粉喷桩加固路基的横向沉降差比较分析

粉喷桩作为地基加固方法,具有很多的优越性。但是,由于理论研究的滞后,使粉喷桩不能得到合理的应用。公路路基是柔性基础,变形特点与刚性基础下的粉喷桩复合地基不同;沿横断面不同位置粉喷桩的加固效果不同。文中以山东省淄博—滨州高速公路试验段为例,用Flac-3D国际通用程序计算了高填土路堤下粉喷桩复合地基沿横断面的沉降值,并与没有加固的情况作对比,分析了粉喷桩改善路堤沉降的特点,为提高设计质量和施工水平提供理论依据。

Analysis on settlement difference of DJMP subgrade section

Dry jet mixing pile, which is a new technique of reinforcing foundation, has a lot of advantages. With the construction of numerous foundation projects, the application and development of DJMP is more extensive. But dry jet mixing pile can not be used rationally because of sluggish and unmature in theory. Road sub-grade is flexible, which has different transformation feature from DJMP compound sub-grade under rigid foundation. This paper is based on trial segment of zibo-binzhou highway in Shandong province. Flac-3D procession is used to calculate the settlement difference of DJMP composite basement. The analysis about the law of settlement provides theory basis for design and construction.