摘要
由于现场地形地质条件变化,拍盘隧道进口端采取"桥入隧道"方案,将原连拱结构变更为"上下双层桥隧混合异形隧道结构":即上层为双洞单跨隧道+下层为箱梁和上层为双洞连拱隧道+下层为桥台的两种异形结构。该型结构最大开挖跨径达25.77m,最大开挖高度17.25m,矢跨比仅为0.356,断面面积达346.6m2。这种桥隧混合异型结构的设计合理布置了洞口两端的桥梁和隧道结构,为特殊条件下的桥隧相接工程建设提供了一种新型的解决方案。
Due to topographic and geologic conditions of the site changes,making imports side dish to take the tunnel ' bridge into the tunnel' program,the original double-arch structure has been changed to ' mixed-down two-tier bridge and tunnel shaped tunnel structure':that is the upper pairs of holes for the lower single-span tunnel & box girder and the upper pairs of holes for the lower arch tunnel & abutment of the two kinds of special-shaped structure.This type of structure,the largest excavation span up to 25.77m,Maximum digging height of 17.25m,span ratio is only 0.356,the cross section area of 346.6m2.The bridge and tunnel shaped structure,the design of mixed rational arrangement of the holes at both ends of the bridge and tunnel structures,for the special conditions of the bridge and tunnel construction phase provides a new solution.
出处
《建筑监督检测与造价》
2009年第Z1期58-62,共5页
Supervision Test and Cost of Construction
关键词
隧道
桥隧相接
超大断面
连拱
设计
Tunnel
bridge and tunnel connecting
large cross-section
even the arch
Design
