Tunnels Archives - Page 2 of 2 - Crossrail Learning Legacy

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 [...]

Installation of Optical Fibre based Sensors within Sprayed Concrete Lined Tunnels to measure Strain and Temperature

The purpose of this paper is to summarise the practical applications and benefits of optical fibre based sensors over traditional monitoring systems installed within a sprayed concrete lined tunnel. The installation was undertaken as part of the Crossrail project at Bond Street station East ticket [...]

The Design of Thermal Tunnel Energy Segments for Crossrail

In recent years the drive to reduce carbon emissions and reliance on oil and gas has led to the increase in the use of renewable energy heating systems. The ground source heat pump systems are an example of these renewable systems. Recently tunnels have been considered as a way of connecting buildin [...]

Tunnel Energy Segments

Significant heat is generated by underground trains, particularly when braking, stopping at platforms and accelerating away from stations. A complex ventilation system including shaft, fans and under-platform extraction has to be designed to manage the rising temperature in tunnels and stations. T [...]

Crossrail Sprayed Concrete Lining Depressurisation at Stepney Green Caverns

Crossrail includes approximately 10km of Sprayed Concrete Lining (SCL) tunnels. One of the largest of these tunnels is being constructed at Stepney Green, East London to facilitate the construction of a sub-surface junction, allowing Crossrail trains from Maidenhead and the west to travel to Shenfie [...]

Geotechnical Risk Management for Sprayed Concrete Lining Tunnels in Farringdon Crossrail Station

The proposed Crossrail station will comprise two ticket halls, two escalator/concourse tunnels, two platform tunnels, numerous cross passages and ventilation tunnels. All station tunnels are constructed using sprayed concrete lining (SCL) techniques. The geological conditions were the principal c [...]

Back Analysis of Observed Measurements for Optimised SCL Tunnel Design

The Crossrail Farringdon Station is a deep level station with two platform tunnels, 300 metres long at a depth of approximately 30 metres below street level. The running tunnels are primarily TBM bored with the platform tunnels enlarged using sprayed concrete lining (SCL) tunnelling method. The stat [...]

Farringdon Station SCL Design – Reducing risk at the heart of Crossrail

The ground conditions expected at Farringdon Station are amongst the most challenging on Crossrail, exacerbated further by four TBMs (C300 and C305 drives – also known as “X” and “Y” drives respectively) all terminating in reception chambers required to facilitate their extraction. The Spr [...]

Crossrail Western Running Tunnels. Crossing of London Underground: Victoria Line and Bakerloo Line Assets.

The C300 running tunnels are of comprised a 6.2m internal diameter, 7.1m excavated diameter, and are to be driven by Earth Pressure Balance Machines (EPBMs) from West to East commencing at Royal Oak Portal and terminating at Farringdon Station via Paddington, Bond Street and Tottenham Court Road Sta [...]

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