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Calculation of Carrying Capacity for Bored Piles chainage 2+233
Matara-Kataragama Railroad Extension Project
1000mm Diameter Bored Pile at B-0!"#1"$
Calculation for Skin frictions
diameter of pile 400 safety factor for skin friction 3 reduction factor for bentonite slurry
Poisson ratio 0.3 idth of the pro!ected area of pile
soil and "eathered rock
$ayer Dept% &%'( )P& )'in *riction )'in *riction E
, ased on )P& . , ased on )P& . , ased on )P& . 's#m$ #m$ #k&m2$ #k$ #k&m2$ #k&m3$ #k
0
'ery stiff sandy lateri 0.(0 0.(0 )2 )(.*0 )2.( ,00 2)42,.()4 )42,
'ery stiff sandy lateri ).00 0.(0 )2 )(.*0 )2.( ,00 2)42,.()4 2)42
'ery stiff sandy lateri 2.00 ).00 4 (.20 ,.3 2*00 )42.,()4 23,0
'ery stiff sandy lateri 3.00 ).00 , )0.40 )*.* (200 )42,(.)43 23,0
stiff sandy lateritic c 4.00 ).00 )2 )(.*0 2(.0 ,00 2)42,.()4 3,0-
stiff sandy lateritic c (.00 ).00 )( )-.(0 3).2 -(0 2*,(.)43
stiff sandy lateritic c *.00 ).00 )0 )3.00 20., *(00 ),(.)42- 4)**
stiff sandy lateritic c .00 ).00 )4 ),.20 2-.) -)00 2(000 4(23
stiff sandy lateritic c ,.00 ).00 )( )-.(0 3).2 -(0 2*,(.)43 (23,
sandy "ethered roc -.00 ).00 ), 23.40 3.4 ))00 32)42.,() *0
sandy "ethered roc )0.00 ).00 )* 20.,0 33.3 )0400 2,().42,* (-(
sandy "ethered roc )).00 ).00 ) 22.)0 3(.4 ))0(0 303(.)42- (-(
sandy "ethered roc )2.00 ).00 ), 23.40 3.4 ))00 32)42.,() *30-sandy "ethered roc )3.00 ).00 )- 24.0 3-.( )23(0 33-2,.()4 ****
sandy "ethered roc )4.00 ).00 20 2*.00 4).* )3000 3()4.2,( 023
completely "etered )(.00 ).00 20 2*.00 4).* )3000 3()4.2,( )42
completely "etered )*.00 ).00 2) 2.30 43. )3*(0 3(00 3,0
completely "etered ).00 ).00 22 2,.*0 4(., )4300 3-2,(.)43 3,
completely "etered ),.00 ).00 23 2-.-0 4., )4-(0 4)0).42,* ,0-(
completely "etered )-.00 ).00 2( 32.(0 (2.0 )*2(0 44*42.,() ,*-0
sand "ith mica 20.00 ).00 2 3(.)0 (*.2 )((0 4,2)4.2,( -404
sand "ith mica 2).00 ).00 2- 3.0 *0.3 ),,(0 (),(.)43 )0)
sand "ith mica 22.00 ).00 2) 2.30 43. )3*(0 3(00 ,4(
sand "ith mica 23.00 ).00 (0 *(.00 )04.0 32(00 ,-2,(.)43 )440
24.20 ).20 (0 *(.00 )24., 32(00 ,-2,(.)43 2)42
,-2,(.)43
).20 0
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skin friction due to sand and "eathered rock )03).*, k
e min (.00 mm for analysis to reinforcement design
capacity 1 k
ock
Socket length / all"able 1niaial com.stress 2 3 Skin friction
fig 4.3- #k&m2$
#m$ #k&m2$ #k&m2$
).2 -0 3000 )(000 0.0* 0., 20 )3,2.4
5otal skin friction due to sand and "eathered rock )03).*,
Skin friction due to rock )3,2.4
nd bearing due to rock 4,0
eduction factor for friction due to use of bentonite in bore considered as 30%
/s allo" /s allo". 6 # /s ult. & 3 $ 4!5(6 '7
/b allo". 80(00 '7
7llo"able load obtained from the partial fact / allo". 6 # /s ult. & 3 $ + /b allo". 105(6 '7
esign capacity of the pile 105 '7
Comment end earing 9it% enoug% so'et lengt%5 %
nd#:uc$ Skin # fu $
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Calculation of Carrying Capacity for Bored Piles chainage 2+233
Matara-Kataragama Railroad Extension Project
1000mm Diameter Bored Pile at B-0!"#1"$
Calculation for Skin frictions
diameter of pile 400 mm safety factor for skin friction 3 reduction factor for bentonite slurry
Poisson ratio 0.3 idth of the pro!ected area of pile
soil and "eathered rock
$ayer Dept% &%'( )P& )'in *riction )'in *riction E
, ased on )P& . , ased on )P& . , ased on )P& . 's#m$ #m$ #k&m2$ #k$ #k&m2$ #k&m3$
0
'ery stiff sandy lateri 0.(0 0.(0 )0 )3.00 )0.4 *(00 ),(.)42-
'ery stiff sandy lateri ).00 0.(0 , )0.40 ,.3 (200 )42,(.)43
'ery stiff sandy lateri 2.00 ).00 * .,0 )2.( 3-00 )0)4.2,(
