Pile Design and Construction Practice, Fifth edition

Very loose 0 10 20 30 40 50 60 70 Standard penetration resistance N, blows/300 mm Angle of shearing resistance f, degrees 28 30 ...

corrected for overburden pressure when relating them to the Berezantsev or Brinch Hansen Nqfactors. The base resistance of open- ...

The penetration depths in Figure 4.14 have been limited to 20 m for dense sands. This is because the pile capacity as determined ...

Resistance of piles to compressive loads 169 Ultimate base resistance of closed-end pile (MN) Kulhawy/Vesic N q*N g*values Loose ...

170 Resistance of piles to compressive loads Relative density Ko Loose 0.5 Medium-dense 0.45 Dense 0.35 Equation 4.6 applies to ...

using standard penetration tests or static cone tests. Normally consolidated soils show low penetration values at the surface in ...

H-section piles are not economical for carrying high compression loading when driven into sands. Plugging of the sand does not o ...

The partial factor in Table 4.2 is applied to obtain , and Nqis derived from using the relationship with SPT or CPT tests. The m ...

the arching capacity is related principally to the pile diameter. Clearly it is not related to the soil density because the soil ...

4.3.5 Bored and cast-in-place piles in coarse-grained soils If drilling for the piles is undertaken by baler (see Section 3.3.7) ...

very sensitive to the values of the angle of shearing resistance of the soils. These values are obtained from in-situ tests made ...

Resistance of piles to compressive loads 177 Table 4.12Relationships between pile shaft friction and cone resistance (after Meig ...

The method generally used in the Netherlands is to take the average cone resistance over a depth of up to four pile diameters be ...

Safety factors generally used in the Netherlands in conjunction with the ‘ 4 D – 8D’ method to obtain the allowable pile load ar ...

Small reductions in overburden pressure cause only elastic movements in the assembly of soil particles. Larger reductions cause ...

4.3.7 Tubular steel piles driven to deep penetration into clays and sands The research work undertaken at Imperial College, Lond ...

The ICP method for piles driven into clays is based on effective stresses and takes into account the effects on the interface sh ...

The conditions at the interface can be simulated by determining in a ring shear apparatus where the remoulded clay is sheared ag ...

Jardine et al.(4.30)recommend safety factors of 1.3 to 1.6 for the shaft resistance in compression for offshore foundations wher ...

The shear modulus Gin equation 4.30 can be measured in the field using a pressuremeter (Section 11.1.4) or a seismic cone penetr ...