北翟路地道上穿规划地铁隧道的节点设计

Node Design of Beidi Road Tunnel Overpassing Planned Metro Tunnel

上穿地道施工后,远期地铁盾构掘进势必对已建隧道产生影响。对上海北翟路上穿规划16号线节点建立了数值模型,分析了盾构掘进对已建地道的影响,为节点设计提供一定参考。在该节点详细设计时,宜将结构变形缝设置在盾构穿越范围之外,且应考虑加强的抗剪构造和防水措施。地道基坑施工时,格构柱和底板泄水孔布置尽量避让规划地铁线路。地道围护设计时,应采用易于远期盾构穿越的结构型式,且宜对盾构穿越范围进行必要的加固,减少盾构掘进施工对已建地道结构的影响。

After the construction of overpassing tunnel, the long-term metro shield tunneling certainly will influence on the built tunnels. The numerical model is established for Shanghai Beidi Road overpassing the node of planned Line 16. The article analyzes the influence of shield tunneling on the built tunnel, which provides some reference for the node design. It is suitable to install the structural deformation joint outside of shield crossing range during the detail design of this node, and it should be to consider the strengthened shear structure and waterproof measures. The layout of lattice column and bedplate drain hole dodges the planned metro line as far as possible in the construction of tunnel pit. It should be to use the structural shape suitable for crossing of long-term shield in the design of tunnel enclosure. It is necessary to reinforce the crossing range of shield so as to decrease the influence of shield tunneling construction on the built tunnel structure.