SG222

Preparation & Ground Work - Earthwork

Title

Compliance Level

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General

Mandatory

As per current NATSPEC except as follows:

1.8 Geotechnical and Environmental Site Investigation

GUIDE NOTE: Add the following subclause “Report” to the NATSPEC, Building Professional Template/Worksection.

Report
A site investigation was made and a copy of the entire report is included in the Appendix for reference.

Accuracy: The accuracy of the information is not guaranteed and will not be a basis for variation to the contract amount.

GUIDE NOTE: A geotechnical investigation report must be included in the specification

Products

Mandatory

As per current NATSPEC.

Execution

Mandatory

As per current NATSPEC except as follows:

3.2 Geotechnical

GUIDE NOTE: Delete the subclause “As Found Site Conditions” nominated in the NATSPEC Building Template/Worksection and replace with the following:

As found site conditions

General: If the following are encountered, where not identified by the geotechnical report for the site or the documentation, give notice immediately and obtain instructions before carrying out any further work in the affected area:

Bad ground
Discrepancies
Rock
Springs, seepages
Topsoil > 100mm deep

3.4 Removal of Topsoil

GUIDE NOTE: Delete subclause “Topsoil Stockpiles” nominated in NATSPEC, Building Template/Worksection and include the following:

Topsoil stockpiles
Stockpile site topsoil approved for re-use, and imported topsoil before placing as specified in SG / LANDSCAPE SOILS. Establish stockpiles in directed locations, to heights not exceeding 1.5m. Provide drainage, erosion protection and aeration. Do not remove plant growth occurring during storage unless approved. Do not allow traffic on stockpiles. If to remain for more than four weeks, sow with approved temporary grass

3.14 Placing Fill

GUIDE NOTE: Include the following subclause:

General
Loose fill: Maximum loose layer thickness of 150mm.

3.17 Compaction Requirements for Fill and Subgrade

GUIDE NOTE: Consult structural / civil engineer for the % moisture content requirements.
Include the following subclauses:

Moisture content
Consult structural/civil engineer for the % moisture content requirements.

Settlement of earthworks
Fill, compact and trim all settlements of earthworks which take place during construction. Dig out soft spots or unsound areas and fill with sound material properly compacted to a condition equivalent to the surrounding material.