- --------- --------- -------- -------- ----- ----- ------ --------Pile cap (2 pile group) design by bending theory to BS 8110 Part 1 4.11.1991 - --------- --------- -------- -------- ----- ----- ------ --------Pile spacing from center to center should not exceed 3 times the pile diameter and BS 8110 Part 1 clause 3.11.4 should applied Project : Pilecap :
Mix Development Taman Batu Berendam, Melaka P2-150
Column ultimate axial load = Total Total number number of piles piles = Pile ultimate axial load = 1 Pile cap geometry - --------- -------Pile diamter, d = Pile spacing, s = Outstand, bo = Pile cap length D = Pile cap breadth B = Pile cap depth H = Pile cap weight w = Column length d = Column breadth b = Bottom cover = Side cover =
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580 KN 2 No. 290 kN/pile
150 mm 3.00 x d 150 mm 900 mm mm 450 mm 500 mm 4.9 KN 150 mm 150 mm 100 mm 75 mm mm
X | + ------ ------ -----+ | bo | | ### ### | | ### ### | | | + ------ ------ -----+ |<------- D ------>|
v ---
| X
2 Pile cap material - --------- -------Concrete strength fcu = Steel strength fy =
25 N/mm2 460 N/mm2
3 Reinforcement design - --------- --------- X direction --------- -Pile center to pile cap center distance = Pile center to column face distance = Bar diameter = 11.5 mm Ultimate design moment Mx = Eff. depth dx = K = Lever arm zx =
--^ B
225 mm 150 mm
43.5 kNm 394.3 mm 0.0249 374.5 mm mm
Reinforcement required As req = 293 mm2 No. of bar = 3 No. Bar spacing = 144 mm
Reinforcement provided As prov = 312 mm2 No. of bar = 3 No. Bar spacing = 144 mm Max spacing = 186 mm mm 100As/bd = 0.18
Design of pilecap to BS8110
|:: Y direction --------- -Bar diameter = Eff. depth d =
JPT Sdn Bhd
11.5 mm 382.75 mm
Reinforcement required As req = 585 mm2 No of bar = 6 No. Bar spacing = 148 mm
4 Normal shear - --------- --X direction --------- -Vx = 290.00 vx = 1.63 vc = 0.36 av = 105 Enhanced shear =
