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Trenches and shafts - backfill and surface

 

Location​

Freeways and arterial roads​

Other roads pavements​

Footpath, other paved areas, adjacent to structures​

Nature strips, lawns, road reserve clear of pavement​

​ Elsewhere​

Surface course​

Temporary repair - 7 mm cold asphalt, permanent repair - as specified by controlling authority for pavement​

Material type to match original​

Restore to the requirements of the local municipal council. Topsoil and seed grassed areas​

​ Restore to the requirements of the local municipal council. Topsoil and seed grassed areas​

Backfill

Method designation

A1 - 1​

A1 - 1​

A2 - 1

A5 - 2 

 B1 - 2​

B2 - 2​

B3 - 2​

Upper (from 600 mm below surface course)

20 mm VicRoads class 2 crushed rock

Compacted to >98% MDD

20 mm VicRoads class 2 crushed rock

Compacted to >98% MDD

20 mm VicRoads class 3 crushed rock or A Grade sand

Compacted to > 98%

Selected excavated material

Compacted to >95% MDD

Ordinary excavated material

Compacted to > 95% MDD

Bulk excavated material

Compacted to > 95% MDD

Method designation

A1 - 1​

A3 - 1 or A5 - 2​

A2 - 1 or A5 - 2​

B1 - 2​

B2 - 2​

B3 - 2​

Lower (from 300 mm above pipe to 600 mm below surface)

20 mm VicRoads class 2 crushed rock

Compacted to >98% MDD

20 mm VicRoads class 2 crushed rock

Compacted to >98% MDD

20 mm VicRoads class 3 crushed rock or A Grade sand

Compacted to >98% MDD

Ordinary excavated material

Compacted to > 95% MDD

Ordinary excavated material

Compacted to > 95% MDD

Bulk excavated material

Compacted to > 95% MDD

 

 

 

Last updated:
23 August 2017