本文结合南京鼓楼地下立交工程施工实例,阐述了在动载条件下、超浅埋、大跨度、富水、 软岩的隧道工程初期支护及其参数的选定,以达到经济实用的目的。

Combined w ith a co nst ructio n ex ample o f Gulou underg ro und engineering in Nanjing , the paper describes the tunnel engineering early protectio n a nd i ts index es o n specia l conditions- such as shake-fo rce, super-shallow-underg ro und, g reat-span, fill-wa ter and sof trock, for economic and practical purpose.