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APPLIED FAST TRACK APPROACH IN TUNNEL DESIGN: LESSONS LEARNT (2012)

When time constraints in tunnel construction cause standard design and construction procedures to be compressed and time sensitive decisions are critical, preceding over other conventional requirements or when tunnel construction commences prior to the completion of all final design documents, then a Fast Track approach in tunnel design is an attractive 
solution to move the construction forward, satisfying the strong need for construction kick-off and enabling discrete design processes to run in parallel. The Fast Track approach is based on clear chain of commands between the Contractor and the Designer. Very few decision making individuals, clearly designated by both parties are authorized, trying to avoid insignificant changes when decisions are made, to keep a well thought out program of requirements and a very close contact. Very strict control and quality assurance of the construction activities is performed, constant interaction with the Client is maintained and effort to avoid design processing delays for minor modifications is kept. The recent application of the Fast Track design approach in several major tunnel construction projects is presented, with special focus on the administrative and managerial problems usually encountered and the main construction achievements gained. The main lessons learnt by Clients, Contractors and Designers are analysed and the key points for optimizing the Fast Track approach in the future are identified.
Reference:
Practices and Trends for Financing and Contracting Tunnels and Underground Works, Athens, March 22nd - 23rd 2012
Organization:
OK CONSULTING SA, ATHENS, GREECE
Athens
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