Crossrail Ltd

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United Kingdom
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Barsam J.-M.,Halcrow Group Ltd. | Harris D.,Mott MacDonald Ltd. | Hooper A.,Crossrail Ltd
Proceedings of the Institution of Civil Engineers: Civil Engineering | Year: 2017

This paper describes the design management for the central tunnelled section of the £14·8 billion Crossrail project to deliver the Elizabeth line east-west railway across London. It explains why the processes, procedures and areas of responsibilities of the designers and employer needed to be robust and resilient to cope with the levels of design change experienced at all stages of the project. In particular, it shows how the size and procurement of design packages required careful management of numerous interfaces and the challenges this posed. © 2017, ICE Publishing. All rights reserved.


Tucker W.,Bechtel Corporation | Tucker W.,Crossrail Ltd
Proceedings of the Institution of Civil Engineers: Civil Engineering | Year: 2017

Crossrail, the project to deliver the Elizabeth line east-west railway across London, is the largest construction project in Europe. The Crossrail Act 2008 outlined the principles of an execution strategy for delivery of the 10 year programme, which will see the new line fully operational in 2019. At the heart of the strategy was a vision for how the railway would be delivered through best practice and responsible procurement, via a project delivery partner, a programme partner, designers and contractors as well as development agreements with key stakeholders. From 2008 through completion of tunnelling in 2015 and into systems and architectural finishing works, this vision has remained constant. This paper outlines the execution strategy and how it came to remain intact as a basis of delivery throughout the life of the project. © 2017, ICE Publishing. All rights reserved.


Fraser D.,Crossrail Ltd | Haig J.,Crossrail Ltd and Unipart Ltd | Heduan M.,AECOM Technology Corporation | Limna G.,Crossrail Ltd
Proceedings of the Institution of Civil Engineers: Civil Engineering | Year: 2017

The scale, complexity and geography of the Crossrail project to deliver the 118 km Elizabeth line across London, UK, presented a challenge to manage the hundreds of thousands of vehicle movements needed to support construction. It also presented an opportunity to implement a project-wide logistics strategy that would set a standard for activities outside the gate, leave a new benchmark in construction road safety management and demonstrate to external stakeholders that the many elements of the project could act collectively. This paper describes the scope of the logistics strategy, the challenges faced in its implementation and the measures employed to make it a success. © 2017, ICE Publishing. All rights reserved.


Aldiss D.T.,British Geological Survey | Black M.G.,Crossrail Ltd | Entwisle D.C.,British Geological Survey | Page D.P.,OtB Engineering UK LLP | Terrington R.L.,British Geological Survey
Quarterly Journal of Engineering Geology and Hydrogeology | Year: 2012

In the design of major construction works, the better the ground conditions are known, the more control there is on the assessment of risks for construction, contract and personnel, and ultimately on final costs. Understanding of the ground conditions is usually expressed as a conceptual ground model that is informed by the results of desk study and of dedicated ground investigation. Using the GSI3D software, a 3D geological model (a model composed of attributed solid volumes, rather than of surfaces) can be constructed that exactly honours geologists' interpretations of the data. The data are used in their true 3D position. The 3D model of faulted Lambeth Group (Palaeogene) strata in the area of the proposed new Crossrail Farringdon underground station, in central London, has several types of benefit. These include allowing optimum use of available ground investigation data, including third party data, with confidence. The model provides an understanding of the local geological structure that had not been possible using other commonly used methods: in particular, it shows the likely distribution of numerous water-bearing coarse deposits and their faulted offsets, which has potentially significant effects on groundwater control. The model can help to focus ground investigation, constrain design and control risk. © 2012 Geological Society of London.


