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Section 2 of the Channel Tunnel Rail Link—now known as High Speed 1—included the construction of a new station for the existing Thameslink rail service under St Pancras International station. This paper describes the construction of the Thameslink box on the route of the existing tunnel along with a direct passenger interchange with the new international station. Two new tunnels were also constructed forming a potential connection to the existing East Coast main-line route. [ABSTRACT FROM AUTHOR]

St Pancras International station is the jewel in the crown of the £5.8 billion Channel Tunnel Rail Link project—now known as High Speed 1. It replaces Waterloo as home for the UK Eurostar service, which now arrives in continental Europe 15 minutes quicker thanks to completion of the final second section of the project. This paper describes its design and construction, which included a painstaking refurbishment and extension of the 140 year old Barlow-designed train shed as well as creation of new state-of-the-art international station facilities. [ABSTRACT FROM AUTHOR]

Section 2 of the Channel Tunnel Rail Link—now known as High Speed 1—emerges from tunnels at the north-east corner of King's Cross lands in London and then sweeps across into St Pancras station at the south west. This paper reports on the major rail network that has been constructed in 'area 100' to enable train services to approach the extended St Pancras station, and also interconnect with other railway networks, thus facilitating high-speed rail services north of London. It describes the engineering objectives and the civil and railway construction works needed to achieve this complex railway network. [ABSTRACT FROM AUTHOR]