Structural aspects of Cross River Rail mined tunnel design
Learn about the structural aspects of the Cross River Rail (CRR) project in Brisbane, which is delivering 5.9 km of twin railway tunnels and four underground stations.
This session will cover the design aspects of underground tunnels and the challenges during the design and implementation stages.
You will learn about:
Design approaches for CRR tunnel design across a range of challenging conditions (e.g., low rock cover, overhead services and buildings, geological conditions).
Approach to dealing with ground load, which varies over the design life of the structure.
Using the arch shape of the tunnel crown to reduce (or remove) reinforcement requirements and reduce stripping times.
Designs were generally governed by serviceability crack width limits.
Using tension stiffening theory to account for variation in the modulus of the structure in the bar reinforced intersections to allow optimisation of the design.
About the speaker
Associate Geotechnical Engineer, Pells Sullivan Meynink’s
Alexander is an Associate Engineer in Pells Sullivan Meynink’s Brisbane office, where he has worked for the last 10 years. Alexander has worked on the permanent lining detailed design on a number of major Australian tunnelling projects including Westconnex M4East, Sydney Metro Victoria Cross Station, Rozelle Interchange in Sydney and Cross River Rail in Brisbane. Alexander has been involved at the tender stage, through the detailed design and into the construction phase. He is a chartered engineer and RPEQ in structural, geotechnical and civil fields and is passionate about using experience from all fields of civil engineering to solve challenging design and construction issues.
