Steep Inclined SEM Excavation-The 'Uphill Machine'-at London Crossrail: Development and Application of a Safe Excavation System in Soft Ground

摘要

Escalator tunnels for passenger station access are usually built applying declined excavation method in order to avoid excavated material from falling down along the excavated section putting individuals and plant in danger. If this method cannot be executed due to geometric or contractual restrictions a challenging situation is encountered. This was the case at the Whitechapel and Liverpool station sites at London's Crossrail, contract C510.This paper describes development of the basic idea, initial layout, final design and practical application of a mechanised uphill excavation and support system. The machine was used for excavation of multiple inclined tunnels with a 30-degree gradient.