真空—堆载联合预压加固软基技术 ,应用于高速公路软基处理 ,具有路基填筑速度快 ,稳定性好 ,并可减少工后沉降等特点 ,但由于该技术目前尚无完善的设计和施工规范 ,因此限制了该技术的应用。以新台高速公路实际施工情况为背景 ,较详细地分析了地基中砂层、袋装砂井深度、排水滤管布置形式及路基填筑等对膜下真空度的影响 ,并在施工过程中不断改进 ,取得了比较满意的结果 Vacuum-pile preloading consolidation soft foundation technology, applied to soft ground treatment of expressways, with embankment filling speed, good stability, and can reduce post-construction settlement and other characteristics, but the technology is currently no perfect design And construction specifications, thus limiting the application of the technology. Taking the actual construction condition of Xintai Expressway as a background, the influence of subsoil vacuum on the sand bed, the depth of bagged sand well, the arrangement of drainage pipe and the embankment filling are analyzed in detail in detail and the construction process is continued Improve, and achieved satisfactory results