Kingscote Streets Upgrades - Kangaroo Island Council

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3 Site Preparation and Earthworks This section of the specification details the requirements for Earthworks, including selection of materials, clearing, grubbing, stripping topsoil, excavation and filling. This section shall be read in conjunction with the design details and drawings. 3.1 General This specification shall be read in conjunction with the following Standards and references, which are deemed to form a part of this specification. AS 3798 AS 1289 AS 1141 DTEI Master Specification Guidelines on Earthworks for Commercial and Residential Developments Methods of Testing Soils for Engineering Purposes Sampling and Testing of Aggregates Part 210 – Earthworks 3.2 Materials – Site Preparation and Earthworks 3.2.1 General Site Preparation and earthworks materials are to be as specified herein or as otherwise approved by the Superintendent. 3.2.2 Suitable Materials Suitable materials shall be any clean soil or soil-aggregate mixtures capable of being compacted to form a homogeneous mass and suitable for the construction of structural fill. Large particles must be broke down to a maximum particle size of 100 mm maximum. Classified Fill shall be clean sand or soil free from expansive clays, debris, weeds, roots, organic material or other foreign matter. Classified Fill shall meet the following requirements: Table 3.1 Fill Material Classification Characteristic Aggregate Grading – % passing sieve size Type A Material Classification Type B General Fill (Unclassified) 106 mm – 100 100 75 mm 100 80–100 – 37.5 mm 80–100 80–00 – 0.075 mm 0–25 0–35
• Material, which, after compaction, contains large particles, which may lead to difficulties in the excavation of trenches for footings or services etc. • Single-sized or gap-graded gravels or rock fill that will not break down on compaction, leaving voids into which finer material may subsequently migrate. • Saline, chemically aggressive or polluted soils, and carbonate soils where acid disposal may occur. • Potential acid sulphate soils. • Materials that cannot be tested to demonstrate compliance with the specification 3.2.3 Imported Fill Materials Material that is to be imported to the site and is not a quarry product, shall be assessed and recommended as being suitable for use on the site by an approved Environmental Consultant in accordance with the National Environmental Protection (Assessment of Site Contamination) Measure, and the recommendation must be supported by the Superintendent. No fill material may be brought into site without written approval from the Superintendent and appropriate accompanied documentation. Material imported on site that does not meet the requirement of the National Environmental Protection (Assessment of Site Contamination) Measure shall be removed from site at the cost of the Contractor. 3.2.4 Unsuitable materials Unsuitable materials shall be site won materials unable to be compacted to for the construction of structural fill including: • organic soil (topsoil) • fill contaminated through past site usage which contain toxic substances or soluble compounds • fill containing deleterious materials including, metal, wood, plastic, rubbish, vegetation • other materials deemed unsuitable by the Superintendent. 3.2.5 Backfilling Sand Backfilling sand shall be Type D Sand in accordance with DTEI Specification Sa-D. 3.2.6 Garden Loam Garden Loam shall be an approved sand-loam blend in which all material passes a 2.36 mm sieve. The material shall be free from weeds, roots, clay lumps and other foreign material, and shall be suitable for growing lawns and plants. The total salt content shall not exceed 0.2% by dry weight and the linear shrinkage shall not exceed 10%. 3.3 Construction and Workmanship – Site Preparation and Earthworks 3.3.1 Geotechnical Inspection and Testing Authority (GITA) The Contractor shall engage a suitably qualified independent Geotechnical Inspection and Testing Authority (GITA) to undertake inspections and testing as required in accordance with AS 3798 – Guidelines on Earthworks for Commercial and Residential Developments. 3.3.2 Site Clearance The site shall be cleared only in those parts on which the specified construction works are to be carried out, or as otherwise shown on the drawings. All materials resulting from the site preparation shall be removed from the site and disposed of by the Contractor at his expense. Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 4
Page 1 and 2: Kingscote Streets Upgrades Technica
Page 3 and 4: Table of Contents 1 General Provisi
Page 5 and 6: 5.2.2 Quality Testing 23 5.2.3 Tole
Page 7 and 8: Table 4.2 Compaction requirements f
Page 9 and 10: Table Error! No text of specified s
Page 11 and 12: The Contractor shall be responsible
Page 13: • Lateral supports - provide late
Page 17 and 18: All areas disturbed by the excavati
Page 19 and 20: 3.3.8.2 Placing Fill The method of
Page 21 and 22: 3.4.2 Materials Suitable materials
Page 23 and 24: 3.4.5 Tolerances Construction Toler
Page 25 and 26: 4.2.4 Concrete Concrete grade for d
Page 27 and 28: 4.3.8 Pipe Surround Bedding materia
Page 29 and 30: No pumping will be permitted during
Page 31 and 32: All concrete work shall be in accor
Page 33 and 34: 5 Pavement Subgrade This section of
Page 35 and 36: 5.2.4 Acceptance Criteria Areas whe
Page 37 and 38: 6.3.3 Compaction of Granular Paveme
Page 39 and 40: The following test procedures shall
Page 41 and 42: 7 Spray Seals This section of the s
Page 43 and 44: • retains aggregate after applica
Page 45 and 46: The application temperatures for pr
Page 47 and 48: 7.5 Quality Requirements - Spray Se
Page 49 and 50: 8 Kerbing This section of the speci
Page 51 and 52: Wherever the work of placing concre
Page 53 and 54: 9 Verges, Footpaths and Driveways T
Page 55: Footpaths and driveways Absolute ±

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