Geoguide 1 (Hong Kong)

Crushed rock fill (Hong Kong)

Geoguide 1, Table 8 — 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	21.0 kN/m³	133.7 pcf	γ 18–21 kN/m³
γsat	22.9 kN/m³	145.8 pcf	—γsat derived (Gs 2.65), not given by the source.
c′	0.0 kPa	0.0 psf	—
φ′	45.0°	45.0°	φ′ 45 to >50°

γ 18–21 kN/m³ (bulk), φ′ 45 to >50°, c′ 0 kPa (Table 8).
γsat = γd·(1 − 1/Gs) + γw = 21·(1 − 1/2.65) + 9.81 = 22.9 kN/m³, γd at the top of Table 8's 18–21 kN/m³ (Slope's choice).

For use in the absence of reliable test results (Geoguide 1 section 5.3).
For general guidance only, at the stress levels of retaining-wall design, and usable in preliminary design (Geoguide 1 Table 8 note 1; section 5.3).
The preset's unit weights are the top of Geoguide 1 Table 8's range, a default to check against the case: which bound is unfavourable depends on the loading and groundwater (Slope's choice).
Applies only to backfill within Geoguide 1 Table 4 grading and plasticity limits, compacted to at least 95 % of maximum dry density (Table 8 note 4).
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).