为解决盾构管片预埋槽道不可更换及全环预埋等问题，以兰州地铁2号线1期工程为例，通过理论研究和现场试验，对盾构管片外嵌式槽道技术进行研究，主要从其可行性和安全性等方面展开。研究指出： 外嵌式槽道技术不仅能满足机电设备安装的各项要求，且安装方法简单易行，在隧道内可更换和分段安装，比全环预埋槽道技术可节省成本约40%；外嵌式槽道技术不仅适合地铁或高铁盾构隧道，也适合暗挖隧道和城市综合管廊隧道，通用性强，推广意义大。

The preembedded chute for shield segment cannot be replaced resulting from fullring embedding. Hence, the technology of chute embedded outside shield segment is studied by theoretical analysis and site experiment from the aspects of feasibility and safety, by taking Phase 1 of Lanzhou Metro Line No. 2 for example. It is concluded that: (1) The technology of chute embedded outside shield segment can meet relevant requirements; it is replaceable and easy to install; and by doing which 40% cost can be reduced. (2) The technology mentioned above is feasible for metro shield tunnel, highspeed railway shield tunnel, mined tunnel and urban utility tunnels; and it is worth popularizing.