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CENTRAL CICLO COMBINADO SAN ISIDRO COMPANIA ELECTRICA SAN ISIDRO CIVIL STRUCTURAL ,..AL,..TTLA TTnN" '"' '" "" ....... "'.... FOR
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~U'w.1i!T

DIESEL OIL TANK FOUNDATION

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CONTENT DESCRI PTlON FIGURE

REMARKS

PURCHASER

ORDER NO. ITEII NO.

DATE
IKJ

:11:

POlEK PlANT CONSTIUcmm DlPAI'l'JIBlft' cmr. BNGlNBllDNG SIC'l'ION

SANISlDRO

6.... 509474 6000

APPROVED BY
CBECIEDBY

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DESIGNED BY DRllfNBY ISSUED DATE DRAWING NO.

K.IKEBE I~ I11iBDA I.1l1IETADA

REVoNO.

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MITSUBISHI HEAVY INDUSTRIES, LTD. TAKASAGO MACHINERY WORKS

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INDEX
Description

DIESEL OIL TANK FOUNDATION

l.wBasis of design 1 j , General i.z- Soil Mechanics 13 Materials 1 4- Method of calculation 15- Loads 1 5 1"Loads Combinations 1 52- Loads used in the Program 1 6- References
w

3
4 5

2.- Equipment Loads

Concrete Foundation Design

r,-

1.. BASIS OF DESIGN -

1.. General 1

The foundation concrete,

to support the Diesel Oil Tank consist in a ring foundation

of reinforced of 0,6 of the

The section of ring foundation consist in a Tee shaped with pedestal dimensions wid~h and 0,5 m depth" The diameter

m width and 1 25 height , and footing of 23m centerline section is 16,654 rn.

1,,2 Soil Mechanics

Minimum contact area between footing and soil: 80%

Allowable settlements:
... _,_.... .

5 em. 1/500 rad

Allowable differential settlements:

"..•:.:_;,,-:,..:~2:~~~,",~AII()wable:bearing~pressur:es'for-shall()w~foundatiol1s:.~n~~:'::,~">~,_:~,?i:..ci.::::c '•
(J allow

.:::_::,.i__~-c-'~,::::::::~_

= 4,0 kg/cm
= 6,7

for toundations s 1,0 m deep 1,0 m deep 1,5 "

(J allow

kg/cm2 for foundations>

For earthquake and wind load combinations The soil spring constant K ::::4kg/cm
3

1.. Materials 3
Concrete: tc

= 210

Kgl cm2

(ACI 318·89 R.92 & ASTM C39)

Reinforcing Steel: A63· 42H (yield stress: 4200 Kg/cm2) (Nch 211)

c ,
1.. .. Method of calculation 4The structural analysis and steel reinforcement was done manually Crack

control calculations was done using an Excel Calculation sheet.

2
1.,5,.- Loads After an inspection of the loads, it was clear that wind load combinations did not have to be considered, since seismic loads were always larger and controlled the design. From preceding, the loads used are only: DL = LL = LL' = EL = Dead Load Live Load Live Load Reduced for Seismic case Seismic Load
that were analyzed are the following:

(
......
_ ..

1.,5,.1 ,,- The load combinations

_.

... .
,

.~::~~-'-~::::..c..~c:.:__ £oLthecstability:

.. f.the.foundation o

.. ystem!:.=:~'-~~==-.cc s

... _~.~ ..... ...--:.:- ... ..-~ ~.::::'-:=:::.. ~_;:.:.~i,:-:-.::::.:::._;;"=..:::...c...:::::::~:.:::.c.··

.~ ......•

a) DL + LL b) DL + LL + EL
For the design of reinforced concrete,

a) U = 1A (DL) + 1 .7 (LL) b) U = 0 75 (1 4 DL + 1 .7 LL.'+ 1 87 EL) c)U=O.9DL+ 143EL U: required strength

1,,5,,2 Loads ..

used in the program,

For Beams calculation Simple loads:

LOAD 1 DL LOAD 2 LL

Combinations foundations,

loads

to

check

stability

of

LOAD COMB 4 OL+LL LOAD COMB 5 DL +LL+EL

Combinations

loads

for

the

design

of

reinforcement steel,
LOAD COMB 6: 1 .4 OL + 1 7 LL LOAD COMB 7: 0.75(1.4 DL + 1.7 LL.' + 1.87 EL) LOAD COMB 8: 0.9 OL + 1 43 EL

(
. References="-

CB-16005 R-2 CB-16042 Memorandum

"General Criteria for Civil Works" "Soil Investigation Report" of Agreement N°7, Pehuenche S A, Nov 12, 1995
)

ETG -1 015 L1-79142 R-2 LO-61376 R-O L1-80874 R-O L4-66766-46 R-3 L4-66766·46-(a) CB-DOF001 CB-DOF002 R-O R-O R-3

"Especificaciones

Tecnicas Generales"

"General Arrangement of Equipment" "Piping Arrangement Around Fuel Oil Tank (1/2)" "Piping Arrangement Around Fuel Oil Tank (2/2)" "Foundation Outline of Fuel Oil Tank" "Foundation Loads", Tank: Fuel Oil "Foundation of Fuel Oil Tank (1/3)" "Foundation of Fuel Oil Tank (2/3)"

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DESIGN FOR SHEAR IN TENSSIONED MEMBERS 210 kg/em2 4200 kg/em2 0,85 0,85 Ve = 0,53 ( 1 -

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