DESIGN OF OVERHEAD TANK AT NAI BASTI, JAMMU 1.00 INTRODUC INTRODUCTION TION The following sheets pertain to the design of 2 lakh gallon gallon capacity RCC RCC C The tank is proposed proposed to be built at east of Jammu Jammu city, at ai !asti !asti under #t is basically basically a circular circular int$e int$e type tank with with RCC shaft shaft supportin supporting g the tan on open foundation. 2.00 REFERENCES REFERENCES #% &&'( &&'( )2(( )2((* * Code Code of +rac +ractic tice e for Concr Concrete ete stru structu cture res s for for the the stora storage ge +art - /eneral Reuirements Reuirements +art 2 Reinforced Reinforced Concrete %tructures #% --012 --012 )-*1 )-*1 Criteria Criteria for design design of of RCC RCC staging staging for for overhead overhead water tan tan #% 1' 1' -* -*1' 1' Code Code of +ract ractic ice e for for 3esi 3esign gn 4oads oads 5oth 5other er than than eart earth hua uak k +art 2 #mposed 4oads +art & 8ind 4oads #% -1*& -1*& -*19 -*19 Criteria Criteria for for earth earthuak uake e resist resistant ant desi design gn of stru structu cture res s #% --(1* --(1* -*19 -*19 Code of +ractice +ractice for for 3esign 3esign 7 Constru Construction ction of Ring :ound :ound ;uang uang)h )han an Chu Chu 7 Oma Omarr.:.
3e p t h 8idth
> >
9(( mm 9(( mm
!ottom 3ome #nner Radius
r&
>
9.(( m
Rise
h2
>
-.0( m
t&
>
(.2( m
r2
>
0.(( m
t2
> >
(.9( m 0.&( m
Thickness Cylindrical Tank wall #nner Radius Thickness Aeight
h
Ring beam below wall 3e p t h 8idth
> >
Conical %hell below wall Thickness Btent of shell Ring beam below bottom dome
h&
0(( mm 1(( mm
>
(.0( m
>
9.(( m
3.10 DESIGN CONSTANTS CONSTANTS ?odular ratio
g
m>
*.1- m2@s
>
?&( * .& &
2 1( & σcbc
eutral <is Constant
k>
- .( ( - E 5σ 5σst @ m.σ m.σcbc 6
( .9 2
4ever
">
- ) k@&
( .1 0
D>
(. σcbc k "
- .1 (
?OR constant
@mm2
4.00 DESIGN VOLUME VOLUME =olume of water w ater inside tank
Total Total height of structure structure above ground
2 2 π & 5r- E r2 6 5 h ) h b 0 > &. & .- 9 - 2 & - .2 ( E 0.((
>
>
*2(.0 m&
>
&(.( m
5.00 DESIGN DESIGN OF TOP DOME 4ive 4oad on dome roof
?a.5(.9, (.' ) (.2h -2@52r-626 >
> >
2π
- ( .( (
>
%elf weight of roof Total Total 4oad on dome, dome, w
>
( .- (
>
&.-9 k@m2
2 9 .( (
>
:rom geometry of dome , we have R2 ) 5R )
sin θ > θ> cos θ >
2.((
62 >
0 .( ( 2
R>
-(.((( m
>
0 .( ( > -(.(((
3 2R
&0.1' o
5
( .0 ( ( (
(.099 rad.6
(.1((
.-( Aoop stress at springing level >
wR cosθ cosθ )
-
>
Total Total 4oad of dome
T-(
H > > >
c.g of this load
>
%urface
> >
&*2.'( mm2
2(( mm c@c >
* ' 2 .( ( --2.(( 1 .0 1 m
- ( .( (
where
h- > R>
above the centre of t
6.00 DESIGN OF RING BEAM AT AT JUNCTION OF TOP DOME !ALL !ALL Aoop tension on ring beam
>
%teel area red.
