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1 前言 软土地基上的铁路路堤在目前铁路建设中造价较高且遗留问题较多,为了保持良好的运行条件,除保证路堤的稳定性外,还需保持路堤在通车运行中地基的沉降得以控制。与国外一些国家相比较,我国现行铁路路基规范标准较低,造成既有线软土路基下沉较为严重。现行《铁路路基设计规范》(TBJ1—85)中,对路堤沉降未提出要求,《铁路特殊土路基设计规
1 Preface Railway embankment on soft soil foundation has high cost and many remaining problems in the current railway construction. In order to maintain good operating conditions, in addition to the stability of the embankment, it is necessary to maintain the settlement of the foundation during the operation of the embankment control. Compared with some foreign countries, the current standard of China’s railway subgrade standards is relatively low, causing the existing soft soil subgrade to sink more seriously. In the current “code for design of railway embankment” (TBJ1-85), there is no requirement for the embankment settlement. "The design rules of special railway embankment