古运河暗渠穿石太高速浅埋暗挖洞型结构设计

南水北调中线古运河暗渠从进口到出口依次穿越省道S101、古运河和石太高速公路，除高速公路段拱涵为浅埋暗挖法施工外，其余拱涵均为明挖施工。通过对拱涵、箱涵等洞型断面型式优选，分析不同矢跨比对拱涵内力的影响，对大孔径输水暗涵部分明挖、部分暗挖的情况，推荐采用三孔一联拱涵整体穿越的洞室布置方案。

Structure Design of Shallow Underground Excavation Cavity Form in Covered Conduit of Ancient Canal Passing Through Shijiazhuang-Taiyuan Expressway

The covered conduit of ancient canal in the Mid-Line of the South to North Water Diversion Project drilled through provincial highway S101,ancient canal and Shijiazhuang-Taiyuan Expressway in turn from inlet to outlet. Except for arch culverts in passing through expressway section using the shallow underground excavation method in construction,the rest arch culvert using the open excavation method. To select optimal sectional form (among arch culverts,box culvert,etc),we have analyzed the influence of diffe...