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Name of work :- pkn1 Tank capacity 400 K ltr 400000 ltr
2 Depth of water 4.00 mtr 4000 mm
3 Free board 0.20 m 200 mm
4 Conrete 20 !nit wei"ht 25000
7 m 13.3
# $teel fy 415 Ten%ile %tre%% 230
& Nominal Co'er 25 mm (ffecti'e Co'er 30 mm
) Reinforcement*oop% +in" 20 150 mm c,c
erti'cal 10 160 mm c,c
Floo ain 8 200 mm c,c
Di%trib!tion 8 200 mm c,c
.
. mm c,c
DESIGN OF CIRCULAR WATER TANK (Flaxible joint)
N,m 3
cbc N,mm 2
N,mm 2
mm
mm
mm
mm
mm +in"
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+(F m
. +(F m
. mm c,c
.
. mm c,c +(F m
.. . mm c,c. mm c,c +(F m .
$trip paintin" . mm c,coint %ealin" compo!nd
.
mm +in"
mm +in"
mm +in"mm +in"
mm +in"
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+(F
.
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DESIGN OF CIRCU !R "!#ER #!N$%F&'(i)&e *oint+N'me of ,or- / -n
REF 400 4..... mmREF 4.00 m 4... mmREF 0.20 2.. mm
REF 20REF f 415 #en i&e te 23.
7 13 3Nomin'& co er 2# mm Effecti e co er 3. mm
Design Constants ! For *5$D 6ar% Cocrete 7 2.
= 23. wt of concrete 7 2#...= ) m = 13 3
m8c7
13 3 9 )7 0.28813 3 9 ) 23.
= 1 - . 2;; , 3 7 0. 04= . # 9 ) 9 .
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$pacin" of hoop 6ar% 7 1... 9 314 , #1. 7 &1& %ay 7 &1. mm
*owe'er@ the %pacin" of hoop% %ho!ld not more than 3 time% of thickne%% of wall *ence keep a %pacin"#.. mm c,c at the top $ince the thickne%% of wall i% le%% than 22# mm reinforcement pro'ided at the
center of thickne%% ?f@ howe'er@ the thickne%% i% more than 22# mm @ half the hoop% wo!ld ha'e been planear the inner face and other half at the o!ter face Ai e the %paci" of the hoop% wo!ld ha'e been do!bled
The %pacin" at the other hei"ht can be %imilarly fo!nd For e9ample at the depth of 2 .. m below
top@ the area of hoop% i% "i'en by =%h 7w h D,2
7ro'ided 160
Design o" tan' "loo$ ! $ince the tank floor i% re%tin" on "ro!nd thro!"ho!t @ pro'ide a minim!m thickne%% of 1#.
7. 3.
9 1#. 9 1... 7 4#.1..
>ro'ide half the reinfocement near each face@ =%t 7 22#
!%in" ; mm bar% = 7 73 14 9 ; 9 ;
7 504 91.. 4 9 1..$pacin" of hoop 6ar% 7 1... 9 #. , 22# 7 223 %ay 7 2.. mm
*owe'er pro'ide ; 2.. mm c,c in both direction @ at top and bottom of floor %labThe floor %lab will re%t on )# mm thick layer of lean concrete co'ered with a layer of tar felt
Detail o" $ein"o$%e&ent ! The detail %hown in drawin"
pk/nandwana0yahoo co in
mm 2%
= %d mm 2
3 149dia2
mm bar@ 0 mm c,c Thi% wil al%o %er'e the p!rpo%e of tiein" the hoop reinforceme
inim!m = %t mm 2 in each direction
mm 2
3 149dia 2
mm bar% 0
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pk/nandwana0yahoo co in
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m
ba%e
mm
mm 2
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f
edBthe
mm
mm 2
t
mm 2
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+(F
+(F +(F
1). 11&.. 1).
+(F+(F mm c,c +(F m
+(F +(F m+(F mm c,c
4...+(F+(F mm c,c +(F m
+(F+(F +(F mm c,c+(F mm c,c +(F m +(F
$trip paintin" +(F mm c,coint %ealin" compo!nd
+(F+(F
mm +in"
mm +in"
mm +in"
mm +in"mm +in"
mm +in"
pk/nandwana0yahoo co in
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?! UES OF DESIGN CONS#!N#Srade of concrete -1# -2. -2# -3. -3# -4. rade of conc
od!lar +atio 1; &) 13 33 1.
