The Key Role of Monitoring in Controlling the Construction of the New Jubilee Line between Waterloo and Westminster, London

摘要

Crucial to the success of Contract 102 of the Jubilee Line Extension Project (JLEP) was the detailed analysis of the impact of the construction process on the surrounding ground, structures and tunnels under construction. The construction works were to pass under or alongisde some of London's most historic and prestigious buildings, consequently stringent limits were imposed upon ground and structure movements. To control these movements and remain within the limits set, a comprehensive monitoring system was required, comprising a wide variety of instruments linked to a geotechnical database. An extensive and integrated instrumentation system was designed to produce quality data and as no monitoring system existed that covered the unique requirements of the contract and of the Balfour Beatty Amec Joint Venture (BBA), the option was taken by BBA to design and develop a system in house.