Geotechnical Engineering

DHARM 280 GEOTECHNICAL ENGINEERING If we add these contributions considering both the top and bottom faces and equate to the tor ...

DHARM SHEARING STRENGTH OF SOILS 281 For a saturated soil Cc is very much greater than Cv, and B is very nearly unity; for a dry ...

DHARM 282 GEOTECHNICAL ENGINEERING A for a perfectly elastic material may be shown to be 1/3. This may also be written in the fo ...

DHARM SHEARING STRENGTH OF SOILS 283 the latter. An elementary way to monitor stress changes is by showing the Mohr’s stress cir ...

DHARM 284 GEOTECHNICAL ENGINEERING +t o 4 1 2 3 Loading (s 3 constant) Unloading (s 1 constant) A Loading (s 1 constant) Un load ...

DHARM SHEARING STRENGTH OF SOILS 285 Figure 8.26 shows that stress paths for a consolidated undrained test on a normally consoli ...

DHARM 286 GEOTECHNICAL ENGINEERING and roughness and particle size distribution. Its value increases with density index, with th ...

DHARM SHEARING STRENGTH OF SOILS 287 Shear stress ordeviator stress Dense sand Shear strength due to interlocking Medium dense s ...

DHARM 288 GEOTECHNICAL ENGINEERING critical value will tend to decrease in volume during shearing, while sands with initial void ...

DHARM SHEARING STRENGTH OF SOILS 289 If the sand is moist, the failure envelope does not pass through the origin as shown in Fig ...

DHARM 290 GEOTECHNICAL ENGINEERING s 31 s 32 s 33 s 11 s 12 s (^13) t cu Apparent cohesion Failure envelope (common tangent) fu= ...

DHARM SHEARING STRENGTH OF SOILS 291 8.12.2 Shearing Strength of Clays Shear behaviour of clays is influenced by the fact whethe ...

DHARM 292 GEOTECHNICAL ENGINEERING Since drainage is not permitted both during the application of cell pressure and during the a ...

DHARM SHEARING STRENGTH OF SOILS 293 It is observed that the shear strength is proportional to the normal pressure. The strength ...

DHARM 294 GEOTECHNICAL ENGINEERING t Shearing strength Normal pressure Effective stress envelopeTotal stress envelope Total stre ...

DHARM SHEARING STRENGTH OF SOILS 295 The effect of preconsolidation is to reduce the value of A-parameter and thus cause higher ...

DHARM 296 GEOTECHNICAL ENGINEERING Normal pressure or deviator stress s Strain Î (a) Pore water pressure Strain Î u (b) + Fi ...

DHARM SHEARING STRENGTH OF SOILS 297 is often observed. This is an important phenomenon which is quantitatively characterised by ...

DHARM 298 GEOTECHNICAL ENGINEERING tan φ = τ/σ = 4/10 = 0.4 φ = 21 ° 48 ′ θ = 45° + φ/2 = 45° + 21 48 2 ° ′ = 55 ° 54 ′. Graphic ...

DHARM SHEARING STRENGTH OF SOILS 299 Similarly the other normal stresses and shear stresses are obtained by dividing by the area ...