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以郑西客运专线湿陷性黄土地基路段为背景,对比分析顶置分幅式路基桩板结构方案、桥梁结构方案和桩网结构复合地基方案的技术、经济指标,论证桩板结构处理困难地基路段在技术上的可行性和经济上的优越性,探讨桩板结构的应用前景。顶置分幅式路基桩板结构作为穿越困难地基路段的线路结构物,较好地解决了在技术要求高、工期短、不可预见因素多等复杂施工环境下的沉降控制难题。在郑西客运专线湿陷性黄土地基路段,与桥梁结构和桩网结构复合地基相比,顶置分幅式路基桩板结构分别节省了40%和30%的投资,具有显著的技术经济优势及广泛的应用前景。
Taking the section of collapsible loess foundation in Zheng-Xi Passenger Special Line as the background, the technical and economic indexes of overhead subgrade-based subsoil pile structure plan, bridge structure plan and pile-net structure composite foundation plan are contrasted and analyzed. Road section in terms of technical feasibility and economic superiority, discusses the application of pile-plate structure. The top-mounted sub-grade roadbed pile structure, as a line structure crossing the difficult foundation section, solves the problem of settlement control in complex construction environments with high technical requirements, short construction period and unforeseen factors. In the section of collapsible loess foundation of Zheng-Xi Passenger Special Line, compared with the bridge structure and the composite foundation of the pile-net structure, the roof-mounted sub-grade embankment pile structure saves 40% and 30% of the investment, respectively, with significant technical and economic advantages And a wide range of applications.