pile cap design.pdf
DESCRIPTION
It can be used to determine two pile cap designTRANSCRIPT
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Sanken Project-
CONSTRUCTION (PVT) LTD Section- 2X300 ᶲ Pilesky's the limit Calc. by Date Chk'd by Date App'd by Date
Pile Design -BS8110(1985) Umesh 4/23/2013 PP
2 Pile Group
Input Data :Pile Diameter (φ) 500 mmLength (L) 2250 mmil i ( )
Toyota Wattala Service CenterJob Ref.
Retaining Wall Sheet no./rev.
φ/5
Pile Spacing (S) 1250 mmWidth (b) 1000 mmDepth (d) 700 mme 250 mmMain Bar Dia. 25 mmCover 40 mmWorking Load (Axial) 1667 kNFac. Load (1.5XAxial) 2500.5 kNFcu 25 N/mm2 S=2.5ᶲColumn Width‐X 450 mm L=S+ᶲ+2e
av
Check for Truss AnalogyEffe. Depth (d) = 647.5 mmTruss Analogy Can be Used
Bottom R/FReynolds HB/pg. 324 T = Ns/4d = 1207 kN
As=T/0.87*460 = 3016 mm2
Reference Calculations Output
Graded Example in RF Concrete Design‐
W.P.S.DiasTruss Analogy Can be Used
As=T/0.87 460 = 3016 mm2BS 8110/Table 3.27 As min (.13)= 910 mm2 7T25 for B1
As req = 3016 mm2As Pro = 3437 mm2# of Main bars = 7Hence Provide 7T25 for B1
Anchorage CheckBS 8110/Table 3.29 Anchorage = 40 d
Anchorage Length = 877 mmStress in R/F = 351 N/mm2S ess / 35 /Stress at Start of bend= 251 N/mm2
BS 8110/Equation 50 ab1 = 81 mmab2 = 144 mmab critical = 81 mmBend Radius (r) >= 159.5 mmUse Radius 160 mmLength (Edge‐Pile Center)= 284 mm
BS 8110/ Cl 3.12.8.23 Eff. Anchorage Bond 300 mmVertical Length 348 mm
Anchorage OK
Total Anchorage Ava. 932 mmAnchorage OK
Check for Punching ShearLoaded perimeter = 1800 mm
BS 8110/ Cl 3.11.4.5 V max = 2.15 N/mm2.8*(fcu)^.5 4.00 N/mm2V allow = 4.00 N/mm2Punching shear OK S<3d,No Further Check Required
Ch k V ti l Li Sh
Punching shear OK
Check Vertical Line ShearBS 8110/ Cl 3.11.4.4 av=(S/2)‐(x/2)‐((ᶲ/2)‐(ᶲ/5)= 250 mmBS 8110/ Cl 3.11.4.3 V (at critical) = Fac. Load/2= 1250.25 kN
v =V/bd = 1.93 N/mm2100As/bd = 0.53400/d = 1.001/rm = 0.8(fcu/25) = 1
BS 8110/ Table 3.29 Vc = 0.51 N/mm22d/av = 5.18Enhanced Vc = 2 65 N/mm2
Shear OK‐R/F Not required
Enhanced Vc = 2.65 N/mm2Shear OK‐R/F Not required
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Top R/FDepth Consider = 250 mm100As/bd = 0.13As req = 325 mm2As pro = 565 mm2 5T12 for T1Hence Provide 5T12 for T1
i ib i l
Reference Calculations Output
Distribution SteelBS 8110/ Table 3.27 100As/bd = 0.13
As = 910 mm2/m T16 @ 200As Pro = 1005 mm2/m B2Hence Provide T16 @ 200
Horizantal BindersUse 25% main SteelAs = 754 mm2As Prov = 804 mm2 4 T 16Bar φ = 16Bar φ = 16Hence Provide 4 T 16
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