Earthwork, Excavation & Soil Swell Calculator
Calculate bank cubic volume (trenches, pits, basements), actual loose swelled volume after digging, dump truck loads, and haulage tonnage.
Standard loose earth: ~1.6 t/m³ (ranging from 1.4 to 1.9 t/m³ depending on wetness)
Expanded volume requiring hauling, bin storage, or disposal
10 m³ utiles / camion
Masse estimée (~1.6 t/m³)
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Understanding Soil Bulking (Swell) and Earthwork Calculation
When excavating earth for foundations, swimming pools, or drainage trenches, virgin in-situ soil immediately experiences mechanical decompression upon disturbance: this is the soil swell phenomenon.
Bank Volume vs. Loose Volume vs. Compacted Volume
Initial swell refers to the percentage volumetric expansion between solid in-ground earth (bank cubic meters) and excavated loose soil (loose cubic meters). Failure to calculate bulking leads to severe truck shortage and budget overruns on transport.
Soil Swell Factors and Bulk Density Reference Table
Données de référence selon les règles professionnelles du terrassement et les normes BTP.
| Soil / Rock Type | Bulking Factor | Volume Expansion | Loose Bulk Density |
|---|---|---|---|
| Sable sec & Gravier meuble | 1.10 - 1.15 | +10 % à +15 % | 1.40 - 1.55 t/m³ |
| Terre végétale légère & Humus | 1.15 - 1.20 | +15 % à +20 % | 1.25 - 1.40 t/m³ |
| Terre ordinaire & Argile sèche | 1.25 | +25 % | 1.55 - 1.65 t/m³ |
| Argile lourde, Glaise & Marne | 1.30 - 1.35 | +30 % à +35 % | 1.70 - 1.90 t/m³ |
| Roche fragmentée & Gravats BTP | 1.40 - 1.50 | +40 % à +50 % | 1.60 - 1.80 t/m³ |
Frequently Asked Questions about Earthwork and Excavation
What is the difference between bank cubic meters (BCM) and loose cubic meters (LCM)?
Bank volume (BCM) is the solid in-place volume compacted over millennia. Loose volume (LCM) is the expanded soil volume after backhoe digging, with air pockets between clumps.
How to choose the right haul truck size for earth removal?
For confined residential sites, 6x4 tipper trucks (8 m³ / 14-tonne payload) offer superior maneuverability. For bulk infrastructure projects, 8x4 (10-12 m³) or semi-trailers (15-18 m³) dramatically lower per-ton transport cost.
How to accurately measure a sloped drainage trench volume?
Average the beginning and ending trench depths: (Depth Start + Depth End) / 2, multiply by Width and Length, then multiply by the appropriate soil bulking coefficient.
How much does 1 cubic meter of excavated dirt weigh?
Loose dry topsoil weighs around 1.3 to 1.4 tonnes per m³, common moist loam weighs ~1.6 t/m³, and saturated heavy clay can reach 1.8 to 2.0 t/m³. Our calculator defaults to 1.6 t/m³.
About the Earthwork & Excavation Calculator & Soil Swell Guide
Automated calculation optimization & decision support
Automated optimization: Smart financial flow and real-cost simulation, dynamic forward-looking amortization schedules and net yield models, with continuous alignment to benchmark thresholds (real-time gold/silver Nisab rates and FX feeds).
Moroccan Dirham (MAD), Euro (EUR), US Dollar (USD) & official benchmarks
Comprehensive support for flagship currencies and benchmarks: Moroccan Dirham (MAD), Euro (EUR), and US Dollar (USD). For Zakat al-Maal, the Nisab threshold is dynamically assessed using official gold (85g) and silver (595g) benchmark values in local currencies. For lunar date calculations, algorithms include moon-sighting calibrations across North Africa and the Middle East.