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1 of 22 .
PT. PERTAMINA EPASSET 2
PEMBELIAN & PEMASANGAN FASILITAS KOMPRESORUNTUK GAS MUSI TIMUR
FIELD PENDOPO
APVD
PT. INDOTURBINE PT. PERTAMINA EPREV DESCRIPTION DATE
BY CHKD APVD CHKD
ISSUED FOR REVIEW 03/10/2014 AYP TR ZN
B ISSUED FOR APPROVAL 28/11/2014 NGM AYP ZN
A
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
2 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
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APPROVAL SHEET
PAGEREVISIONS
REMARKS PAGEREVISIONS
REMARKS
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3 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
ISSUED FOR REVIEWA
REVISION SHEET
Rev.
No.Date Description
4 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
COMMENT SHEET
Comments :
B 23/10/2014 Attach pile properties (Revised)
Pile group efficiency (Revised)
REV NO. DATE DESCRIPTION
5 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
Page
1.0 INTRODUCTION …………………………………………………………………………………….............................................. 6
2.0 DEFINITION OF TERMS ………………………………………………………………………....................................... 6
2.1 Applicable Documents ……………………………………………………………………………………..................................... 6
2.2 International Code …………………………………………………………..………………….............................................. 6
2.3 Reference …………………………………………………………...………….................................................................. 6
3.0 GENERAL REQUIREMENTS ………………………………………………………………...…………………………............ 7
3.1 Material …………………………………………………………………………………..……........................................... 7
3.2 Unit Weight …………………………………………………………………………………...…................................................ 7
4.0 LOADING ANALYSIS ………………………………………………………………………………………....................................... 7
4.1 Load ……………………………………………………………………………………......................................... 8
4.2 Temporary Load ……………………………………………………………………………………......................................... 8
4.3 Load from Pile Cap (Each Support) ……………………………………………………………………………………......................................... 8
5.0 SOIL DATA PROPERTIES ……………………………………………………………………………………..................................... 9
6.0 PILING DESIGN ……………………………………………………………………………………......................................... 9
6.1 Mini Pile Properties …………………………………………………………………………………….................................. 9
6.2 Resume Allowable Capacity …………………………………………………………………………………….......................... 9
6.3 Pile Group Plan ……………………………………………………………………………………......................................... 9
7.0 PILE CAP REINFORCEMENT …………………………………………………………………………………….............................. 11
8.0 SKETCH ……………………………………………………………………………………......................................... 13
Table Of Contents
6 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
1.0 INTRODUCTION
2.0 DEFINITION OF TERMS
2.1 Applicable Documents
GCMT-13-MS-DS-002 : Mechanical Data Sheet LP Separator
GCMT-13-CIV-SPC-002 : Civil Specification for Concrete Design and Materials
GCMT-13-CIV-SPC-004 : Civil Specification for Foundation
GCMT-13-CIV-SPC-012 : Civil Specification for Piles
2.2 International Code
a. ASCE 7-02 : Minimum Design Loads for Buildings and Other Structures
b. UBC 97 : Uniform Building Code 1997
c. ACI 381-05 : American Concrete Institute
2.3 Reference
a. Soil Report
b. Principles of Foundation Engineering by Braja M Das, 1990
c. Analisis dan Perancangan Fondasi II by Hary Christady Hardiyatmo, 2010
d. Renforced Concrete : A Fundamental Approach by Edward G. Nawy, 2008
The purpose of this calculation is to design of KO Drum Foundation for Gas Compressors Facilities Musi Timur – Field Pendopo
Project which is owned and operated by PT. Pertamina EP.
The following words if found elsewhere in this document shall have the meaning
as follow :
PERTAMINA EP PT. Pertamina EP Asset 2 as the owners and users of the facility.
SUB-CONTRACTOR
Companies or entities specified and as representative CONTRACTOR to carry out
some or all of the work “Pembelian & Pemasangan Fasilitas Kompresor Untuk Gas
Musi Timur – Field Pendopo”.
