8/10/2019 Micropile Design 6Y22
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STL Drilling Sdn. Bhd.Date:01/14/2015 1 of 2
Reference: 70 Ton Safe Working Load Micro-pile ( 250mm)
Date: 29-Nov-01
Micropile Deign
Johnn Then- De!ign "i#ro$ile #al#%lation - &o$ right
10/10/2001 &all Johnn Then 019-'20(4(2
Working Load ! 70 )Tonne!*
") Material #ropertie
$) %ro&t
&o+$re!!ive Strength ,t 2' da! '000 N/++2 f#%
ater &e+ent atio 05 - 050
ong! "od%l%! 3# 2**0 N/++2
Johnn Then- De!ign "i#ro$ile #al#%lation - &o$ right
10/10/2001 &all Johnn Then 019-'20(4(2
+) #ipe Reinforcement , "# .aing
einfor#e+ent 7T25
Dia+eter of Steel Bar 2500 ++
N%+er! of !teel ar 7 n%+er!
,rea 6f Steel ar ''*$2 ++2
De!igned ield Strength f *000 N/++2
Johnn Then- De!ign "i#ro$ile #al#%lation - &o$ right
10/10/2001 &all Johnn Then 019-'20(4(2
o%ng! "od%l%! 3!t 20500 N/++2
.) /ltimate Load
Str&ct&ral .apacit - "1ial +earing .apacit
Metod $ +aed 3n +S 5004 .la&e $$'74
/ltimate Strengt 3f "1iall Loaded .oncrete
illed .irc&lar 6ollo Steel Section
7%lt 0.91 ,!t f 8 0.45 ,# f##.
7%lt lti+ate &a$a#it of 7ile
,!t ,rea of igh Ten!ile !teel ar!
f i! a red%#ed No+inal ield Strength of Steel Bar ;iven f
&2f.
,# Nett ;ro%t ,rea.
f## i! an 3nhan#ed &hara#teri!ti# of Tria
8/10/2019 Micropile Design 6Y22
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STL Drilling Sdn. Bhd.Date:01/14/2015 2 of 2
>or or?ing Load 6f 700 Tonne!
Borehole Dia+eter D 25000 ++
;ro!! ,rea ,g 8097'8 ++2
,rea of ;ro%t ,# 5*5$27 ++2
e@%ired Safet >a#tor 2
AAA 7%lt 1 2057 Tonne!
>a#tor of Safet 28 (3)
Johnn Then- De!ign "i#ro$ile #al#%lation - &o$ right
10/10/2001 &all Johnn Then 019-'20(4(2
Metod 2 +aed on Safe Load 3f Steel Reinforcement telf
lti+ate &a$a#it 7%lt f "
AA $590* Tonne!
>a#tor 6f Safet 2' (3)
rom Te Metod 24 Te Minimi&m Safet actor i $0 and Te
Ma1im&m Safet
3f actor i 20
Johnn Then- De!ign "i#ro$ile #al#%lation - &o$ right
10/10/2001 &all Johnn Then 019-'20(4(2
6ence4 te Str&ct&ral .apacit i 3
Johnn Then- De!ign "i#ro$ile #al#%lation - &o$ right
10/10/2001 &all Johnn Then 019-'20(4(2
