7/18/2019 Drop Hammer (Janbu's Equation)

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Perhitungan daya dukung untuk Drop Hammer.

Kebutuhan daya dukung pile (Janbu's Equation) 

Pu = 10 ton per pile

Pipe support OD : 6⅝”

Wall thickness : 0.275” 

Perhitungan a!a ukung satu ponasi tiang pancang "pile# tanpa $enggunakanpara$eter kekuatan tanah engan ru$us %an&u :

i$ana :

'u  = ulti$ate capacit! "l&#

W = (eight o) pile ha$$er "l&#

* = rop o) ha$$er "in#

s = )inal penetration "in#

+ = length o) pile "in#

Wp = (eight o) pile "l&#

 , = net cross sectional area o) ri-en pile "s/in#

= $oulus o) elasticit! o) pile "psi#

steel  = 0 106 psi 

 , = 3.4."D2/2#

  = 3.4."6.6252/6.0752#

  = 5.6 s/in 

= "000 0 0# 8 "5.6 0 106  12#

  = 0.5

 

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Wp  = , + 9s "0.625 pc)#

  = 5.681 0 0.625

  = 77.66 l&

 

;  = 0.75 < 0.15 "77.668000#

  = 0.77

 

ku  = 0.77 1<>1<"0.580.77#?

  = 1.7 

'u  = "000 0# 8 "1.7 1#

  = 6@2 l&

  = 6 kips

 

Aa)et! Bactor !ang igunakan ru$us %an&u =

Cerarti loa $aksi$u$ !ang &isa itahan se&enarn!a :

'u  = 6 kips8

  = 2 kips

  = 11.5 ton 10 ton = OEF

 

Gunakan keala$an $ini$u$ 12 $@ serta Hu$lah &lo(s per )eet untuk )eetterakhir $ini$u$ 12 &lo(s per )eetF

 

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