'ery stiff sandy lateri 3.00 ).00 3 3.-0 *.2 )-(0 (3(.)42,*
stiff sandy lateritic c 4.00 ).00 3 3.-0 *.2 )-(0 (3(.)42,*
stiff sandy lateritic c (.00 ).00 3 3.-0 *.2 )-(0 (3(.)42,*
stiff sandy lateritic c *.00 ).00 4 (.20 ,.3 2*00 )42.,()4
stiff sandy lateritic c .00 ).00 3 3.-0 *.2 )-(0 (3(.)42,*
stiff sandy lateritic c ,.00 ).00 4 (.20 ,.3 2*00 )42.,()4
sandy "ethered roc -.00 ).00 * .,0 )2.( 3-00 )0)4.2,(
sandy "ethered roc )0.00 ).00 )0 )3.00 20., *(00 ),(.)42-
sandy "ethered roc )).00 ).00 )( )-.(0 3).2 -(0 2*,(.)43
sandy "ethered roc )2.00 ).00 )* 20.,0 33.3 )0400 2,().42,*
sandy "ethered roc )3.00 ).00 ), 23.40 3.4 ))00 32)42.,()
sandy "ethered roc )4.00 ).00 23 2-.-0 4., )4-(0 4)0).42,*
completely "etered )(.00 ).00 23 2-.-0 4., )4-(0 4)0).42,*
completely "etered )*.00 ).00 20 2*.00 4).* )3000 3()4.2,(
completely "etered ).00 ).00 20 2*.00 4).* )3000 3()4.2,(
completely "etered ),.00 ).00 )( )-.(0 3).2 -(0 2*,(.)43
completely "etered )-.00 ).00 2( 32.(0 (2.0 )*2(0 44*42.,()
sand "ith mica 20.00 ).00 (0 *(.00 )04.0 32(00 ,-2,(.)43
sand "ith mica 2).00 ).00 (0 *(.00 )04.0 32(00 ,-2,(.)43
sand "ith mica 22.00 ).00 (0 *(.00 )04.0 32(00 ,-2,(.)43
,-2,(.)43
skin friction due to sand and "eathered rock ,2.0, k
e min (.00 mm for analysis to reinforcement design
capacity 18 k
ock
Socket length / all"able 1niaial com.stress 2 3 Skin frictionfig 4.3- #k&m2$
#m$ #k&m2$ #k&m2$
).2 -0 3000 )(000 0.0* 0., 20 )3,2.4
5otal skin friction due to sand and "eathered rock ,2.0,
Skin friction due to rock )3,2.4
nd bearing due to rock 4,0
eduction factor for friction due to use of bentonite in bore considered as 30%
/s allo" /s allo". 6 # /s ult. & 3 $ 404(04
nd#:uc$ Skin # fu $
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/b allo". 80(00
7llo"able load obtained from the partial fact / allo". 6 # /s ult. & 3 $ + /b allo". 684(04
esign capacity of the pile 684
Comment end earing 9it% enoug% so'et leng
18 %
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30 %
0.4 m
)pring Constants
%-1 %-11
cumulati+e epth 0
' '/ K s'in friction 8 8#k&m$ #k&m$ #k&m$ #m$ #k&m$ #k&m$
0 0 0 0
))-0.4*2 )***.**** 2,( )0 0.( 2,( 3()
)(4.*)- 2*)-.04*2 4)* ), ) 4)* (4*
23,0.-(24 ),(.)42- 4)* 30 2 4)* 42,*
)42,.()4 )0).42,( 2(00 3* 3 2(00 ()4
)0).42,* )0).42,( 2)43 42 4 2)43 ,4(2
)0).42,* ))-0.4*)- 22*2 4, ( 22*2 -*2
)30-.(23, )30-.(23,) 2*)- (* * 2*)- ,2)4
))-0.4*2 ))-0.4*)- 23,) *2 23,) -*43
)30-.(23, )***.**** 2-* 0 , 2-* )0-(2
)-04.*)- 2*)-.04*2 4(24 ,2 - 4(24 )22*2
30-(.23,) 4)**.**** 2*2 )03 )0 2*2 )),*
4*).-04, (4*.)-04, )023, )34 )) )023, )2)43
((-(.23,) (-(2.3,0-( ))(4, )* )2 ))(4, )2,(
*)-0.4*2 023.,0-(2 )32)4 204 )3 )32)4 )3()
*)-.04* ,2)4.2,() )(,33 2(2 )4 )(,33 )4)*
,2)4.2,( ,(.)42,* )*0) 300 )( )*0) )440(
(00 )42.,()4 )4*43 342 )* )4*43 )(000
)42.,() *(4.*)-0( )3*-0 3,4 ) )3*-0 )()4
(-(2.3,) *(4.*)-0( )2(00 4)( ), )2(00 )*(4,
3,.0-(2 ))-04.*)- )-*43 4* )- )-*43 ),(
)4,,0.-(2 ),(.)42- 323, () 20 323, )-2,*
),(.)43 ),(.)42- 3()4 *( 2) 3()4 )-(24
),(.)43 0 ),( - 22 ),( )-40(
0 0 3(,33
0 0 2)42-
Skin friction nd bearing#k$ #k$
4,0
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)pring Constants
%-1 %-11
epth 0
8 8#m$ #k&m$ #k&m$
0.00 0 0
0.(0 2,( 3()
).00 4)* (4*
2.00 4)* 42,*
3.00 2(00 ()4
4.00 2)43 ,4(2
(.00 22*2 -*2
*.00 2*)- ,2)4
.00 23,) -*43
,.00 2-* )0-(2
-.00 4(24 )22*2
)0.00 2*2 )),*
)).00 )023, )2)43
)2.00 ))(4, )2,(
)3.00 )32)4 )3()
)4.00 )(,33 )4)*
)(.00 )*0) )440(
)*.00 )4*43 )(000
).00 )3*-0 )()4
),.00 )2(00 )*(4,
)-.00 )-*43 ),(
20.00 323, )-2,*
2).00 3()4 )-(24
22.00 3()4 )-40(
23 3-2,* 3(,33
24.2 2)42- 2)42-
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