7/25/2019 pipe restraint length calculation

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Designed by HACJ Approved by

Checked by GDMP Date

Fitting soil Type

Horizontal bend DI C !"# $ !"!# % !& bar !'&& %% $# %% %% %%

ite (a%e ) !#"' %

ite (otes )

De*ned +ariables Calc,lations -or Horizontal bend

H. !"' % Depth o- /,rry

!"# a-ety Factor . 0 1 H 1 D . '2"2332

P. !&&&"& Internal Pres,re 4 . . 25"$''2 (or%al -orc

9. $#"&& /end Angle . . '"!53 :ankin pass

. H < D7' . !"=5$2# Depth -ro%

. . =!"&&>'

. ? 1 6D7'8 . '"&'#'>

. . =="3!> /earing resi

Pipe Derived +ariables . . '&"#2>5 Frictional re

A. !">&=> Cross ection Area o- pipe @ . . !#"'>3= Mini%,% :

D. !"'35> % ,tside Dia%eter>"3!&2 k(7% 4eight o- pipe

!'"'>$3 k(7% 4eight o- Bater in pipe

Polytheneencased pipe yes

De*ned +ariables 6oil8

&"& Cohession Modi*er Coe;cient

c. &"& Cohession o- soil

&"=# Friction Angle Modi*er

. ''"& Internal Friction Angle o- soil

Greater Colombo Water & WastewaterManagement Improvement InvestmentProgramme (GCWWMIIP)

PipeMaterial

a-ety-actor

TrenchType

Depth o-/,ry

TestPress,re

(o%inalize

/endAngle

/ranchize

@engthAlong :,n

:ed,cedsize

-. 4

E (or%al -orc

k(7%' '4E < 4P < 44

p tan'66$#

7/25/2019 pipe restraint length calculation

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0. !3"& oil Density

&"3# Trench Co%paction Modi*er Cha

k(7%>

(.

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DESIGN SECTION

% !#"' % %

!#"' %

e acting on pipe line 6k(7%8 ive press,re coe;cient

s,r-ace to pipe center 6%8

stance o- pipelines 6 k(7%8

sistance 6 k(7% 8

straint length 6%8

@oBsideDepth

:estraint@ength

:estraint@ength'

e d,e to soil 6k(7%>8

assive soil press,re 6k(7%'8

on Hal- o- Circ,%-erence 6%'7%8

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na Jaya%angala