EES Inquiry Melbourne Metro Rail Project Presentation by Dr Russell Keays Keays Engineering
Basic Assumption • The major Environmental Benefit from constructing more public transport infrastructure is to encourage the travelling public to abandon their cars and take public transport. – The maximum long-term benefit is achieved by locating the infrastructure where people want to go. – The short-term benefit comes from designing the works to minimise disruption to existing public transport.
Where do people want to travel?
In the City Queen Street and Russell Street are central to the business district. Swanston Street is for shoppers, theatre-goers – off-peak users.
Advantages of separate network Can use of autonomous (driver-less) trains. – Requires fewer staff to operate trains. – Allows smaller separation times, greater frequencies. – Rapid turn-around at terminus.
Advantages of separate network Third-Rail Electrification and Smaller Tunnels
Construction Methodology • Shallow Tunnels – Avoids penetrating below groundwater levels wherever practical. – Minimises groundwater seepage. – Easier and cheaper to construct.
Top-Down Construction • Not “Cut and Cover” but “Cover and Cut” • Pre-cast roof panels for rapid construction • Deliver the majority of Spoil down-tunnel, not through suburban streets. • Minimise disturbance to local communities. • Travel time from Platform to Street reduced (with stations at 35m below ground, each passenger looses about 3 minutes per day)
End of Presentation • Refer to written submission for more details.
Other illustrations from Submission
~ ~ V O LUME 12 .5m 3 /m STAGE 1 STAGE 2 STAGE3 BORE PIERS REMOVE TOP SURFACE EXCAVATE TO OEPlH BACK.fill OVER TOPS INSTALL PRECAST PLACE 811\JtEN COVER • • • - - - - STAGE 4 STAGE5 STAGE6 PLACE FLO OR SLAB SHOT C RETE WALLS PLACE RAILS INSTALL SER\11'.;ES
~ ~ ~ ~ ~ ~ 24200 3500 3500 5100 // - w 9 9 9 9 9 8800 SECTION ON TWIN TRACKS UNDER URBAN COLLECTOR ROAD (4 LANES@ 3. 5m WIDTH )
~ ~ ~ "" // (/) O'. o w <D (/) 0- ('")(}'. . . . 11 11 . . . I I - SECTION ON STATION UNDER URBAN COLLECTOR ROAD STAIRWAY TO STREET IN MIDDLE ROADWAY REDUCED TO SINGLE LANE AT STATION
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