pdvsa am 211 prt

PDVSA N TITLE

REV. DATE DESCRIPTION PAG. REV. APPD. APPD.

APPD.BY DATEDATE

VOLUME 18II

PDVSA, 1983

AM211PRT STORAGE TANK FOUNDATIONS

FOR APPROVAL

Jos Gilarranz Antonio OrtizJUL.87 JUL.87

ENGINEERING SPECIFICATION

JUL.87

DEC.91 L.T.

J.S.

1

0

ADDED PDVSA JA221 (1.2) & A.1.2. 98

D.G.

J.G.

R.R.

A.O.

ENGINEERING DESIGN MANUAL

ESPECIALISTAS

APPD.BY

REVISION FECHAENGINEERING SPECIFICATION

STORAGE TANK FOUNDATIONS DEC.911

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.Men Principal Indice manual Indice volumen Indice norma

Index1 GENERAL 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Scope 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Related Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Regulatory Requirements 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 Testing Laboratory 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 References 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 Information Supplied by Contractor 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 Site Conditions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 PRODUCTS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Backfill and Fill Materials 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 Asphalt Paving 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 Asphalt Coating 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 Concrete and Reinforcement 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 EXECUTION 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Subgrade 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 Fill 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 Concrete Placement 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 Tolerances 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 Slopes and Drainage 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.7 Sumps 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.8 Asphalt Paving and Coating 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.9 Field Inspection and Tests 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.10 Adjustment and Cleaning 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. APPENDIX 1 DESIGN 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



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1 GENERAL1.1 Scope

This specification defines the minimum requeriments to be meet by designers,suppliers and civil contractors of storage tank foundations.The work comprises:Materials for storage tank foundations.Construction requirements.Design criteria and details (Appendix 1).

1.2 Related SpecificationsPDVSA A211 Concrete Materials and ConstructionPDVSA A213 Bonding and GroutingPDVSA AG211PRT Earth Dikes for Storage TanksPDVSA AI211 Site Clearence and General EarthworkPDVSA AK211 EarthworkExcavation and BackfillPDVSA JA221 Industrial Installation Antiseismic DesignPDVSA SD251 Site Data

1.3 Regulatory Requirements1.3.1 Comply with all applicable Venezuelan laws, standards, and regulations

COVENIN 1753 Estructuras de Concreto Armado para Edificios. Anlisis y Diseo.

COVENIN 1756 Edificaciones Antissmicas.

1.4 Testing LaboratoryContractor shall employ and pay for the services of an independent testinglaboratory approved by the Owners representative for all in place compactiontests.

1.5 ReferencesThe following references, including applicable addenda, shall form a part of thisspecification to the extent specified.

1.5.1 AASHTO, American Association of State Highway and Transportation OfficialsM 226 Standard Specification for Viscosity Graded Asphalt

Cement



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1.5.2 ASTM, American Society of Testing and Materials.C33 Standard Specification for Concrete Aggregates.D242 Standard Specification for Mineral Filler for Bituminous

specification for Coarse Aggregate for Bituminous PavingMixtures.

D698 Standard Test Methods for MoistureDensity Relations of Soilsand Soil Aggregate Mixtures using 5.5 lb (2.49 Kg) Rammer and12 in (305 mm) Drop.

D1073 Standard Specification for Fine Aggregate for Bituminous PavingMixtures.

D1557 Standard Test Methods for Moisture Density Relations of Soilsand Soil Aggregate Mixtures using 10 lb (4.54 Kg) Rammer and18 in (457 mm) Drop.

D1559 Standard Test Method for Resistance to Plastic Flow ofBituminous Mixtures Using Marshall Apparatus.

D2027 Standard Specification for Cutback Asphalt (Medium CuringType).

D2028 Standard Specification for Cutback Asphalt (Rapid Curing Type).1.6 Information Supplied by Contractor

Contractor shall submit testing laboratory reports to the Owners representativeto ensure compacted fill meets requirements of this specification.

1.7 Site Conditions1.7.1 See Specification Side Data, PDVSA SD251 for general physical conditions

at site.1.7.2 Geotechnical report including boring logs and test data to determine soil and

water conditions.

2 PRODUCTS2.1 Backfill and Fill Materials

Soil materials for backfill and fill shall be free of clay, rock, or gravel larger than50 mm in any dimension, debris, waste, and vegetable, other matter.

2.1.1 Select Fill Inorganic granular material compacted to 95% of maximum densityat optimum moisture content according to ASTM D1557.

2.1.2 Special Fill (Rock Ring Wall) Crushed stone or rock with size of 25 mm to 40mm maximum, no fines, conforming to ASTM C33. Deposit in 200 mm thickmaximum lifts and compact with a vibratory drum roller.



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2.1.3 Pad Sand or equivalent available local material compacted to a minimumdensity of 95% to a laboratory maximum dry density as determined by ASTMD1557.

2.2 Asphalt Paving2.2.1 Bitominous Materials Asphalt complying with requirement of AASHTO M226.

Contractor shall submit recommended material to Owner for approval beforeconstruction.

2.2.2 Mineral Aggregates Crushed stone, gravel, sharpedge natural sand, mineralfiller, or a combination of two or more of these materials. Aggregates shall meetthe requirements of the following specifications:Coarse Aggregates ASTM D692 a maximum aggregate size of 25 mm in anydirection.Fine Aggregates ASTM D1073.Mineral Filler Limestone or Dolomite dust and portland cement with 80%passing 0,075 mm sieve. (Sieve N 200) ASTM D242.

