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深厚软土地基上修建铁路路堤存在稳定性和沉降两大问题,在其上修建客运专线时沉降成为关键控制因素。采用有限元分析不同施工参数及处理措施情况下深厚软土地基的沉降特性,是一种快速、经济、有效的分析方法,可为深厚软土地基工程实践提供重要参考。文中采用PDSS2000软件分析了福厦线深厚软土地基天然状态、袋装砂井、粉喷桩、粉喷桩结合袋装砂井几种工况的沉降特性,从而指导设计、施工。
There are two major problems in stability and settlement of the railway embankment on the deep soft soil foundation. The settlement of the passenger embankment on the deep soft soil foundation becomes the key control factor. Finite element analysis of settlement parameters of deep soft soil under different construction parameters and treatment measures is a fast, economical and effective analysis method, which can provide important reference for engineering practice of deep soft soil foundation. In this paper, the PDSS2000 software was used to analyze the settlement status of several natural conditions of deep soft soil foundation such as Fuxia-Xiamen Line, bagged sand well, DJM pile and DJM combined with bagged sand well to guide the design and construction.