Soil Bearing Capacity Calculator
Estimate the allowable soil bearing capacity and soil type from the Standard Penetration Test (SPT) N-value.
How to Use the Soil Bearing Capacity Calculator
- Enter the SPT N-value from your soil investigation report.
- Click Calculate to get the estimated bearing capacity and soil type.
使用例
- •Preliminary foundation design.
- •Site investigation interpretation.
- •Soil classification for earthworks.
- •Geotechnical engineering education.
計算式
q = N × 10 kPa. Soil classification: N<4 Very Loose, N<10 Loose, N<30 Medium Dense, N<50 Dense, N≥50 Very Dense.
よくある質問
What is the SPT N-value?
The Standard Penetration Test N-value is the number of blows required to drive a sampler 300 mm into soil.
Is this formula accurate?
It is an empirical estimate suitable for preliminary design. A geotechnical engineer should confirm values.
What is a typical N-value?
Soft clay: 2–4. Medium sand: 10–30. Dense gravel: >30.