+rovide
0
8eight of beam
> >
1 & .0 -
-&(
>
o. bars
-2
Aoop stress in concrete
=olume of beam
T cosθ cosθ .3 2
mm bars >
>
>
0.2& m&
>
-9*.* k
".00 DESIGN OF C#LINDRICAL C#LINDRICAL SIDE !ALL !ALL
- (( (
>
0'1.1 mm2
5>
T >
2π
- ' .9 2 1 & .0 - k
1 & .0 -0 (( ( (
E
>
(.( @mm2
I
-.( @mm2 0 .2 (
$.00 DESIGN OF RING BEAM AT AT BOTTOM OF !ALL 4ength of beam
> >
2π 9(.2-
4oad of dome on beam
>
& ( - . * > 9(.2-
'.( k@m
4oad of top ring beam
>
- 9 * . * > 9(.2-
&.'2 k@m
4oad of wall on beam
>
2&0.(9 > 9(.2-
1.* k@m
%elf weight of beam
> >
Total Total vertical load on beam =- >
m
0 .9 (
( .0 ( --.2 k@m
( .1 (
' . ( E 1-.&& 1-.&& k@m k@m
& .' 2
tan)-
h&
E
>
-.( @mm2
F ?in. shear steel, +rovide
9
%hear %teel provided
> -(
(.9b.d fy mm H
>
-9'0.*2 mm2
2(( mm c@c >
-'(.1( mm2
%.00 DESIGN OF CONICAL DOME The conical dome shall be designed for a6 Aoop Aoo p Tension Tension b6 ?eridonial thrust
0 .& (
-(.&(
2.((
>
50.& E -(.&6 2
at this location. Aoop tension
cosec.θ > 5 p cosec.θ
A
>
Aence, A
>5 >
> 50.& E -(.& > 2 p
6 3@ 2
1 .& (
m
>
1 .& (
* .1 - >
>
( .0 ( (
2 9 .( ( >
E
- 9 .9 (
1 * .9 ( 0( (( ( (
E
0&.9& o 1-.92 1*.9( k
Aoop stress in concrete
5both faces6
cot.θ cot.θ
E
1*.9(
- .- 2
>
-& (
T >
-( ((
>
>
(.*2 @mm2
I
-.( @mm2 9&&.10 @mm2
&&& DESIGN DESIGN OF BOTTOM DOME Total Total 4oad on dome, dome, w
>
220.* k@m2
:rom geometry of dome , we have R2 ) 5R )
-.0(
sin θ >
62 > R>
.1 ( m
>
9 .( ( > .1 (
3 2R
θ> cos θ > 8ater 4oad on dome
9 .( ( 2
( .0 1 * '
9&.0( o (.'29 > π
9 .( (
>
9*90.'- k
>
2π
2
-(.&(
.1 (
)
Aence, providing minimum steel of (.29G as per #%&&'() 2((* +art ##, we c.g of this load
>
& 52R ) h-62 9 5&R ) h-6
> >
& ( ( .( ( 0&.2( 9 .' m
where
h- > R>
above the centre of t
11.0 DESIGN OF RING BEAM AT AT JUNCTION OF BOTTOM DOME SHAFT 8eight of water 8eight of top dome 7 ring beam 8eight of side wall 7 ring beam 8eight of conical wall 7 bottom dome %elf wt. of beam Total Total 4oad on beam 4oad intensity on beam
>
> * 2 ( .0 > & ( - . * E > 2 & 0 .( 9 E > 2 & - & .( 2 E >2π >2 π (.0 (.1 29
>
-2-&.&* 2.-& 0(.&2 k@m
α
>
0 & .9 & o
β
>
9 & .0 ( (
Thrust from conical conical slab
> >
9-.-1 E -(0**.9 k k
Thrust intensity of T-
>
-(0**.9 >
21-*.2* E
92.'2 k@m
12.0 DESIGN OF ANNULAR R.C.C R.C.C SHAFT /rade of Concrete
>
<% per #% --012-*1, ?in. thickness of shaft
F
Aence, provide thk
F >
t
Opening si$e at base
> β>
:rom sketch, sketc h, 8ind +ressure considered w>
-.( k@m2
?&(
-( E 53)0(((6 - 2( -00.0' mm 2((.(( mm
where 3
-.(( m 2.-(m ( .- 2
> >
:rom #% --012, we have
?a. compressive stress in concrete
5
Bc β ?# :o #
> > > >
((( fck > 1.0
π52r6&.t @1
> 0.25 1.5
?edium Bmpty ' ( ( 0 .2 -
5k6 5m6
> >
δ>8l&@&B# 2π δ @ δ @ g %a@g β.#.:o.%a@g
