Sprayed Concrete Lining Archives - Crossrail Learning Legacy

Fisher Street Crossover – Construction of the Secondary Lining

The Crossrail route will run for more than 100 km from Reading and Heathrow in the west, through new twin-bore 21 km tunnels under central London, to Shenfield and Abbey Wood in the east. Crossrail has the requirement for crossovers, one of which was provided at Fisher Street – a small site betwee [...]

Crossrail Tunnel Cross Passages – Construction methods and geology

19 cross passages have been constructed between the two Crossrail running tunnels. Information about the geological conditions, the form of construction and the nature of any ground treatment or dewatering at each cross passage is presented here for reference. It will be of interest to designers and [...]

Stepney Green Cavern – Design Concepts and Performance of SCL Lining

Crossrail includes several kilometres of SCL tunnels which were designed by Contract C121, Mott MacDonald supported by Gall Zeidler Consultants. The largest of these SCL tunnels are Stepney Green turnout caverns designed to allow trains from Maidenhead in the west to travel to Shenfield and Woolwich [...]

Design and Construction of Crossrail Stepney Green Sprayed Concrete Lined Caverns

At over 50m long, 17m wide and 14m high the Stepney Green Caverns are the largest caverns ever built using Sprayed Concrete Lining techniques in Central London. This paper describes the design, construction and monitoring of the Primary Sprayed Concrete Lining together with lessons learnt that can b [...]

Design of Sprayed Concrete Linings in Soft Ground─ A Crossrail Perspective

Sprayed concrete lined (SCL) tunnelling has seen rapid development over the last twenty years in the UK. The purpose of this paper is to give an update on the latest design philosophies and methodologies, and to discuss the future development trends for SCL tunnelling in soft ground. The paper wi [...]

Delivering a Safe Integrated SCL Design: The Challenges and Successes of Crossrail Contract C300/C410

The design delivery for the sprayed concrete linings (SCL) for Crossrail contract C300/C410 Western Running Tunnels and Station Caverns has involved a unique set of circumstances. The SCL primary lining was designed to withstand the various temporary conditions and also formed part of the composi [...]

Stabilisation of soil pillar adjacent to Eastern Ticket Hall at Bond Street Crossrail Station

Sprayed concrete lining (SCL) tunnelling alongside the secant pile walls forming the Eastern Ticket Hall (ETH) box at Bond Street station left a narrow pillar of clay, less than 1m wide in places, between the piles and the tunnel lining. Since the tunnelling was to occur after excavation of the box, [...]

Design of Crossrail’s Precast Tunnel Linings for Fire

This paper describes the approach taken to design Crossrail’s precast concrete running tunnel linings for structural stability during a severe fire incident. In recent decades there have been a number of fire incidents in road and rail tunnels which have caused severe damage to the lining struc [...]

Data management, analysis and visualisation on Crossrail Drive X Western Tunnels

Crossrail Drive X Western Tunnels extend from Westbourne Park to Farringdon Station. With the TBM and SCL contracts working under the most expensive real estate in the world, the safeguarding of assets is paramount for safety and stakeholder’s assurance. The management of instrumentation data from [...]

Crossrail Sprayed Concrete Linings

This paper looks at the sprayed concrete lined (SCL) tunnel design by Mott MacDonald for the Crossrail project. The SCL design consists of five new underground stations, shafts and two Crossovers which will be the largest SCL tunnels to be built in London. It also discusses how the design team was s [...]

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