从长期效益考虑,针对红层软岩的工程性质,利用广泛的调查研究资料,分析了高速公路高填方路段的技术经济影响因素,构建了路堤与桥梁方案评价的指标体系,并利用灰色关联度作为测度进行综合评价,得到了路堤与桥梁相比的合理填方高度,为西部红层软岩地区高速公路的设计和施工提供有益参考。 Considering the long-term benefits, aiming at the engineering properties of red-bedded soft rock and using extensive research data, the paper analyzes the technical and economic factors affecting the high-fill section of expressway and constructs the index system of embankment and bridge scheme evaluation. Degree as a measure to make a comprehensive evaluation. The reasonable embankment height compared with the bridge is obtained, which provides a useful reference for the design and construction of expressway in the soft rock area of ​​the western red beds.