{"title":"Uphill excavation of an escalator barrel between operational underground platforms","authors":"Sebastian Kumpfmueller, A. Nasekhian, P. Dryden","doi":"10.1680/jcien.22.00042","DOIUrl":null,"url":null,"abstract":"A new underground triple escalator has been provided at Bank Station in London as part of a major capacity upgrade project. Unusually the inclined excavator tunnel was excavated uphill rather than downhill due restricted access. Using a sprayed concrete lining and no pilot tunnel, it was a first in the UK for a triple escalator. The new escalator intercepted several existing structures which had to be backfilled and then broken out, some just 0.5 m from operational Tube lines. This paper sets out design considerations, construction sequence decisions, operational risk management and discusses the existing assets’ response to uphill tunnelling based on a comprehensive monitoring scheme.","PeriodicalId":54573,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Civil Engineering","volume":"25 1","pages":""},"PeriodicalIF":0.4000,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Institution of Civil Engineers-Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jcien.22.00042","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 1
Abstract
A new underground triple escalator has been provided at Bank Station in London as part of a major capacity upgrade project. Unusually the inclined excavator tunnel was excavated uphill rather than downhill due restricted access. Using a sprayed concrete lining and no pilot tunnel, it was a first in the UK for a triple escalator. The new escalator intercepted several existing structures which had to be backfilled and then broken out, some just 0.5 m from operational Tube lines. This paper sets out design considerations, construction sequence decisions, operational risk management and discusses the existing assets’ response to uphill tunnelling based on a comprehensive monitoring scheme.
期刊介绍：
Civil Engineering, listed by the Web of Science, is the ICE''s flagship journal. Practical and diverse in its scope, it publishes overview papers for the non-specialist on any subject relevant to civil engineering today. Topics range from landmark projects to philosophical, ethical, environmental, management and safety issues.
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