Rates, Norms & Durations / Building & Construction / Earthworks & Excavation
Excavation Works
5 entriesSource page: Excavation Works
Subjects on this page
| Activity | Entry (verbatim) | Source |
|---|---|---|
| Excavate & Load | Excavate Spoil Heaps and Load to Transport (m3/hr): Material0.6 m30.8 m31.0 m31.2 m3Sand/Soil20.025.630.335.7Gravel20.425.631.337.0Clay/Chalk18.523.227.833.3Boulder Clay16.921.324.430.3Note:0.6m3, 0.8m3, 1.0m3 and 1.2m3 are excavator bucket capacity.20.0, 25.6, 30.3 and 35.7 etc are excavation rates in m3 / hr | Excavate & Load |
| Ground Excavation | Ground Excavation Rates (m3/hr):Ground TypeBucketBulk WorksBasementsTrenchesSmall & DeepSand/Soil0.3m38.78.07.18.4> 0.4m328.515.425.010.0 0.5m350.020.028.613.3Gravel0.3m37.16.96.14.5 0.4m325.914.322.28.7 0.5m340.018.128.611.1Clay/Chalk0.3m37.16.56.14.1 0.4m325.013.322.28.3 0.5m340.016.728.610.5V.Difficult0.3m36.15.95.44.1 0.4m322.211.820.07.7 0.5m328.611.820.06.7Small or Deep ExcavationsTask / DescriptionSlow Ave Fast Units Hydraulic Excavator, 0.3m3 bucket, Sand/Soil6.7 8.4 9.9 m3/hr Hydraulic Excavator, 0.3m3 bucket, Gravel Beds3.2 4.5 5.0 m3/hr Hydraulic Excavator, 0.3m3 bucket, Clay/Chalk3.3 4.1 5.2 m3/hr Hydraulic Excavator, 0.3m3 bucket, Hard Ground3.3 4.1 5.2 m3/hr Hydraulic Excavator, 0.4m3 bucket, Sand/Soil8.2 10.0 11.7 m3/hr Hydraulic Excavator, 0.4m3 bucket, Gravel Beds7.1 8.7 10.2 m3/hr Hydraulic Excavator, 0.4m3 bucket, Clay/Chalk6.5 8.3 9.4 m3/hr Hydraulic Excavator, 0.4m3 bucket, Hard Ground6.3 7.7 9.1 m3/hr Hydraulic Excavator, 0.5m3 bucket, Sand/Soil12.2 13.3 15.4 m3/hr Hydraulic Excavator, 0.5m3 bucket, Gravel Beds10.2 11.1 12.9 m3/hr Hydraulic Excavator, 0.5m3 bucket, Clay/Chalk9.7 10.5 12.1 m3/hr Hydraulic Excavator, 0.5m3 bucket, Hard Ground6.1 6.7 7.7 m3/hr12 rate statements found; left for an editor | Ground Excavation |
| Material Weights | Wagon sizes and tonnage capacities vary and should be taken into consideration. Rock = 2.5 T/m3 Concrete = 2.4 T/m3 Landfill / CDG = 1.9 T/m3 Sand = 1.8 T/m3 | Material Weights |
| Spoil By Barge | Removal / Transportation Of Spoil By Barge: The size, getting material to the facility, location and movement restrictions of the barge loading facilities are critical to production. A 2,000 m3 flat bottom barge, could easily be loaded 1.5 times per day, with a planned allowance of 2 no movements per day for example... 1,000 m3 barge, filled in 9.5 hrs = 2 movements/day 1,500 m3 barge, filled in 6.5 hrs = 3.5 movements/day | Spoil By Barge |
| Spoil By Conveyor | Removal / Transportation Of Spoil By Conveyor: The size and location of the conveyor are critical to production and should be sized according to the most critical peaks in excavation. There are the following parameters to select... Max excavation per hour 185 m3/hr Assume belt size 600 mm Assume conveyor trough angle 20 degrees From the above you read off specific parameters from the suppliers table... Recommended belt speed 150 m/min Angle of repose for dry sand 35 degrees Angle of surcharge 20 degrees You must then read off, from the manufacturers tables the conveyor capacity... Cross-sectional area of load 0.02979 m2 At a speed of 150 m/min gives 268 m3/hr Assume a bulking factor for excavated sane = 15%, and assume 50 minutes work per hour to allow for blockages and maintenance etc... 268 x 85% x 50/60 = 190 so therefore capacity of conveyor = 190 m3 per hour = OK. Hong Kong Airport Express Station conveyor was capable of 11,500 m3/week.4 rate statements found; left for an editor | Spoil By Conveyor |
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These values were contributed by members and reflect the conditions, methods and regions they worked in. They are a starting point for estimating, not a standard. Check them against your own records, the site conditions and the contract before relying on them.