Aori$ontal %eismic CoeLcient !ase shear, A 5km6 !ase ?oment, ? 5km6 e@r ?a. compressive stress in conc. 5?pa6 +ermissible stress 5?pa6
( .( 2 ( (.21 (.2( (.(' 2 .9 ' - ( ( * .& ( .& ( & .( & - ( .0 0 OK
14.0 DESIGN OF CIRCULAR RAFT RAFT FOUNDATION FOUNDATION
ircular Overhead Overhea d Tank. he water supply pro"ect. and the shaft is rested
f liuids
ks 6 for buildings 7 structures
ation himney foundations
r&
?2 -(.*1 (.2* (.*( -.--
6 E 2 5r22 E r2.r& E r&26 h& 0(1.((
)
) 5&r&2 E h226 h2 1(.*(
V, H'+' OK
(.'9 k@m2 2.(( -2.00 m2 2.9( k@m2
& - .& 0
-2.00
(.29
OK
ding 2 .( (
2.(( 2.(( m -(.( -( .(( (m
he sphere
2.9(
(.1((
0.((
09&.-* mm2
6
OK -((( 0
OK ( .9 (
(.9(
29
1 . *
0&.9& o
E
--.2
OK @m
@m
OK
2 .( (
>
-0.0( m2
1-.92 k@m2 -9.9( k@m2
( . (
6
0.((
-((( 9(*(0
OK
- .0 ( 2 5 & - .0 ( >
& .1)-.06
* .1 -
1.&- m2
have -.0( -.0( m .1( .1( m
he sphere
ALL * .1 - > -9*.* > 90&.2 > 2'*.11 > >
2&-&.(2 E
*(&-.9 k 9-.-1 k 21-*.2* k 2*2.*( k &-1.91 k -2-&. -2-&.&* &* k
--.*0
internal dia of shaft 1((( 1( (( mm
OK
2'&10 @mm2 9&.&( m9
:ull -0(&'.'9 (.(9 (.92 (.-1 (.(01 -(12. 2-0(.* (.&( 0.2( -(.00 OK
BILL OF UANTITIES FOR R.C.C OVERHEAD TANK S. I'*) C+'' -.(( Top 3ome
2π 2π
M'-)7'*' -(.(( 2.(( -(.(( 2.((
( .- (
2.(( Top dome beam
2π 2π
0.2( 0.2(
(.9( -.2(
( .9 (
&.(( %ide wall
2π 2π
0.2( 0.2(
(.9( - 2 .0 (
0 .& (
9.(( !eam below wall
2π 2π
0.9( 0.9(
(.0( 2.((
( .1 (
π π
9.' 9.'
(.0( - - .2 (
--.2(
2π 2π
.1( .1(
-.0( -.0(
( .2 (
.(( Conical Conical slab
0.(( !ottom dome
2
+ile cap 8idth > &((( 3epth > -(((
2π 2π
9.-( 9.-(
&.(( -.((
- .( (
π 2π
'.1 '.1
'.1 -.((
- .( (
9π 9π * * -
( .- 2
OR %olid Circular :ooting
-(.(( 8alkway -(.-(
-.(( m wide (.-2 m thk -.(( m wide (.-2 m thk -.( m wide (.- m thk .(( m wide (.& m thk -.*( m wide (.- m thk (.( m wide (.- m thk
0.*( 0.*( -.(( -.(( -.( -.( .(( .(( -.*( -.*( (.( (.(
-.(( -.(( -.(( -.(( -.( -.( (.' .(( -.(( -.*( -.(( (.(
( .- 2 ( .- (.& (.- (.-
-'.( %haft -'.0( +artition wall -'.'( 8alkways alkways
outside inside outside inside outside
2π 2π 2π 2π
9.(( 9.2( .'( .*(
2 ( .( ( 2 ( .( ( 0.&( 0.&(
V7*' ;* < - 2 . ' 3
F*=> ;*2< L': ;*<
H#SD S'' ;MT< (.'G (.1(
-2.00 0 .2 &
- . (G
(.'(
2.'G
2-.0(
-.((G
-.(
&.((G
2&.2(
(.'G
(.'(
90.' * 1 .- ' 9*(.19 - * .& ( 1(.92 * 0 .& 1 &2-.2 - - .0 0 1.&-
' ' .2 1
2.'G
-'.((
2.((G
&-.((
-.(G
-.2(
- . (G
(.-(
- . (G
(.((
- . (G
(.2(
- . (G
(.((
- . (G
(.((
2.'0
- * & . * 9*.&2
- ( .9 ( 10.'- .( 1 *.(( ( .& 9 2.2 - .& 2.(( ( .2 * &.0( .( 1 (.2
-2.00 (2.0 2'.'* 22.0& 2&&. -20.12
3etailed +ro"ect Report) ew OATat Jewargi Town
;arnataka ?unicipal Reforms +ro"ect 5;?R+6
Civil Work Items - RCC Over e!" #!nk #!nk o$ 2%%% c&.m c!p!city !n" over 3%m st!'in' (ei'(t Si. No. Description 1
Unit
Qty.
