沪杭高铁上跨地铁9号线钢套管旋压钻孔灌注桩施工技术

Bored Grouting Piles Construction Technology of Steel Tube Spinning on Shanghai-Hangzhou High-speed Railway Overpass Metro Line 9

通过钻孔灌注桩施工方法的对比分析,选择最佳的成孔方式,结合钢套管的特性对钢套管进行了设计,确定了合理的套管旋进深度和壁厚,解决了沪杭高铁路基段近距离上跨轨道交通9号线钻孔灌注桩钢套管施工的技术难题,满足了路基段桩板梁结构施工的要求,保证了地铁隧道的运营安全。

Through the comparative analysis of bbored grouting piles construction method, the optimal pore forming way is chosen. Based on the property of steel casing, the reasonable easing depth and thickness of precession is determined which solves the technical problems of Shanghai-Hangzhou High-speed Railway roodbed overpass rail transit line 9 at close distance. Thus the demand of the piles construction of subgrade section is satisfied, and it can ensure the operation safety of subway tunnel.