Table 2 Material strength properties for...

Table 2

Material strength properties for medium- and high-plasticity clays forming the cut slopes within the NR data set

Soil type	Peak		Fully softened or weathered		Residual
Soil type	φ′: °	c′: kPa	φ′: °	c′: kPa	φ′: °	c′: kPa
London Clay	22–28	23	20	12–16	14–15	0
Oxford Clay	22	0.5	21	<0.1	16–11.5	0
Lias Clays	56	13–40	24	<12	18–17	0
Gault Clay	33–53	47–124	—	—	12–15	0
Atherfield Clay	35	—	24	34	16–13	0
Weald Clay	—	—	24–22	10	16–15	0

Soil type	Peak		Fully softened or weathered		Residual
Soil type	φ′: °	c′: kPa	φ′: °	c′: kPa	φ′: °	c′: kPa
London Clay	22–28	23	20	12–16	14–15	0
Oxford Clay	22	0.5	21	<0.1	16–11.5	0
Lias Clays	56	13–40	24	<12	18–17	0
Gault Clay	33–53	47–124	—	—	12–15	0
Atherfield Clay	35	—	24	34	16–13	0
Weald Clay	—	—	24–22	10	16–15	0

Note: strength properties are shown for soils at the peak, fully softened and residual strength states (James, 1970)

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