Geotechnical Engineering

DHARM 660 GEOTECHNICAL ENGINEERING σh = average lateral pressure of soil against the pile surface; and δ = angle of wall frictio ...

DHARM PILE FOUNDATIONS 661 When a pile is driven in soft clay, the soil around gets remoulded and loses some of its strength. Ho ...

DHARM 662 GEOTECHNICAL ENGINEERING ratio of bulb size to the pile shaft size may be 2 to 3; usually a value of 2.5 is used. The ...

DHARM PILE FOUNDATIONS 663 Wave equation method As the top of the pile is struck with the pile hammer, the impact energy of the ...

DHARM 664 GEOTECHNICAL ENGINEERING bearing. If this does not happen, the pile is said to meet ‘refusal’. The shape of the wave d ...

DHARM PILE FOUNDATIONS 665 where s = final penetration (set) per blow. It is taken as average penetration per blow for the last ...

DHARM 666 GEOTECHNICAL ENGINEERING where C =^1 2 (c 1 + c 2 + c 3 ) c 1 = elastic compression of pile c 2 = elastic compression ...

DHARM PILE FOUNDATIONS 667 (ii) Elastic compression of pile cap (c 2 ) Table 16.5 c 2 values Material of pile Driving stress (kN ...

DHARM 668 GEOTECHNICAL ENGINEERING Here, C = C 1 + C 2 + C 3 C 1 = temporary compression of dolly and packing = 1.77 Q A up, whe ...

DHARM PILE FOUNDATIONS 669 Engineering News formula and the Danish formula have gained popularity owing to their simplicity. If ...

DHARM 670 GEOTECHNICAL ENGINEERING Load 30 cm sq timbers 40 cm I-beams Timber crib Hydraulic jack Stakes for fixed reference mar ...

DHARM PILE FOUNDATIONS 671 Another method in use for the slow test is to plot both load and settlement values on logarithmic sca ...

DHARM 672 GEOTECHNICAL ENGINEERING The total settlement S of the pile head at any load may be written as S = Se + Sp ...(Eq. 16. ...

DHARM PILE FOUNDATIONS 673 increasing with further increase in load. Van Wheele found that the point-load component increases li ...

DHARM 674 GEOTECHNICAL ENGINEERING Franki Pile Company has suggested the following: Table 16.8 Correlation between qc and N (Fra ...

DHARM PILE FOUNDATIONS 675 For H-piles, fs = N ...(Eq. 16.38) (kN/m^2 ) According to De Beer, point resistance of bored piles in ...

DHARM 676 GEOTECHNICAL ENGINEERING Negative skin friction may also occur by the lowering of ground water which increases the eff ...

DHARM PILE FOUNDATIONS 677 16 .6 Pile Groups A structure is never founded on a single pile. Piles are ordinarily closely spaced ...

DHARM 678 GEOTECHNICAL ENGINEERING R.C. column Column pedestal Reinforcing steel Pile cap Pile Fig. 16.13 Pile cap for a R.C. co ...

DHARM PILE FOUNDATIONS 679 The stress isobars of a single pile carrying a concentrated load will be somewhat as shown in Fig. 16 ...