隧道预留超近距离地铁盾构穿越条件研究

结合上海市迎宾三路隧道需预留超近距离地铁盾构穿越工程实例,对该穿越节点基坑支护方案进行比选,采用了超短地下连续墙与长SMW工法桩相结合的基坑支护方案,并在设计中采取一系列综合措施,既预留了盾构顺利下穿条件,同时确保了隧道基坑施工及后期安全,对今后类似工程具有一定参考价值.

Study on Metro Shield Crossing Condition in Ultra Closed Distance to Be Reserved in Tunnel

Combined with the case of the metro shield crossing project in ultra closed distance required to be reserved in Yingbin No.3 Road of Shanghai,the article compares and selects the foundation pit supporting scheme of crossing node,adopts the pit supporting scheme combining the ultra-short diaphragm retaining walls with the long pile of SMW working process,and takes a serial of comprehensive measures in the design not only to reserve the smooth underpassing condition of shield,but also to ensure the pit construction and post-construction security of tunnel,which can be referred for the similar projects.