破对土体挤密效果有限。
The energy of blasting can be used for soft foundation treatment. However, there are differences in the shapes of embankment and soil properties under different doses and embedding depths. The blasting problem in the soil was analyzed by using the numerical simulation method of explosive fluid dynamics based on the Eulerian law. The results show that the shape of the final blasting pit is in good agreement with the existing experimental results. The diameter of the blasting pit, the dose and the embedding depth There is a certain non-linear relationship; the explosion load is similar to the shock wave propagation in the near-field, with the characteristics of stress wave as it goes away from the center of the kits; the effect of blasting and compaction is obvious with the increase of the buried depth, Crowding effect is limited.