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+eiforcement
!*+ !*+ b, b,
. 1# . 1; . 1; . 1#
. 1& . 1; . 1< . 1;
. 1) . 1; . 2 . 21
. 1; . 1< . 21 . 24
. 1< . 1< . 22 . 2). 2 . 1< . 23 . 3
. 21 . 2 . 24 . 32
. 22 . 2 . 2# . 3#
. 23 . 2 . 2& . 3;
. 24 . 21 . 2) . 41
. 2# . 21 . 2; . 44
. 2& . 21 . 2< . 4)
. 2) . 22 . 3. . #
. 2; . 22 . 31 . ##
. 2< . 22 . 32 . &. 3 . 23 . 33 .
. 31 . 23 . 34 . )
. 32 . 24 . 3# . )#
. 33 . 24 . 3& . ;2
. 34 . 24 . 3) . ;;
. 3# . 2# . 3; .
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. & . 32. &1 . 32. &2 . 32. &3 . 32. &4 . 32. . 33
. && . 33
. &) . 33
. &; . 33
. &< . 33. ) . 34
. )1 . 34
. )2 . 34
. )3 . 34
. )4 . 34
. )# . 3#
. )& . 3#
. )) . 3#
. ); . 3#
. )< . 3#. ; . 3#
. ;1 . 3#
. ;2 . 3&
. ;3 . 3&
. ;4 . 3&
. ;# . 3&
. ;& . 3&
. ;) . 3&
. ;; . 3)
. ;< . 3)
. < . 3).
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1 11 . 41 12 . 41 13 . 41 14 . 41 1# . 41 1& . 41
1 1) . 411 1; . 411 1< . 411 2. . 411 21 . 411 22 . 411 23 . 411 24 . 411 2# . 421 2& . 421 2) . 421 2; . 42
1 2< . 421 3. . 421 31 . 421 32 . 421 33 . 431 34 . 431 3# . 431 3& . 431 3) . 431 3; . 431 3< . 431 4. . 43
1 41 . 441 42 . 441 43 . 441 44 . 441 4# . 441 4& . 441 4) . 441 4; . 441 4< . 441 #. . 4#1 #1 . 4#1 #2 . 4#
1 #3 . 4#1 #4 . 4#1 ## . 4#1 #& . 4#1 #) . 4#1 #; . 4#1 #< . 4#1 &. . 4#1 &1 . 4#
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1 &2 . 4#1 &3 . 4&1 &4 . 4&1 . 4&1 && . 4&1 &) . 4&
1 &; . 4&1 &< . 4&1 ). . 4&1 )1 . 4&1 )2 . 4&1 )3 . 4&1 )4 . 4&1 )# . 4)1 )& . 4)1 )) . 4)1 ); . 4)1 )< . 4)
1 ;. . 4)1 ;1 . 4)1 ;2 . 4)1 ;3 . 4)1 ;4 . 4)1 ;# . 4)1 ;& . 4)1 ;) . 4)1 ;; . 4;1 ;< . 4;1
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2 13 . #.2 14 . #.2 1# . #.2 1& . #.2 1) . #.2 1; . #.
2 1< . #.2 2. . #.2 21 . #.2 22 . #.2 23 . #.2 24 . #.2 2# . #12 2& . #12 2) . #12 2; . #12 2< . #12 3. . #1
2 31 . #12 32 . #12 33 . #12 34 . #12 3# . #12 3& . #12 3) . #12 3; . #12 3< . #12 4. . #12 41 . #12 42 . #1
2 43 . #12 44 . #12 4# . #12 4& . #12 4) . #12 4; . #12 4< . #12 #. . #12 #1 . #12 #2 . #12 #3 . #12 #4 . #1
2 ## . #12 #& . #12 #) . #12 #; . #12 #< . #12 &. . #12 &1 . #12 &2 . #12 &3 . #1
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2 &4 . #12 . #12 && . #12 &) . #12 &; . #12 &< . #1
2 ). . #12 )1 . #12 )2 . #12 )3 . #12 )4 . #12 )# . #12 )& . #12 )) . #12 ); . #12 )< . #12 ;. . #12 ;1 . #1
2 ;2 . #12 ;3 . #12 ;4 . #12 ;# . #12 ;& . #12 ;) . #12 ;; . #12 ;< . #12
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3 1# . #1
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-1. -1# -2. -2# -3. -3# -4. -4# -#.-- . & . ; . < 1 1 1 1 2 1 3 1 4
De e&o ment en>t: in ten ion
>lain $ 6ar% * 5 $ D 6ar%
. & #; .
