Design of Tram Tracks - Public Transport Victoria

TRAM TRACK DESIGNGUIDELINESTrack drains usually have the invert of the pipes at least 400 mm deep withthe pit floor being 100 mm deeper. The frames and covers for track drainsare of standard design while the pit is cast as an integral part of the trackslab.The pits for points drains are provided as part of the points assembly andpipe inverts are also approximately 400 mm deep.The pits containing the motors for automatic points are approximately 700mm deep and these shall be drained from the bottom to ensure that themotors remain as dry as possible.Points drains and track drains normally get sand washed into them andspecial care must be taken to ensure that sand and other rubbish cannot bewashed into the pit containing the road motor box for the automatic points.All drains shall be reconnected to existing drains. If new connections to stormwater drains are needed then full details shall be provided and negotiatedwith the relevant local authority.Refer to Drawing No. TS1305 for general drainage arrangement in concretetrack.Refer to Drawing No. TS1403 for general drainage arrangement in ballasttrack.Refer to Drawing No. TS1401-YT for sub-surface drainage requirements inconcrete track.Drainage design shall cater for 1 in 100 year flood.5.5 Sub-Surface DrainsPavement drains are generally provided along the line between an existingpavement and a new pavement (ie track slab) where pavement depths orpermiabilities could create a moisture trap.Special reference is to be made to VicRoads Design Guidelines Section 7.51997.Sub-surface drainage shall be wrapped in geotextile to prevent siltation.Drawing TS1403 shows a typical ballast track cross section with sub-surfacedrainage.Drawing TS1401-YT shows a typical concrete track cross section with subsurfacedrainage.SINCLAIR KNIGHT MERZ SF99137: TRMTRKDESNV1.4.DOC 11