【摘要】 为了研究夯扩挤密法的加固机理和夯扩挤密的有效挤密范围,根据模型试验的相似定理,采用模型夯锤,进行夯扩挤密法加固黄土地基室内模型试验。试验结果显示,通过对挤密系数、压实系数及孔隙比等参数进行对比分析,夯扩挤密法对于桩间土的挤密效果随着桩间距的增大而减弱,夯扩挤密法合理的桩间距在2.5~3d(d为预钻孔直径),当夯击能提高后,桩间距可做适当扩大。更多还原

【Abstract】 In order to analyze the mechanism and squeezing effects of down hole deep compaction pile on the collapsible loess foundation,a series of model tests based on the similarity theory are conducted a in a model box. Based on analyses of void ratio,coefficient of compactness,and so on,the conclusion can be drawn that the squeezing effects of the soil between piles will be weakened with the increasing spacing between piles. The research results show that the reasonable spacing is between 2. 5 d and 3 d( d is the diameter of the pile hole). The spacing between piles can be increased accordingly when the compact energy is enhanced.更多还原