Geotechnical Engineering

DHARM 580 GEOTECHNICAL ENGINEERING wherein x represents the perimeter-area ratio, P/A. Housel assumes that σ and m are con- stan ...

DHARM BEARING CAPACITY 581 Thus, the net ultimate bearing capacity depends upon (i) the unit weight of soil, γ, and (ii) the ang ...

DHARM 582 GEOTECHNICAL ENGINEERING 140 120 100 80 60 40 (^0) 28 30 32 34 36 38 40 42 44 46 Angle of internal friction,f Bearing ...

DHARM BEARING CAPACITY 583 1100 1000 900 800 700 600 500 400 300 200 100 01 23 4 56 Width of footing, m Allowable bearing pressu ...

DHARM 584 GEOTECHNICAL ENGINEERING Teng (1969) has proposed the following equation for the graphical relationship of Terzaghi an ...

DHARM BEARING CAPACITY 585 Rγ and Rq = correction factors for the position of the ground water table, defined in Eqs. 14.102 and ...

DHARM 586 GEOTECHNICAL ENGINEERING and settlement as given by Terzaghi and Peck, by Peck, Hanson and Thornburn, and by Teng. Det ...

DHARM BEARING CAPACITY 587 If Df = 1.5 m, qult = γDf 1 1 2 + − F HG I KJ sin sin φ φ = 18 × 1.5 118 118 2 +° −° F HG I KJ sin si ...

DHARM 588 GEOTECHNICAL ENGINEERING ∴ qult = 1 2 γ b Nγ. Rγ = 1 2 × 19 × 1.5 × 5.0 × 0.5 = 35.6 kN/m^2 The percentage reduction i ...

DHARM BEARING CAPACITY 589 Terzaghi’s factors for φ = 0° are : Nc = 5.7, Nq = 1, and Nγ = 0. qu = 100 kN/m^2 ∴ c = 1 2 qu = 50 k ...

DHARM 590 GEOTECHNICAL ENGINEERING qsafe = qnet ult η + γ Df = 188 3 + 20 × 1 = 83 kN/m 2 If the water table rises to the ground ...

DHARM BEARING CAPACITY 591 Square b = 2.25 m Df = 1 m γ = 17.5 kN/m^3 qult = 1.3 c Nc + 0.4 γb Nγ + γDf Nq = 1.3 c Nc + γDf Nq, ...

DHARM 592 GEOTECHNICAL ENGINEERING ∴ 600 =^410 4 ×πd^2 ∴ d = 4600 410 × m = 1.365 m A diameter of 1.5 m may be adopted in this c ...

DHARM BEARING CAPACITY 593 Skempton’s equation: qnet ult = c. Nc, where Nc = 5 F 102 + HG I KJ . b L (1 + 0.2 Df /b) for Df /b ≤ ...

DHARM 594 GEOTECHNICAL ENGINEERING qsafe = qnet ult η + γDf = 756 1 012 3 18 0 6 FHG + IKJ +× L N M M M M O Q P P P P . b. kN/m ...

DHARM BEARING CAPACITY 595 Inclination factors (Revised): ic = iq =^1 2 − + F HG I KJ H VAccotφ =^1 75 1350 6 20 20 2 − +× × ° F ...

DHARM 596 GEOTECHNICAL ENGINEERING dγ = 1.0 Inclination factors: iq = iγ = 1 for purely vertical loading. (i) G.W.L. at 8 m belo ...

DHARM BEARING CAPACITY 597 Pressure kN/m^250100200300400500600 Settlement mm 1.5 2.0 4.0 7.5 12.5 20.0 40.0 The size of the plat ...

DHARM 598 GEOTECHNICAL ENGINEERING qsafe = 2542 3 , ≈ 847 kN/m^2 (for failure against shear) From settlement consideration, S S ...

DHARM BEARING CAPACITY 599 Example 14.24: A continuous wall footing, 1 m wide, rests on sand, the water table lying at a great d ...