Three new adits were required between existing underground railway platform tunnels on the Bank station capacity upgrade project in London, UK. Normally they would have been built by traditional hand-mining techniques with temporary support from within the platform tunnels. An innovative solution, involving a mechanised sprayed concrete lining with an optimised external support system, was developed as an alternative for two of the adits. Compared to hand-mining it provided greater working space, minimised hand excavation and manual handling, kept the railway operational and reduced the programme and costs.

中文翻译：

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在英国伦敦的银行车站升级中，喷涂混凝土衬砌与传统手工开采相比

在英国伦敦的银行站容量升级项目中，现有的地下铁路平台隧道之间需要三个新的通道。通常，它们将通过传统的手工采矿技术在平台隧道内获得临时支持的情况下建造。开发了一种创新的解决方案，其中包括机械喷涂混凝土衬砌和优化的外部支撑系统，以替代其中两个凹坑。与手工开采相比，它提供了更大的工作空间，最小化了人工挖掘和人工搬运，保持了铁路的正常运行并降低了程序和成本。