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. 4 . ; 1 2 1 &>ercenta"e of ten%ion reinforcement
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2 4 2 ;
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?! UES OF DESIGN CONS#!N#Srade of concrete -1# -2. -2# -3. -3# -4. rade of concret
od!lar +atio 1; &) 13 33 1.
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!*+ !*+ b, b,
. 1# . 1; . 1; . 1#
. 1& . 1; . 1< . 1;
. 1) . 1; . 2 . 21
. 1; . 1< . 21 . 24
. 1< . 1< . 22 . 2). 2 . 1< . 23 . 3
. 21 . 2 . 24 . 32
. 22 . 2 . 2# . 3#
. 23 . 2 . 2& . 3;
. 24 . 21 . 2) . 41
. 2# . 21 . 2; . 44
. 2& . 21 . 2< . 4)
. 2) . 22 . 3. . #
. 2; . 22 . 31 . ##
. 2< . 22 . 32 . &
. 3 . 23 . 33 . . 31 . 23 . 34 . ). 32 . 24 . 3# . )#. 33 . 24 . 3& . ;2. 34 . 24 . 3) . ;;. 3# . 2# . 3; .
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. &) . 33
. &; . 33
. &< . 33. ) . 34
. )1 . 34
. )2 . 34
. )3 . 34
. )4 . 34
. )# . 3#
. )& . 3#
. )) . 3#
. ); . 3#
. )< . 3#. ; . 3#
. ;1 . 3#
. ;2 . 3&
. ;3 . 3&
. ;4 . 3&. ;# . 3&
. ;& . 3&
. ;) . 3&
. ;; . 3)
. ;< . 3). < . 3)
.
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1 21 . 411 22 . 411 23 . 411 24 . 411 2# . 421 2& . 421 2) . 421 2; . 421 2< . 421 3. . 421 31 . 421 32 . 421 33 . 431 34 . 431 3# . 431 3& . 431 3) . 43
1 3; . 431 3< . 431 4. . 431 41 . 441 42 . 441 43 . 441 44 . 441 4# . 441 4& . 441 4) . 441 4; . 441 4< . 44
1 #. . 4#1 #1 . 4#1 #2 . 4#1 #3 . 4#1 #4 . 4#1 ## . 4#1 #& . 4#1 #) . 4#1 #; . 4#1 #< . 4#1 &. . 4#1 &1 . 4#1 &2 . 4#1 &3 . 4&1 &4 . 4&1 . 4&1 && . 4&1 &) . 4&1 &; . 4&1 &< . 4&1 ). . 4&1 )1 . 4&1 )2 . 4&
1 )3 . 4&1 )4 . 4&
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1 )# . 4)1 )& . 4)1 )) . 4)1 ); . 4)1 )< . 4)1 ;. . 4)1 ;1 . 4)1 ;2 . 4)1 ;3 . 4)1 ;4 . 4)1 ;# . 4)1 ;& . 4)1 ;) . 4)1 ;; . 4;1 ;< . 4;1
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2 2< . #12 3. . #12 31 . #12 32 . #12 33 . #12 34 . #12 3# . #12 3& . #12 3) . #12 3; . #12 3< . #12 4. . #12 41 . #12 42 . #12 43 . #12 44 . #12 4# . #1
2 4& . #12 4) . #12 4; . #12 4< . #12 #. . #12 #1 . #12 #2 . #12 #3 . #12 #4 . #12 ## . #12 #& . #12 #) . #1
2 #; . #12 #< . #12 &. . #12 &1 . #12 &2 . #12 &3 . #12 &4 . #12 . #12 && . #12 &) . #12 &; . #12 &< . #12 ). . #12 )1 . #12 )2 . #12 )3 . #12 )4 . #12 )# . #12 )& . #12 )) . #12 ); . #12 )< . #12 ;. . #1
2 ;1 . #12 ;2 . #1
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2 ;3 . #12 ;4 . #12 ;# . #12 ;& . #12 ;) . #12 ;; . #12 ;< . #12
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-1. -1# -2. -2# -3. -3# -4. -4# -#.-- . & . ; . < 1 1 1 1 2 1 3 1 4
De e&o ment en>t: in ten ion
>lain $ 6ar% * 5 $ D 6ar%
. & #; .
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