Earth work excavation 0 to 2 mtr Depth a In all soils soils
Cum
59.00
b In disintegrated rock so!t rock wihtout resorting resorting to blasting. 2m to " mtr Depth
Cum
c Earthwork in excavation !or !oundation !or pile caps in all t,pes o! strata other than hard rock upto +m depth Cum 2
3
'oring in all t,pes o! soil -excluding rock !or piling o! )00 dia piles including protection o! sides b, either using temporar, liner or driller/s mud etc. complete
#.$
25.00
%CC $&.5' below pilecap
Cum
(.00
Cum
&.)0
Cum
2*2.*0
Cum
&&.+0
%CC $10' within sha!t wall wall area at ground level
4
%roviding $+5 !or #.C.C. )00 dia cast in situ bored piles each o! load capacit, as designed place through steel shell sunk to the reuired depth through all t,pe o! strata excluding provision provision o! rein!orcement including placing concrete b, tremm, arrangment including all leads and li!tscompaction o! concrete including chipping and dressing dressing o! #CC %ilescleaning the rein!orcement etc complete.
%ilecap
3etailed +ro"ect Report) ew OATat Jewargi Town
;arnataka ?unicipal Reforms +ro"ect 5;?R+6
Si. No. Description
)
#CC $ +0C grade concrete !or #CC ha!t.
*
#CC $ +0C grade !or #CC work -excluding cost o! rein!orcement
Unit
Qty.
102.20
3op middle and bottom ring beam
Cum
+*.(0
'ottom dome
Cum
11.))
Conical dome
Cum
().+*
4alkwa, lab
Cum
1+.50
ide wall
Cum
(*.20
3op dome
Cum
12.)0
Internal #CC Circular %artition wall
Cum
").00
3etailed +ro"ect Report) ew OATat Jewargi Town
;arnataka ?unicipal Reforms +ro"ect 5;?R+6
Si. No. Description
Unit
Qty.
Cement mortar plastering 17+ proportion 12 mm thick !or both inside and outside sur!ace !or top dome
Cum
+.10
,
6D steel rein!orcement
$ 3on
1+2.00
%lastering in C.$. 17+ proportion including smooth !inishing with minimum 28 o! approved ualit, o! water water proo! compound !or #CC over head tank and giving satis!actor, water water proo! testing !or side walls shell shell portion bottom dome bottom slabs m
5)".(0
+
1%
11
3wo coats o! water proo! cement painting o! approved colour and shade over one coat o! primer be!ore removal o! sca!!olding !or new #.C.C. over head tanks
2&&(.+0
$.. ladder "5 cms. wide using angle iron iron o! si9e )5 mm x )5 mm x * mm and 20 mm $.. bars at 25cms. centre to centre with necessar, supports o! same angle iron as directed including hand railing on both sides with 25mm dia :.I. pipes with angle iron props at 2 mtrs interval and 0.5 mtr height 2+.00
12
$.. Inspection door o! si9e )0 cms x )0 cms. including $.. !rame si9e 50 x 50 x ) mm and shutters o! +mm thickness with hinges at top and locking arrangements painting 1
13
;luminium monke, ladder "5 cms. wide including including hand railing < cage to be provided inside the tank
1).00
3etailed +ro"ect Report) ew OATat Jewargi Town
;arnataka ?unicipal Reforms +ro"ect 5;?R+6
Si. No. Description
14
Unit
uppl,ing < !ixing "0 mm dia :.I . medium dut, pipes hand railing + rows !ixed to 1727" -$150 vibrated #.C.C. post o! si9e 100 x 150 mm at top and 150 x 150 mm at bottom placed at 2 $tr. intervals !or a height o! &50 mm painting :.I. pipes with two coats o! anticorrosive steel paint over a primer coat $tr
1)
1*
Qty.
11&.(0
%ull and push t,pe rolling shutters o! approved make as per speci!ications
#e!illing pipeline trenches and !oundation with selected available earth !rom trench excavation and !oundation
m
+.15
Cum
"1.00
