Download - Foundation Studies - Pile Group
-
7/26/2019 Foundation Studies - Pile Group
1/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
PART III: PILE GROP
-
7/26/2019 Foundation Studies - Pile Group
2/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
A. In!r"d#$!%"n
& E'a(p)* "+ P%)* Gr"#p
Keywords:single footings, foundation walls, friction pile, end-bearing pile,
footing
-
7/26/2019 Foundation Studies - Pile Group
3/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& P%)* Gr"#p %n ,)a
Keywords:elevation, plan, perimeter, plan, undrained shear strength
-
7/26/2019 Foundation Studies - Pile Group
4/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
T"p%$ A"$%a!*d %!h P%)*Gr"#p
& E$%*n$ "+ P%)* Gr"#p
& S*!!)*(*n! "+ P%)* Gr"#p
& L"ad %!r%#!%"n A("n P%)* %n P%)*Gr"#p
& *a!%5* S%n 7r%$!%"n
& E8*$! "+ P%)* r%5%n %n P%)* Gr"#p
-
7/26/2019 Foundation Studies - Pile Group
5/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
B. E$%*n$ "+ P%)* Gr"#p
& O9*$!%5*:
Appreciate the difference between single pile and
pile group (model test by Kezdi and Whitaker)nderstand approach to consider effect of pile group
-
7/26/2019 Foundation Studies - Pile Group
6/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& *n%!%"n
= uug
Q
Q )(
!roup efficiency
ltimate capacity of group pile
"otal capacity of single pile
)(ugQ uQ
-
7/26/2019 Foundation Studies - Pile Group
7/55Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& S!r* %n$r*a* *)" p%)* r"#p
Keywords:single pile, pile group, stress distribution
-
7/26/2019 Foundation Studies - Pile Group
8/55Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
7a$!"r A8*$!%n Gr"#p,apa$%!/E$%*n$
Keywords:load, displacement, pile group, Kezdi, diameter, spacing, fine sand
& P%)* r"#p %n and ;("d*) !*!< =*>d%
-
7/26/2019 Foundation Studies - Pile Group
9/55Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& E$%*n$ "+ p%)* r"#p %n and =*>d%
Keywords:efficiency, width, length, model test, fine sand, row, group, pile
spacing
-
7/26/2019 Foundation Studies - Pile Group
10/55Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
#fficiency $%
#fficiency & %
& E$%*n$ "+ p%)* r"#p ;("d*) !*!< ?h%!a*r
Keywords:pile load, applied load, Whitaker, ultimate load of pile group, center
pile, corner pile, model test
-
7/26/2019 Foundation Studies - Pile Group
11/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& E$%*n$ "+ p%)* r"#p %n $)a ;*'p*r%(*n!a)< S"*r
Keywords:pile spacing, efficiency, optimum spacing, 'owers, length, model
test, clay, entonite, calculated, measured
-
7/26/2019 Foundation Studies - Pile Group
12/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& Pr"p"*d *$%*n$ *@#a!%"n
-
7/26/2019 Foundation Studies - Pile Group
13/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& ,apa$%! "+ p%)* r"#p %n $)a
Step 1 *alculate capacity of single pile
Qu=Qp+Qs
Step 2 *alculate ultimate capacity of group pile
(taking into account efficiency of group pile)
Step 3 Assuming that group pile act as a single
block with dimensionLgxBgxL, calculate point
bearing and shaft resistance and of the block as
Qp
=Ag
xqg
=Ag
cu
=(Lg
xBg
)cu
Nc
*,and
Qs=2(LgxBgxL)L
Step 4 *ompare ultimate load from 'tep + and
and the lower value is Qg(u).
-
7/26/2019 Foundation Studies - Pile Group
14/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
E'a(p)* and App)%$a!%"n& E$%*n$ "+ p%)* r"#p
*onsider a group pile .f n1/0, and n2/, the
pile diameter,D/011mm and pile spacing,
d/211mm 3etermine the efficiency of pilegroup
24++)2115011(tan % ==
220124++
60621
0)%()%0(% =
=
-
7/26/2019 Foundation Studies - Pile Group
15/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
& Gr"#p $apa$%! %n $)a
#7ample %%%0
8et n1/0, n2/,D/19mm, d/%++1mm,L/%9m :ile has s;uare cross section and
embedded in a homogenous saturated clay with cu/
-
7/26/2019 Foundation Studies - Pile Group
16/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
S*$!%"n O#!$"(*
& A)* !" *'p)a%n !h* d%8*r*n$* %n *ha5%"r*!**n %n)* p%)* and r"#p p%)*
& A)* !" "#!)%n* +a$!"r a8*$!%n$apa$%!/*$%*n$ "+ r"#p p%)*
& A)* !" $a)$#)a!* *$%*n$ "+ r"#p p%)*
& A)* !" $a)$#)a!* $apa$%! "+ r"#p p%)* %nand
& A)* !" $a)$#)a!* $apa$%! "+ r"#p p%)* %n $)a
-
7/26/2019 Foundation Studies - Pile Group
17/55
Indra S. Harahap VAB2013/EVB 4013 - Jan 2006
R*+*r*n$*
& ,hap!*r 11.24 and 11.2 ;a Pr%n$%p)* "+7"#nda!%"n En%n**r%nan!*5 (*!h"d