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Air pressure

Preparations for the 2000 Olympic Games in Sydney include the construction of a 10km long single bore rail tunnel between Kingsford International Airport in Botany Bay and Sydney.

The tunnel is being excavated under sensitive urban conditions in mixed ground conditions using a 10m diameter Herrenknecht earth pressure balancing machine. Kinhill, the Asia Pacific subsidiary of Brown & Root, is managing the project, which is part of the airport expansion programme.

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