Category: Structure & materials
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
A soil investigation report gives borehole and lab results that define soil layers, bearing capacity, groundwater level and salt content, with a recommended foundation type.
Why it matters on a project
Foundations cannot be designed properly without it. Expansive, weak or saline soils need very different solutions from ordinary soil.
Measurement and pricing
Priced by number and depth of boreholes and the tests required.
Common mistake
Relying on a neighbouring plot's soil report to save cost.
Frequently asked questions
How many boreholes does a villa need?
The geotechnical consultant decides by area and code; often two or three for a typical villa.
How long is a soil report valid?
It stays valid for the same plot unless conditions change, such as new fill or a rise in groundwater.
Related terms
- Footings (foundations)Structural elements that transfer the building loads to the soil.
- Compaction testA test proving backfill layers are compacted to the required density.
- WaterproofingLayers preventing water ingress into structural elements or spaces, such as bituminous membranes and cementitious coatings.
- Ground beam (tie beam)A ground-level beam tying the footings and carrying walls at ground level.
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