Geotechnical Engineering

DHARM 640 GEOTECHNICAL ENGINEERING due to stratification or other irregularities are not likely to be significant enough to inva ...

DHARM SHALLOW FOUNDATIONS 641 Excavation to compensate for part or all the weight of the structure may permit the use of raft. T ...

DHARM 642 GEOTECHNICAL ENGINEERING Column No. 123456789 Dead Load (kN) 180 360 240 300 600 360 180 360 210 Max. LL (kN) 180 400 ...

DHARM SHALLOW FOUNDATIONS 643 Conventional approach (Peck, Hanson and Thornburn, 1974): For φ = 36°, Nc= 52 Nq = 35 Nγ = 42 qult ...

DHARM 644 GEOTECHNICAL ENGINEERING c/c of footings (assuming footing B to be centrally placed with respect to column B) = 5.4 – ...

DHARM SHALLOW FOUNDATIONS 645 Column loads: Column A Column B DL 540 kN 690 kN LL 400 kN 810 kN Distance c/c of columns = 5.4 m ...

DHARM 646 GEOTECHNICAL ENGINEERING Allowable soil pressures: 150 kN/m^2 for DL + reduced LL 225 kN/m^2 for DL + LL Column loads ...

DHARM SHALLOW FOUNDATIONS 647 Total area provided = 285 105 2 ..+ × 6.4 = 12.48 m^2 (O.K.) Total DL + LL = 2440 kN Location of c ...

DHARM 648 GEOTECHNICAL ENGINEERING The choice of type of foundation for a given situation may sometimes involve difficult judge ...

DHARM SHALLOW FOUNDATIONS 649 S.B. Sehgal: A Textbook of Soil Mechanics, Metropolitan Book House Pvt. Ltd., Delhi-6, 1967. Sham ...

DHARM 650 GEOTECHNICAL ENGINEERING 15.11 What is the ultimate load which an eccentrically loaded square footing of 2 m size with ...

16 .1 In t roduction Deep foundations are employed when the soil strata immediately beneath the structure are not capable of sup ...

DHARM 652 GEOTECHNICAL ENGINEERING 16.2.1Classification Based on Function or Action Piles may be classified as follows based on ...

DHARM PILE FOUNDATIONS 653 Concrete piles These may be ‘precast’ or ‘cast-in-situ’. Precast piles are reinforced to withstand ha ...

DHARM 654 GEOTECHNICAL ENGINEERING Laterally loaded piles support horizontal or inclined forces such as the foundations of retai ...

DHARM PILE FOUNDATIONS 655 Leads Pile Stay Air compressor or steam generator (a) Crawler-mounted crane rig Leads Hammer (b) Sect ...

DHARM 656 GEOTECHNICAL ENGINEERING The advantage of power hammers is that the blows follow in rapid succession, keeping the pile ...

DHARM PILE FOUNDATIONS 657 both theoretically and by load tests (Bjerrum, 1957). Both theory and experience demonstrate that buc ...

DHARM 658 GEOTECHNICAL ENGINEERING For piles in sands: qb = 1 2 γ bNγ + q. Nq ...(Eq. 16.5) (for square or rectangular piles) qb ...

DHARM PILE FOUNDATIONS 659 300 280 240 200 160 120 80 40 0 Meyerhof Hansen Berezantzev Bearing capacity factor, N /NNg Terzaghi ...