Delivering the Moorgate shaft base slab on Crossrail, UK
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Published:2015-11
Issue:4
Volume:168
Page:159-169
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ISSN:0965-089X
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Container-title:Proceedings of the Institution of Civil Engineers - Civil Engineering
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language:en
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Short-container-title:Proceedings of the Institution of Civil Engineers - Civil Engineering
Author:
Douglas Adrian1,
Smith Marcus2,
Hunter Jonathan3
Affiliation:
1. Mott MacDonald Ltd, Croydon, UK
2. Bam Nutall Kier joint venture, UK
3. Crossrail Ltd, UK
Abstract
The Moorgate shaft at Crossrail Liverpool Street station is one of the deepest in London, UK. Construction of the base slab to the 42 m deep shaft required close collaboration between the client, designer, contractor and suppliers to give assurance that the slab was watertight. Dense reinforcement was detailed to ensure ease of fixing within the tight confines of the shaft and allow for the tolerance on the diaphragm walls. The concrete design was developed to ensure that it met the requirements for placing and structural strength while achieving good control on the temperature developed. The concrete mix was trialled for temperature development and initial set to allow relaxation of the original specification. The pour plan was developed with the co-operation of all the site teams to ensure appropriate contingency measures were in place. Temperature monitoring was carried out to ensure that mitigation measures could be applied to control placed concrete temperature against predetermined trigger levels.
Publisher
Thomas Telford Ltd.
Subject
Civil and Structural Engineering
Cited by
2 articles.
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1. Crossrail project: logistics management strategy for the Elizabeth line, London;Proceedings of the Institution of Civil Engineers - Civil Engineering;2017-05
2. Editorial;Proceedings of the Institution of Civil Engineers - Civil Engineering;2015-11