VENDOR / SUPPLIER
Companies or entities that provide materials, equipment, documents / drawings and
technical service to carry out the work specified by the CONTRACTOR or Pertamina
EP.
CONTRACTOR
PT. Indoturbine, company or entity designated by Pertamina EP to carry out all the
work “Pembelian & Pemasangan Fasilitas Kompresor Untuk Gas Musi Timur – Field
Pendopo”.
CONSULTANTParties who have been appointed by Pertamina EP as an engineering consultant for
this project.
MIGASRepresentatives from the Indonesian government that is responsible in issuing
licenses and permits oil and gas facilities.
PROJECTPembelian & Pemasangan Fasilitas Kompresor Untuk Gas Musi Timur – Field
Pendopo
7 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
3.0 GENERAL REQUIREMENTS
3.1 Material
a) Bolt Connector :
b) Concrete :
● Concrete, 28 days cylinder compressive strength : 250 kg/cm2
● Cement for upper ground portion : ASTM C150 Type I
● Cement for under ground portion : ASTM C150 Type II
c) Rebar Reinforcement :
● Deformed high yield steel bar : ASTM A615 Gr. 60 or equal
● Plain round steel bar : ASTM A615 Gr. 40 or equal
d) Piles
3.2 Unit Weight
Unit weight of major construction materials shall be as follows :
● Steel : 7850 kg/m3 (KS Brochure)
● Mortar : 2000 kg/m3
● Reinforcement Concrete : 2400 kg/m3 (SNI-03-2847-2002 Tata Cara Perencanaan
Struktur Beton untuk Bangunan Gedung)
● Plain Concrete : 2200 kg/m3 (SNI-03-2847-2002 Tata Cara Perencanaan
Struktur Beton untuk Bangunan Gedung)
● Soil : 1700 kg/m3 (Soil Test Investigation, BH1)
4.0 LOADING ANALYSIS
Diameter Spec d = mm
Bolts shall comply with ASTM A307 Grade A, JIS B1180 Class 4.6 with tensile minimum is 413 MPa.
2500
Unit weight other than above mentioned shall be as per "Pedoman Perencanan Pembebanan Untuk Rumah dan Gedung
1987".
Concrete piles shall comply with ACI 543-00 Design, Manufacture and Installation for Concrete Piles. Pre-stressed
concrete material with minimum 28 days compressive strength fc' : 500 kg/cm2
B
ID : 2500 mm
7210mm
10300 mm T/T
2500 mm 2500 mm
8 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
4.1 Load
Axial Load , Pp = kN
Horizontal Load , Hp = kN
Moment Load , Mp = kN-m
4.2 Temporary Load
Axial Load , Pt = kN
Horizontal Load , Ht = kN
Moment Load , Mt = kN-m
4.3 Load from Pile Cap (Each Support)
Bottom Pile Cap Top Pile Cap
Height , Hpc = mm Height , Hpd = mm
Length , Lpc = mm Length , Lpd = mm
Breadth , Bpc = mm Breadth , Bpd = mm
Weight = kN Weight = kN
mm KO Drum saddle
mm
mm
mm
Foundation
mm
KO Drum saddle Pedestal
1500
Wpc 144 37,8
Temporary load applied to structure comes from load during hydrotest and load caused by the effect of earthquake at area.
