7/23/2019 bore hole

1/8

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

7/23/2019 bore hole

2/8

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 $

7/23/2019 bore hole

3/8

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 $

7/23/2019 bore hole

4/8

/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 %

7/23/2019 bore hole

5/8

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

'7

7/23/2019 bore hole

6/8

'7

'7

'7

t%

7/23/2019 bore hole

7/8

)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-

7/23/2019 bore hole

8/8