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针对湿陷性黄土地基较为软弱的不足,通常会采用灰土挤密桩法解决,简单来讲,灰土挤密桩法即通过一定的方法将灰土填入桩孔中,然后务实,形成桩体,与桩间土构成复合地基,一方面可有效消除地基的湿陷性,另一方面通过挤密改善地基土的结构、密度使地基的承载力有所加强,以达到减小地基变形的目的。该方法实用性较强,成本低、施工快,具有良好的社会效益,应用十分广泛。本文主要对其加固机理和施工方法进行了分析。
In view of the weakness of the collapsible loess foundation, the method of lime-soil compaction pile is usually adopted. In simple terms, the lime-soil compaction pile method is that the lime soil is filled into the pile hole by a certain method and then piled up, On the one hand, it can effectively eliminate the collapsibility of the foundation; on the other hand, the structure and density of the foundation soil are improved by the compaction so that the bearing capacity of the foundation is strengthened so as to reduce the deformation of the foundation. The method has strong practicability, low cost, quick construction, good social benefits and a wide range of applications. This paper mainly analyzes the reinforcement mechanism and construction method.