VRIOGS 012.2.1 - Public Transport Victoria

34 VRIOGS 012.2.1 REVISION A
b) In continuous rock areas, permission may be given for the depth of ULX and URX to
be reduced. In such cases the conduits shall be placed in a trench chased into the
rock and encased in concrete with a minimum concrete cover of 150 mm.
c) The following inspections shall be carried out by the Constructor:-
i. Three days after the construction of the ULX to determine if there is any
subsidence and remedy where necessary.
ii.
iii.
Three days after any remedial work to determine if the subsidence has been
halted and remedy where necessary.
Two weeks after construction of the ULX if there is subsidence or other defect
and remedy as necessary.
d) In each case, the Infrastructure Manager shall be immediately advised if any
defect is found.
10.4 Under Line Crossings (ULX)
a) Trenched ULX shall be at right angles to the tracks and, in general, be located at
least two sleeper spacings from any rail joints. They shall also be a minimum of 2
metres clear of the movable parts of point and of the V-crossing of any points leads.
b) ULX conduits shall extend not less than 4 metres beyond the outer rail on each side
of the track, except where the Infrastructure Manager’s rail corridor ends within 4
metres, or there is a physical obstruction that precludes this requirement or with the
Infrastructure Manager’s approval.
c) A cable pit (in accordance with the provisions of this Standard) shall be provided at
each end of main cable route ULX conduits.
d) Where an ULX has been made and the sleepers have not been removed, in addition
to the above the following shall apply:
i. The ballast shall be compacted with a wacker packer or similar in layers of
150mm.
ii.
iii.
iv.
Where it is difficult to use the wacker packer or similar under the sleepers, as
minimum, make sure that the ballast is restored under the sleepers and tamp
the ballast under the sleeper with a vibrating tamping head (eg hand-held
tamper).
Compact the area thoroughly between the sleepers.
It may not be possible to compact the ballast shoulders that are outside of the
sleepers.
10.5 Under Road Crossings (URX)
a) When it is necessary to install a cable route under a roadway it shall be planned and
constructed so as to cause the minimum disruption possible to the users of the
roadway.
b) URX conduits shall extend under nature strips and pathways into the Infrastructure
Managers property on each side of the roadway sufficiently to provide a cable pit at
each end of the URX that is wholly within the Infrastructure Manager’s property.
c) Where the URX is wholly within the Infrastructure Manager’s property, the cable pits
shall be at least 2400 mm clear of the roadway edge.
d) Where the Infrastructure Manager’s property is unfenced or where the URX is wholly
within the Infrastructure Manager’s property, rail posts shall be installed on the road
side of the pits to protect them from vehicular traffic.
e) All URX works shall comply to VicRoads Standard Specification for Road works and
Bridge Works
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