Tweet Share

• Send by email

  Send by email

  

  Design of Mined Cross Passages for Waterview Project Auckland (NZ): Comparison between Predicted vs Actual Performance

  The Waterview Connection is the NZ Transport Agency’s largest and most challenging road project to date. The world’s 10th largest Earth Pressure Balance Tunnel Boring Machine was used to construct the 2.4 km long twin tunnels of 13.1 m internal diameter. The tunnels are connected by sixteen mined cross passages, with an internal span of 5.2 m and 6.0 m height. This paper describes the lessons that were learnt during the design and construction of these cross passages. The authors present the differences between the design predictions and actual observed behaviour of the tunnel structural openings and ground support systems. This paper also describes some key construction decisions that were made based on the monitoring results to modify the construction sequencing and rationalise the monitoring requirements, which assisted with expediting construction. Based on the lessons learned, recommendations are proposed regarding tunnel instrumentation and the evaluation of monitoring data.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print