Reference Specifications for Civil Engineering Work 2001


Installation Techniques – New Construction Projects



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1.2Installation Techniques – New Construction Projects


Installation of services as part of new construction projects are to be undertaken prior to constructing pavements, footpaths, bikepaths and the like. Should this not occur, the service shall be installed using trenchless technology methods for all categories of roads.

1.3Installation Techniques – Existing Council Assets


The following options, listed in preference order, are available where it is necessary to place underground services beneath existing assets such as the road pavement:

Trenchless technology methods;

Utilise existing conduits/culverts; or

Trench excavation and reinstatement.



Trenchless technology methods

Where underground services are to be placed beneath all existing District, Suburban, Industrial Access and Arterial Roads and any existing conduits or culverts cannot be used, trenchless technology methods shall be used unless otherwise approved in writing by Council. Trenchless technology methods may also be used to cross all other categories of existing Council roads.

Based on a total life cycle, the cost of trenchless technology methods can often be less than that for trench excavation and reinstatement.

Using existing conduits or culverts

Where services can be installed in existing Council owned conduits or culverts, Council approval must be obtained prior to any installation being undertaken. Generally culverts should not be used for permanent installations as these interfere with water flow.

Culverts should only be used for temporary situations where there is little risk to the road integrity.

Trench excavation and reinstatement

Where services are installed across or along existing assets owned by Brisbane City Council, reinstatement of the trench backfill, pavement and surfacing layers shall be undertaken in accordance with this specification.



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