Preview

Author(s):
Title:
Abstract:	Crossrail, a new 120 km long railway line, is currently the largest infrastructure project in Europe with a volume of about GBP 15 billion. Contract C510 includes the new Liverpool Street station in the City of London using the sprayed concrete lining method. The station tunnels were excavated in close proximity to a dense network of existing tunnels. The multi-storey office buildings on the densely built up surface include some listed buildings. The aim of compensation grouting in the first place was to avoid settlement due to tunnel construction altogether, or at least minimise the impact within defined limits. Remediation of settlement which occurred regardless was only anticipated in extraordinary circumstances. This paper highlights the difficulties of balancing the desired control of settlement by means of compensation grouting against adverse effects on adjacent structures. The paper closes with a description of how the seemingly impossible lifting of one column eventually worked by localised grouting. Crossrail, die neue 120 km lange Eisenbahnlinie, ist mit ca. 15 Milliarden GBP Bauvolumen das derzeit größte Infrastrukturprojekt in Europa. Das Baulos C510 umfasst u. a. die neue Station Liverpool Street in der City of London, die in Spritzbetonbauweise hergestellt wurde. Die Stationstunnel wurden in unmittelbarer Nähe zu einem dichten Netz von Bestandstunneln aufgefahren. Die ebenfalls dichte oberirdische Bebauung ist teilweise denkmalgeschützt. Ziel der Hebungsinjektionen war es, das Auftreten vortriebsbedingter Setzungen und Schiefstellungen überhaupt zu vermeiden oder in definierten Grenzen zu halten. Eine Rückstellung eingetretener Setzungen war nur im Ausnahmefall vorgesehen. Dieser Beitrag beleuchtet die Schwierigkeit, die Balance zu finden zwischen wünschenswerter Setzungskontrolle mittels Hebungsinjektionen einerseits, ohne jedoch andererseits angrenzende Bereiche negativ zu beeinflussen. Abschließend wird beschrieben, wie die doch erforderliche und nicht für möglich gehaltene punktuelle Rückstellung eines Pfeilers mittels gezielter Hebungsinjektionen gelang.
Source:	Geomechanics and Tunnelling 10 (2017), No. 5
Page/s:	489-496
Language of Publication:	English/German

I would like to buy the article

You can download this article for 25 € as a PDF file (2.36 MB).
The PDF file can be read, printed and saved.
Duplication and forwarding to third parties is not allowed.

Please enter your email address now to start the order process.
The link for the download will be sent to the email address stated after the
order process has been completed.

Your email address

I am an online subscriber

As an online subscriber of the journal "Geomechanics and Tunnelling" you can access this article via Wiley Online Library.

I would like to order "Geomechanics and Tunnelling"

This article has been published in the journal "Geomechanics and Tunnelling". If you would like to learn more about the journal, you can order a free sample copy or find out more information on our website.

Prices include VAT and postage. Prices for 2017/2018.
€ Prices apply to Germany only. Subject to alterations, errors excepted.