斜向水泥土桩加固路基室内模型试验研究

通过室内模型试验研究斜向水泥土桩加固技术的工作机理是一种比较有效的方法,在国内尚无先例。此次模型试验设计,主要考虑在线路荷载作用下路基本体的沉降变形相似和桩体材料的刚度相似两个方面出发,共设计了8组模型试验,通过模型试验研究了路基顶面沉降变化规律、路基边坡位移变形规律、路基土体内部竖向应力分布规律及水泥土桩体受力变形特征,得到了一系列有价值的结论。

Laboratory Model Experiment Research of Using Oblique Soil-Cement Mixed Pile for Subgrade Strengthening

It was a relatively effective method to do laboratory model experiment for the researching of the working mechanism of strengthening technology with oblique soil-cement mixed pile,and there was no precedent in China.For this laboratory model experiment,two aspects were emphatically considered,including the similarity of settlement deformations of subgrade soil body materials,and the similarity of the rigidities of pile body materials under the action of track roads;and a total of eight groups of model experiments were designed.Through this model experiment,relevant issues were researched including the change rule of subgrade top surface settlement,the rule of subgrade side slope displacement deformation,the rule of vertical stress distribution within subgrade soil body,and the stress deformation behavior of soil-cement mixed pile.As a result,a series of valuable conclusions were drawn from this experiment.