VRIOGS 012.2.1 - Public Transport Victoria

8 VRIOGS 012.2.1 REVISION A
g) Cable routes shall, where possible, be on the side of the tracks not occupied by high
voltage earthed locations such as sub-stations, tie stations and transformer
locations.
h) Where possible cable routes shall be located at least 4 metres clear of the base of
any bank or top of any bank or cutting.
i) Cable routes under roadways shall be installed within the railway corridor whenever
possible.
j) Cable routes, pits and markers shall not be placed on access tracks or in positions
where they may obstruct vehicles, or be subject to any form of damage.
k) Alignment for trenching shall be not less than 4 metres from the outside running edge
of the nearest rail and in accordance with the VRIOGS 0001 Structural Gauge
Envelopes - Minimum clearances for Infrastructure adjacent to the Railway, unless
approved by the Infrastructure Manager and clear of any other drainage pits or similar.
l) GPS co-ordinates to an accuracy of ± 0.5 m shall be recorded every ten metres for
the entire length of the cable route / trench, and at all changes of direction. This
method shall also be utilised to capture all;
i. Cable joint locations.
ii.
iii.
iv.
Cable pit locations.
Under line crossings
Under road crossings
v. Other significant points of the cable route
4.6 Cable Route Intersection with Access Roads
a) Where a railway access road intersects with an area where buried cables are being
installed, it shall be in accordance with; and as defined within this Standard.
Generally no special arrangements are required at that location and backfilling shall
be carried out in accordance with this Standard.
b) Where the access road intersects with an above ground troughing route, the cables
shall be run in buried pipes with pits each side of the roadway, in accordance with
this Standard.
c) Where the access road intersects with a GLT route, pipes and pits may be used or
the GLT may be laid 300 mm below ground and be protected with a reinforced
concrete slab backfill with stabilised concrete or stabilised sand, with the
Infrastructure Manager’s approval.
4.7 Types of Cable Route
Cable Route Types are;
a) Type 1 Cable buried directly in the ground (excluding communications cable) –
refer Drawing No. 112000/5/4.
b) Type 2 Cable buried directly in the ground (excluding communications cable)
with one spare conduit buried over the cable to be accessed in future if
required – refer Drawing No. 112000/5/4.
c) Type 3 Cable buried directly in the ground (excluding communications cable)
with one or more conduits buried over the cable and pits at regular
intervals – refer Drawing No. 112000/5/4.
d) Type 4 Cable buried in conduits with pits at regular intervals – refer Drawing No.
112000/5/5.
e) Type 5 Ground Level Troughing (GLT),
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