(each support)
175,59
Permanent load applied to structure comes from load during operation. (each support)
1500
327,26
1,35
2500
300
3500
1,22
600
4000
300
43,23
48,04
2500 mm
Wpd
600
4000
Load applied to this structure based on analysis by mechanical engineer on document number : GCMT-13-MS-DS-
011:KO Drum
3500
Pedestal
Foundation
2375 mm
450 mm
9 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
5.0 SOIL DATA PROPERTIES
Based on Geotechnical analysis report (GCMT-13-GE-GEO-001)
Unit weight of soil, g = 17 kN/m3
Soil cohessivity, cu = 32 kN/m2
Internal angle friction, j = 0 0
6.0 PILING DESIGN
6.1 Mini Pile Properties
Mini Pile Properties : Mini Pile = x
The pile will be at level to meter, and embedded into the pile cap 0,6 m depth,
so the length is meter. Level of pile decided by considered the data from SPT
6.2 Resume Allowable Capacity
Based on Geotechnical analysis report (GCMT-13-GE-GEO-001)
Temporary Condition
Compressive Capacity
Tension Capacity
Lateral Force Capacity
Displacement
6.3 Pile Group Plan
Number of piles needed due to permanent condition
Number of piles needed due to temporary condition
Then, use 4 units (each support) of pile, with the plan below :
(Each Support)
(Each Support)
0,709
507
250
-0,60 -18,0
17,40
250
n =
Symbol Unit Permanent Condition
Pa kN
d cm
Parameter
338
Ha kN
units
Ta kN 190
507,0001,004053925
Pa
Pp + Wpc + Wpd
Pt + Wpc + Wpd=
327,25534 + 144 + 37,8=
285
116
1,057356006=175,58633 + 144 + 37,8
338,000=
78
units
n =Pa
B
10 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
Check Pile Group Efficiency
Efficiency (Converse-Labare)
D = m
m = 2
n = 2
s = 1,5 m
θ = arctan (D/s)
= 9,46
Eg =
Pile Group Capacity
Compression Strength = Number of piles x capacity per piles x efficiency group
= 1815 kN > kN
Control pile safety due to moment and horizontal load
Permanent Load
Pp
n
Pp
n
89,3465825
Pmaks = +Mp . X
75
01500 500
< Pall ==357,39
4+
Mp . X
500
338,000 Ok
Pmin
0,25
89,49%
357,39
-
∑x2
2500
ok
=
40
00
=
25
00
75
0
43,233534x0
12,5
∑x2
Mini pile
Mini pile
nm
nmmnEg
.90
)1()1(1
B
Mini pile
Mini pile
11 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
Ok
Horizontal Load
Hp
n
Horizontal Load
Hp
n
7.0 PILE CAP REINFORCEMENT
a = mm
a1 = mm
b = mm
kN/m
kN/m
= kN/m
To find the maximum moment on the pile cap, used SAP 2000.
Moment of pile cap
qdl
93,50152571
3,50
= < 1.5 qa
37,80
3,5
qpc
Weight of Bottom Pile Cap
Pedestal Width
< qa
12,009
250
500
2500
=
48,037
=357,39
- = 89,3465825
Load from KO Drum
Pedestal Width
-190,021
=327,26
=
=
4= kN <
=
Weight of Top Pile Cap
144,00
4
36
=
=
10,8
qdl
qpd
kN
4 12,5
77,7 kN
kN Ok
H =
43,233534x0
4= Ok
>
=
1,3517116,5
Pall tens=
=
Pedestal Width
0,3379
H
<
=
qpd qpc
a1 a a a1 b
12 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
Max Mu- = kNm Max Mu
+ = kNm
Reinforcement Neccesity
fy = MPa B = mm
fc' = MPa L = mm
dia = mm cv = mm
Mu = kNm d = mm
=
ruse =
As = rmin B d = mm2
Ab = 0.25 p dia2 = mm2
As
Ab
spacing, s = mm
smax = 2 d D25 - 100 2 Layer
smax = mm
0,006713
fy
=
86,56
125
n = 8
=m
25
Rn =0.85 x 1000 x 550^2
86560000
f B d2
Mu
1000
=
0,00671347
= 18,823530.85 fc'
= 0,00313
500
3692,406
490,8739
fy
0,3366456
0,003500
86,56
400
24,06
rmin =
rmin =1.4
= 0,0035 rmin =
25
75
=
4000
550
𝑓𝑐
4. 𝑓𝑦
13 of 22 .
Document No. Rev. Contract No : EP37-M12LL0122D
GCMT-13-CIV-CN-016 B Job. No : 31-12008PO002
Civil Calculation Sheet for KO Drum Foundation
8.0 SKETCH
D25 - 100 D25 - 100
0,3 m
D25 - 100
Dia. = m0,25
17,4 m
0,6 m