2.2.3 The total pavement thickness shall be a minimum of 50 mm.2.2.4 A mix specified by a local supplier will be considered if it has been shown to have

a satisfactory history or performance.2.2.5 Contractor shall submit the jobmix formula to the Owner approval before starting

work.

2.3 Asphalt CoatingAsphalt Coating Hot sprayed bituminous material with a minimum thickness toform a continuous seal.Hot applied bitominous cutback primer:Use MC30 per ASTM D2027 (temperate weather)MC250 per ASTM D2027 (hot climate)MC250 per ASTM D2028 (hot climate)Any Material Cover by COVENIN Specifications

2.4 Concrete and ReinforcementConcrete and reinforcement shall conform to PDVSA A211. Concrete have a28 day minimun compressive strength of 210 kg/cm2.

3 EXECUTION3.1 General

Owner design drawings show location and materials used for storage tankfoundations.



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3.2 SubgradeRemove topsoil and natural soils to the required depth. Before placing fill, checkthe surface for soft stops and water pockets, remove, and replace with approvedcompacted material.

3.3 FillPlace fill in maximum lifts of 200 mm and compact.

3.4 Concrete PlacementPlace concrete for anchor blocks, curbs, and ringwalls in accordance withspecification PDVSA A211. Grouting shall conform to specification PDVSAA213.

3.5 TolerancesInstall the surface immediately under the bottom plates so the variation in line ofthe surface does not exceed + 6 mm in 10 meters, and the variation in levelbetween any two points around the perimeter does not exceed + 12 mm, for tankswhose diameter exceed 20 meters.

3.6 Slopes and DrainageFor drainage, gradients, and slopes, see Owner design drawings.

3.7 SumpsProvide cutouts for drawoff sump in pad.

3.8 Asphalt Paving and Coating3.8.1 Install asphalt paving after testing tank.3.8.2 Protect anchor bolts below grade from corrosion.

3.9 Field Inspection and Tests3.9.1 Testing laboratory shall perform inspection and tests of densities and moisture

contents of fill layers and pad, as directed by the Owners representative.Samples will be taken at the bottom of each compacted layer.

3.9.2 Remove, replace, or rework fill sections failing to meet these specifications untilsatisfactory, at no extra cost to the Owner.

3.10 Adjustment and Cleaning3.10.1 Repair any damage to surrounding soil caused during erection and return to

original conditions after completion of foundations.



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3.10.2 Remove all debris from the site, as directed by the Owner representative atcontractor s expense.



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1.APPENDIX 1 DESIGN

1 GENERAL1.1 Scope

This appendix contains the design basis for the preparation of drawings and otherdocuments for storage tank foundations.

1.2 Related SpecificationsPDVSA A251 Concrete Below Grade Design.PDVSA JA221 EarthquakeProof Design for Industrial InstallationPDVSA SD251 Side Data.COVENIN 1756 Edificaciones Antissmicas.COVENIN 2003 Acciones de Vientos sobre las Construcciones.

1.3 References1.3.1 ACI American Concrete Institute.

318 Building Code Requirements for Reinforced Concrete andCommentary.

1.3.2 ICBO International Conference of Building Officials.UBC Uniform Building Code.

1.3.3 ANSI American National Standards Institute.A58.1 Minimum Design Loads for Buildings and Other Structures.

1.3.4 NFPA National Fire Protection Association.No 30 Flammable and Combustible Liquids Code.

1.3.5 API American Petroleum Institute.Std 650 Welded Steel Tank for Oil Storage.

1.4 Site ConditionsSee Specification PDVSA SD251 for general physical conditions at site.

2 DESIGN2.1 Loading Conditions

2.1.1 Live Load Weight of liquid for operating condition or for water test.



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2.1.2 Dead Load Weight of foundation mat, weight of tank including insulation andplatforms.

2.1.3 Wind Load See COVENIN 2003, complemented with ANSI A58.1.

2.1.4 Earthquake Load See COVENIN 1756, complemented with ANSI A58.1.

2.1.5 Uplift load for pressurized tanks.

2.2 Loading Combinations.2.2.1 Size ring walls so the pressure at the base of the ring wall is equal to the soil

pressure at the same elevation for the operational loading condition (see PDVSALSTC006, in 3.2).

2.2.2 Provide concrete ringwalls or rock ringwall with anchor blocks if required foranchoring against uplift loads, wind or earthquake loads.

2.3 Settlement2.3.1 Uniform and differential settlements are to be given in the Geotechnical Report.

Check these settlements with piping design to verify if they are acceptable. If not,provide special foundation.

2.3.2 Compensate for large settlements in design by any combination of the following:a. Raise the foundation level to the level required to compensate for initial

settlement during water test loading.b. Provide flexible connections.

c. Adjust elevations of piping connections.d. Connect piping after settlement occurred.

2.3.3 When using water test loading to achieve initial settlements such method shall bedescribed. Indicate the initial and final settlement on the design drawings.

3 DESIGN DETAILS

3.1 Dimensions3.1.1 Minimun height of bottom of tank above finished grade 300 mm.

3.1.2 Extend base a minimum of 900 mm beyond tank perimeter for OSBL* tanks onfill.



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3.2 Slopes (Horizontal: Vertical)3.2.1 Sand cushion 120:1 maximum.

3.2.2 Extended base Slope a minimum of 2% away from tank at top. 1,5:1 at sidewalls.

3.2.3 Rock ring walls 1,5:1 maximum.

3.2.4 Tank basin Slope a minimum of 1% away from tank.* OSBL: OUTSIDE BATTERY LIMIT.

Pgina PrincipalIndice del ManualIndice del Volumen

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