What it tells the engineer
Boreholes show what is actually in the ground. Standard Penetration Tests (SPT) give N-values for soil strength and density at set intervals, and disturbed and undisturbed samples go to the laboratory for testing.
Boreholes, SPT and sampling
Borehole investigation, Standard Penetration Tests and soil or rock sampling for civil engineering projects.
When it is used
Foundation design for buildings, bridges and infrastructure, slope and retaining-wall design, and any site that needs soil and rock samples or groundwater observations.
How a job runs
- 1
Brief
Your site, the structure and what the design needs to know.
- 2
Plan
Test locations, methods and the reporting you need.
- 3
Fieldwork
Testing, drilling and sampling on site by our field team.
- 4
Report
Logs, plots and test results for your engineer.
Typical outputs
- Borehole logs with soil and rock descriptions
- SPT N-values with depth
- Soil and rock samples for laboratory testing
- Groundwater level observations
Questions
How many boreholes does my site need?
It depends on the site area, the structure and the ground. Your engineer specifies it, or we can propose a layout for discussion.
Can samples be tested in the same programme?
Yes. Samples are tested at NatTest Lab and the results are reported with the borehole logs.
Tests in this family
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Wash Boring (Soil Investigation)
Wash boring advances exploratory boreholes for ground investigation. Sampling and in-situ testing requirement…
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Standard Penetration Test (SPT)
SPT N-values at set intervals in boreholes, for soil strength and density.
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Soil and Rock Sampling
Disturbed and undisturbed samples and rock cores from boreholes, for laboratory testing.
