design of bored piles is 2911-part 1sec2

Sheet1DESIGN OF PILES FORCES DETAILS : Max Compressive Load, Pc (kN)1100kNMax Upward Lift, pt (kN)200kNMax lateral Load, Q (kN)55kNCalculation of Depth of FixityDiameter of Pile, D (mm)600mmCross sectional Area of Pile (mm2 )282743.339mm2Moment of Inertia, I (cm4)636172.512cm4Grade of concrete, Fck (N/mm2)30Modulus of Elasticity, E (Kg/cm2)279165.422reinforcement bars Diameter(mm)16R/f grade,Fy (N/mm2)415As per Soil Investigation reportK1(Kg/cm3)0.146Relative Stiffness factor, T(m)2.612L1(m)0Type of PileFixed HeadedL1/T0From Fig. 2 of IS 2911(Pat 1/sec 2)-1979Lf/T2.15Lf(m)5.616From Clause C.2.1 of IS 2911(Par 1/Sec 2)-1979Mf (kN-m)154.45Say160.00Design of piles for bending and compressionFactor of Safety(F.O.S)1.5Factored compression Load, Pcu(kN)1650Pcu/(Fck*D2)0.153Factored compression Load, Mcu(kN-m)240Mcu/(Fck*D3)0.037from chart of SP 16d'/D0.15p/Fck0.01p %0.4P must be atleast 0.4 as per 5.11.1 of IS 2911 part1/sec2 1979Required area of steel (mm2)1131Minimim no. of bars 8Say12provide 12 mm diameter bars.Actual areal of Steel, Asc(mm2)2412Area of Concrete,Ac(mm2)280331.339Capacity of Section(as per 39.3 of IS 456-2000)Puc(kN)4034.633OKChecking for Bending & CompressionTension, Pt (kN)200Factored Tension, Ptu(kN)300Considering the circular pile as square column of equivalent cross sectional areaSide of Square (mm)531.736say 532.000b=D?????Ptu/(Fck*b*D)0.035Mcu/(Fck*b*D^2)0.053From chart of SP 16d'/D0.2p/Fck0.05p %1.5Ast required (mm2)4245.36provide????Ast provided (mm2)4830OK

For pile in TensionAst required (mm2)=Ptu/(0.87*Fy)830.910According to IS 2911 Min no of bas required6say 6provide 6 mm diameter bars.

Sheet220Fixed Headed825025Free Headed104153012500351440164518502060227080