BS 8002:2015

Gravel, medium dense, sub-angular, well graded

BS 8002:2015, Figures 1–2, Table 1 — typical valuesRevision 1

Use it in Slope

In a design, add it from Materials → Quick add → Built-in soils. The material keeps this citation, and the PDF report prints its caveats.

Typical values — not a substitute for site investigation.

Values

Value	SI	Imperial	Source range
γ	20.0 kN/m³	127.3 pcf	γ 17–20 kN/m³
γsat	22.0 kN/m³	140.0 pcf	γsat 19–22 kN/m³
c′	0.0 kPa	0.0 psf	—
φ′	36.0°	36.0°	—

φ′cv = 30° + φ′ang 2° (sub-angular) + φ′PSD 4° (CU ≥ 6) = 36° (equation 3, Table 1).
γ 17–20 kN/m³ above and γsat 19–22 kN/m³ below the water table (gravel, medium; Figures 1–2).
c′ = 0 (critical state; Slope's choice).

Peak: φ′pk = φ′cv + φ′dil 3° (density index 50 %) = 39°, for mean effective stress up to 400 kPa (Table 1 note D); the preset carries φ′cv (Slope's choice).

For use in the absence of reliable test results (BS 8002 cl 4.3.1.3.2 and 4.3.1.3.5).
The angle rule (equations 3–4, Table 1) applies to siliceous sands and gravels with a fines content not exceeding 15 %; with 15–25 % fines BS 8002 interpolates and above 25 % treats the soil as fine (cl 4.3.1.3.5–4.3.1.3.11).
The preset's unit weights are the top of the source's range, a default to check against the case: BS 8002 asks for the superior or inferior value by its effect (cl 4.3.1.3.4 / 4.3.1.4.4), and which bound is unfavourable depends on the loading and groundwater.
The preset leaves the AS 4678 soil condition at in situ; for a placed fill set the material's soil condition to match (some AS 4678 modes, such as direct sliding across a layer, are not given for in-situ soil).