The direct shear strength and dilatancyof sand–gravel mixtures
Shear Strength Characistic of Sand
2
progressively overcome, the stress decreases with increasing strain. The reduction in the degree of inte rlockin g produc es an increase in the volume of the specimen du ri ng shea ri ng as ch aracte ri ze d by th e re lati on sh ip, sh own in Fi gure 4. 8( c) , between volumetric strain and shear strain in the direct shear test. In the drained Dense Dense Dense Loose Loose Loose Same σ′ Same e 0 φ cv σ′ Different σ′ φ max φ cv e cv (φ max ) (φ cv ) (φ µ ) σ′ (a) (b) (secant) (c) (e) (g) (d) V o l u m e i n c r e a s e V o l u m e d e c r e a s e dε v ε v dγ τ τ τ/σ′ τ γ γ γ γ γ e e e 0 (f ) A B C A B C A B C ′ ′ ′ ′ ′ ′ Figure 4.8 Shear strength characteristics of sand. Shear strength of sands 103
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Transcript of Shear Strength Characistic of Sand
7/23/2019 Shear Strength Characistic of Sand
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progressively overcome, the stress decreases with increasing strain. The reduction in
the degree of interlocking produces an increase in the volume of the specimen
during shearing as characterized by the relationship, shown in Figure 4.8(c),
between volumetric strain and shear strain in the direct shear test. In the drained
Dense
Dense
Dense
Loose
Loose
Loose
Same σ′
Same e0
φcv σ′
Different σ′
φmax
φcv
ecv
(φmax)
(φcv)
(φµ)
σ′(a) (b)
(secant)
(c)
(e)
(g)
(d)
V o l u m
e
i n c r e a
s e
V o l u m e
d e c r e a s e
dεvεv
dγ
τ
τ
τ/σ′
τ
γ
γ
γ γ
γ
e
e
e0
(f )
A
B
C
A
B
C
A
B
C
′
′′
′
′
′
Figure 4.8 Shear strength characteristics of sand.
Shear strength of sands 103
