Undisturbed soil below footings shall be proof compacted by the Contractor with a plate compactor, and disturbed soil below foundations shall be compacted to a minimum dry density of 96 % to the minimum depth as given on the Drawings and tested in accordance with WA 134.1. When foundations in Perth sands have been excavated, the Contractor shall compact the bearing surface and test the compaction in accordance with Soil strength and consolidation tests Determination of the penetration – resistance of a soil Perth sand penetrometer test, as set out in – AS1289.6.3.3. The minimum acceptable blow count is 10 blows per 300 mm for the whole depth as shown on the Drawings. Testing frequency shall be 1 test per 10m of wall length, or 1 test per wall panel, whichever is the greater frequency. If the soil does not meet the requirements of this Clause, it shall be compacted by the Contractor until it complies, unless otherwise directed by the Superintendent. 904.35 FOUNDATION IMPROVEMENT If directed by the Superintendent, the soil be excavated and either by the Contractor if it meets the requirements of Clause 904.33 or replaced by compacted layers of suitable fill satisfying the requirements of Clause 904.33. The excavation shall be carried out to a depth as directed by the Superintendent. The thickness of each of backfill material shall be limited to enable the specified compaction to be obtained for the full depth of the layer for the equipment being used and in any case shall not exceed 300mm before compaction. The backfilled material be re-tested by the Contractor to ensure compliance with Clause 904.34. 904.36 PROTECTION OF BEARING SURFACES The exposed bearing surface at the bottom of each excavation shall be Protection adequately protected from disturbance by the Contractor's operations or by the action of stormwater or ground water. Any material at the bottom of an excavation which becomes unsuitable shall be removed and replaced with fill complying with Clause 904.33 and compacted in accordance with Clause 904.34 or replaced by additional blinding concrete. Alternatively, the disturbed surface may be lightly watered and compacted with a hand operated mechanical compactor until it complies with Clause 904.34. 904.37 BACKFILLING 904.37.01 GENERAL
Undisturbed soil below footings shall be proof compacted by the Contractor with a plate compactor, and disturbed soil below foundations shall be compacted to a minimum dry density of 96 % to the minimum depth as given on the Drawings and tested in accordance with WA 134.1. When foundations in Perth sands have been excavated, the Contractor shall compact the bearing surface and test the compaction in accordance with Soil strength and consolidation tests – Determination of the penetration resistance of a soil – Perth sand penetrometer test, as set out in AS1289.6.3.3. The minimum acceptable blow count is 10 blows per 300 mm for the whole depth as shown on the Drawings. Testing frequency shall be 1 test per 10m of wall length, or 1 test per wall panel, whichever is the greater frequency. If the soil does not meet the requirements of this Clause, it shall be compacted by the Contractor until it complies, unless otherwise directed by the Superintendent. 904.35 FOUNDATION IMPROVEMENT If directed by the Superintendent, the soil be excavated and either by the Contractor if it meets the requirements of Clause 904.33 or replaced by compacted layers of suitable fill satisfying the requirements of Clause 904.33. The excavation shall be carried out to a depth as directed by the Superintendent. The thickness of each of backfill material shall be limited to enable the specified compaction to be obtained for the full depth of the layer for the equipment being used and in any case shall not exceed 300mm before compaction. The backfilled material be re-tested by the Contractor to ensure compliance with Clause 904.34. 904.36 PROTECTION OF BEARING SURFACES The exposed bearing surface at the bottom of each excavation shall be adequately protected from disturbance by the Contractor's operations or by the action of stormwater or ground water. Protection Any material at the bottom of an excavation which becomes unsuitable shall be removed and replaced with fill complying with Clause 904.33 and compacted in accordance with Clause 904.34 or replaced by additional blinding concrete. Alternatively, the disturbed surface may be lightly watered and compacted with a hand operated mechanical compactor until it complies with Clause 904.34. 904.37 BACKFILLING 904.37.01 GENERAL
Specification%20904%20Noise%20Walls%20%2030%20April%202018.RCN-D18^23362907.DOCX