真空预压地基处理的加固深度研究

Research on Reinforcement Depth for Foundation Treatment by Vacuum Preloading

随着沿海经济的发展,软土处理的需求加大,真空预压处理软土有着比较大的优势,被广泛运用。但在真空预压的影响深度方面,目前学术界研究的较少,没有给出一个明确的结论。文章从土体三维固结出发,分析土体受力不但在微观上的等向受力,在宏观上受到真空压力差的影响,而且真空压力差增加了真空度的影响深度。同时结合工程实例,分析现场监测数据,得出真空预压影响深度可以达到排水板底部。

With the development of economy in coastal areas, the requirement of soft-soil treatment is much larger. As vacuum preloading has greater advantage for the soft-soil treatment, so it is widely used. But the research on the influencing depth of the vacuum preloading is little, and there is no definite conclusion. Here, the stressing conditions of soil are analyzed from microcosm and macrocosm based on 3-dimensional consolidation. The difference of vacuum pressure causes much deeper influence. Combined with engineering examples, the conclusion is got that the influencing depth of the vacuum preloading could reach to the end of plastic drainage board by analysing the monitoring data.