Wan M.S.P.,Crossrail Ltd | Wan M.S.P.,Imperial College London | Standing J.R.,Imperial College London
Proceedings of the Institution of Civil Engineers: Geotechnical Engineering | Year: 2014

Subsurface instrumentation was installed at a field monitoring site in Hyde Park and bordering Bayswater Road for measuring the ground responses to Crossrail tunnelling near Lancaster Gate. Prior to tunnel construction, porewater pressures were measured, both in the ‘greenfield’ ground and the ground in the vicinity of existing London Underground running tunnels, by three multi-level vibrating-wire piezometer boreholes fully backfilled with cement-bentonite grout. The pore-water pressures in the ‘greenfield’ ground were at the same time measured by conventional standpipe piezometers and pushed-in spade cells with built-in vibrating-wire piezometers. This paper investigates the performance of the multi-level vibrating-wire piezometers by comparing their post-installation and steady-state pore-water pressure measurements with those from the other piezometer types. Generally they performed well, providing an efficient means of determining pore-water pressures at several depths within one borehole. One of the ‘greenfield’ multi-level vibrating-wire piezometers indicated underdrainage within the London Clay while the other was influenced by inter-connectivity between individual piezometers within the borehole and also the presence of a claystone horizon. One borehole close to the existing tunnel indicated drainage of groundwater into it; this effect is compared with predictions made using a simplistic finite-difference model. © 2014, Thomas Telford Services Ltd. All rights reserved.


Dulake C.,Crossrail Ltd
Geomechanik und Tunnelbau | Year: 2011

Crossrail is a new railway currently being constructed in London and is the largest construction project in Europe. Linking existing surface railways to the east and west of the capital via 21 km of new twin bore tunnels it will run 118 km from end to end. This paper briefly summarises the benefits of the scheme and its sustainability strategy and goes on to describe the design of the sprayed concrete and bored tunnels, management and mitigation of ground movements. It finishes by outlining the contractual framework for the procurement of the main construction contracts. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co.


Wan M.S.P.,Crossrail Ltd | Wan M.S.P.,Imperial College London | Standing J.R.,Imperial College London
Proceedings of the Institution of Civil Engineers: Geotechnical Engineering | Year: 2014

Imperial College in London, UK, as part of an Engineering and Physical Sciences Research Council (EPSRC) funded research project and in collaboration with Crossrail urban railway project, is performing field monitoring research to investigate how tunnelling affects existing tunnels. Comprehensive instrumentation was installed in Hyde Park and bordering Bayswater Road, beneath which the new Crossrail tunnels were constructed in London Clay below the existing London Underground Central Line tunnels. Surface and subsurface instruments were installed around the Crossrail tunnel alignments to monitor the ground response to the tunnel construction. Monitoring systems of sufficient resolution and accuracy were adopted to achieve high-quality data for assessing the tunnelling-induced ground response and mechanisms of movement from earth-pressure-balance machine tunnelling. The installation of surface and subsurface instrumentation took place in the summer of 2011. This paper describes and discusses the installation of rod extensometers, in-place inclinometers and multi-level vibrating-wire borehole piezometers. Selection of the appropriate cement-bentonite grout mixes for backfilling these borehole instruments is discussed, as this is critical for representative measurements of ground response. Some practical challenges arising during the installation process and how they were overcome are also described. Confidence in the instrument performance is demonstrated using example monitoring results from the piezometer and extensometer installations. © ICE Publishing: All rights reserved.


Douglas A.,Mott MacDonald Ltd. | Smith M.,Bam Nutall Kier joint venture | Hunter J.,Crossrail Ltd
Proceedings of the Institution of Civil Engineers: Civil Engineering | Year: 2015

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. © The authors and the Institution of Civil Engineers. 2015.


Morgan T.,Cross rail Ltd.
Proceedings of Institution of Civil Engineers: Management, Procurement and Law | Year: 2011

With a positive outcome from the UK government's 2010 comprehensive spending review, the Cross rail cross-London railway project has started awarding its main construction contracts. The author explains how risk management has already benefited the project and why its adoption by the supply chain is critical.


Hinde P.,Crossrail Ltd.
IET Seminar Digest | Year: 2010

Summary form only given. A career that has been spent largely in rail operations and maintenance, and in project managing the introduction of new trains, gives a slightly different perspective to the technical themes that have been covered during this course.

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