Victoria Station Upgrade

London Underground

Engineering and Design Services for Ground Improvement, Building Protection and Tunnel Construction:

Extreme passenger congestion in two interconnected London Underground stations, the Victoria Line and Circle/District Line Stations (both underground), necessitated an extensive upgrade program.

Gall Zeidler Consultants provided engineering and design services for the ground improvement, building protection, and construction of passenger connection tunnels, tunnel junctions, and ventilation and egress shaft for this project. Mined tunneling will primarily use sequential methods and sprayed concrete linings (SCL), also known as NATM. Various methods including jet grouting and ground freezing are being considered for ground improvement. Two new escalator tunnels to be constructed by SCL / NATM methods, and two ticket halls to be constructed using cut-and-cover methods are also part of the project. All structural elements are to be built under confined space conditions and at shallow depths. Tunneling using SCL / NATM will occur mainly in the sandy gravel and London Clay strata.

LOCATION:

London, United Kingdom

DATE:

2007-Present

STRUCTURE:

Passenger Tunnels

Length:

Approximately 1,000 feet (300 meters)

CROSS-SECTION:

350-555 square feet (33-50 square meters)

GEOLOGY:

Man-placed fill, alluvium (peat, silt, and clay), sandy gravel and sand, London Clay. Groundwater table approximately 20-28 feet (6-8 meters) below the surface

Cost:

Approximately $ 800 millions

CLIENT:

Mott MacDonald, Ltd.

Owner:

London Underground Limited