Re: Brisbane Airport line design

[david <david@nmit.vic.edu.au>]

Should put him onto the various miniature railway gauge clubs - they often make
multi-gauge turnouts that move the frog etc.I suppose some moveable frog with a
stub point would be out of the question ?

Regards,
David Head

John Browning wrote:

> Picked up on another list:
>
> >
> > Dear Members,
> >
> > I was wondering if anybody could offer some help with a design problem we
> > are currently undertaking.
> >
> > Our new airport line consists of 8.5 km of single elevated viaduct track
> > with passing loops. The track will have an internal guard rail along the
> > whole length for derailment protection.
> >
> > QR (Queensland Rail) is building 6 turnouts on top of the viaduct. The
> > viaduct has small side walls which do not give any protection for derailed
> > vehicles.
> >
> > We are currently designing the turnouts with external and internal guard
> > rails and also internal ramps to hopefully guide a derailed vehicle
> through
> > the turnout and keep it upright.
> >
> > Do you know of any place in the world that uses such a design?
> >
> > Also, do you know of any other way of
> > guiding derailed vehicles through turnouts on viaducts without side walls?
> >
> > I certainly would appreciate any comments you might have.
> >
> > Thanks
> >
> > Greg Beh
> > Principal Drafting Coordinator
> > Track Engineering, QR
> > email: gregory.beh@qr.com.au
> >
>
> --
> John Browning
> Rockhampton, Queensland, Australia
> ceo8@rocknet.net.au