SRPE AASHTO Specifications - concretepipe.org

SRPE AASHTO Specifications

July 19 2013July 19, 2013

www.concrete-pipe.org

2Steel Ribbed HDPE= SRHDPE S

= SRPENow has AASHTO Design and ConstructionNow has AASHTO Design and Construction

Specifications for SRPE….

But wait there is more…

AASHTO Bridge Design Specs - Section 12• SRPE AASHTO MP 20-11 • Fiberglass Pipe ASTM D3262• Corrugated PP AASHTO MP 21


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5SRPE Marketing

6SRPE Marketing


7SRPE MarketingMetalMetal

+PlasticPlastic

= Strength and Durability“Finally a drainage product that isFinally a drainage product that is engineered for service and long life!”

Two dissimilar materials utilized in a composite pipe structure will interact p p pwith each other once in an installed condition – what will happen???


8SRPE Questions

Is Local Buckling Equation Applicable?pp

www.concrete-pipe.orgwww.concrete-pipe.org

9SRPE Questions

What about the steel?

f

Compressive Stresses - Yes

Bending Stresses - No


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Design ConsiderationsL l b kli ti h ld b• Local buckling equation should be verified for metal constrained by polyethylenepolyethylene

• Global buckling equation should be verified for a non uniformverified for a non-uniform steel/polyethylene profileBending stresses should be• Bending stresses should be considered


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Design IssuesC l l ti h ld b i d b• Calculations should be reviewed by Engineer to determine that appropriate allowable steel stressesappropriate allowable steel stresses were used.

• Fatigue may need to be considered if• Fatigue may need to be considered if under a shallow installation using really high allowable stress levelsreally high allowable stress levels.


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Stress in PolyethyleneStress in Polyethylene


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AASHTO Bridge Design Section 12 12.7.2.1 – Section Properties

Dimensions and properties of pipe cross-sections; minimum seam strength; mechanical and chemical requirements for aluminum corrugated and steel corrugated pipe and pipe-arch sections; and aluminum and steel corrugated structural plate pipe, pipe-arch, and arch sections, may be taken as given in Appendix A12. Dimensions, properties of pipe cross-sections, and material properties for steel-reinforced thermoplastic culverts shall be provided by the pipe manufacturer.(emphasis added)


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AASHTO Bridge Design Section 12 C12.7.2.1 - commentary

Steel-reinforced thermoplastic culverts are pipe sections in which the main load-carrying members are steel ribs encapsulated by thermoplastic material that may brace the ribs from distortion and buckling. This composite system should be evaluated independently for each manufacturer’s pipe system. Designers should obtain the required mechanical properties directly from the pipe manufacturer to determine fill heights. g(emphasis added)


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AASHTO Bridge Design Section 12


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AASHTO Bridge Design Section 12 C12.7.2.7 - commentary

While the steel ribs are the main load carrying member of the culvert, the thermoplastic profile braces the steel ribs from distortion or buckling under load is critical to the pipe performance. The liner also serves to distribute the load between ribs. A structural evaluation of the profile alone is not required. However, an evaluation of the composite system of thermoplastic liner and steel rib is necessary. It is important to assure that the tensile strains within the profile do not exceed the long-term strain capacity for the thermoplastic material used in the construction of the pipe.p p(emphasis added)


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AASHTO Bridge Construction Specs

26.1.1 DescriptionThis work shall consist of furnishing, gfabricating, installing, and inspecting metal pipe, structural plate metal pipe, arches pipe arches box structures andarches, pipe arches, box structures, and deep corrugated structures, and steel-reinforced thermoplastic pipe in conformance with these Specifications and the details shown in the contract documentsdocuments.


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26.3.8.1 GeneralBackfill for metal and steel-reinforcedBackfill for metal and steel reinforced thermoplastic culverts shall be granular material, as specified in the contract d t d ifi ti d h lldocuments and specifications, and shall be free of organic material, rock fragments larger than 3.0 in. (1.5 in. forfragments larger than 3.0 in. (1.5 in. for steel reinforced thermoplastic pipe) in the greatest dimension, and frozen lumps,

d h ll h i t t t ithiand shall have a moisture content within the limits required for compaction.


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26.3.9—Steel-Reinforced Thermoplastic CulvertsSteel-reinforced thermoplastic culverts shall conform to the requirements of AASHTO MP 20.(emphasis added)

AASHTO MP 20-11 has been approved for 12”-60”


20AASHTO Section 26 Metal - Joints

26.4.2.5—Steel Reinforced Thermoplastic Culvert JointsJoints for steel reinforced thermoplastic pipe shall comply with the details shown in the contract drawings and on the approved working drawings. Each joint shall be sealed to prevent infiltration of soil (soiltight), fines (silttight), or water (watertight) as required by the contract documents. Field tests may be required by the Engineer whenever there is a question regarding compliance with the contract requirements.Joints shall be installed so that the connection of pipe sections will form a continuous surface free from irregularities in the flow linefrom irregularities in the flow line.(emphasis added)


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C26 4 2 5 t

AASHTO Section 26 Metal - JointsC26.4.2.5 - commentary

Joint types include bands, bell-and-spigot pipe ends, double-bell couplings, and fusion welded joints. Joints may or may not require gaskets. Other joint types may be used provided that documentation is provided to demonstrate that pthe joint meets the project requirements.Joints are often provided as soiltight or watertight Definitions of soiltight and silttightwatertight. Definitions of soiltight and silttight are vague. Examples can be found elsewhere in this Section. Watertight joints are normally specified to meet ASTM D3212 Pressurespecified to meet ASTM D3212. Pressure capability of joint shall be based on project requirements. Commonly available pressure capabilities are 2 5 and 10 psicapabilities are 2, 5, and 10 psi.

(emphasis added)


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SRPE Marketing Material“Achieves a water tight joint performance that sets it apart fromperformance that sets it apart from conventional pipe products.”Tested to 15 psi, the steel reinforcedTested to 15 psi, the steel reinforced High Performance (HP) joints greatly exceed ASTM’s 10.8 psi requirement. p qFor lower performance applications, 3 psi low head (LH) or soil tight (ST) j i t il bl L k fjoints are available. Leak-free ElectroFusion (EF) joints are also an optionoption.


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SRPE Specification SheetSRPE Specification Sheet

Soil Tight Joints (30” – 96”) shall be plain ended SRPE pipe with Al i i d T 2 ( ti lAluminized Type 2 (or optional Polymeric coated) CMP coupling bands and elastomeric gasketsbands and elastomeric gaskets.


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SRPE Specification SheetSRPE Specification SheetLow Head (LH) Joints (30” – 72”) h ll b k t d t t d hi hshall be gasketed, stress-rated high

density polyethylene bell and spigot joints that have been laboratoryjoints that have been laboratory tested to 3 psi when tested in accordance with ASTM D3212accordance with ASTM D3212.


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SRPE Specification SheetSRPE Specification SheetHigh Performance (HP) Joints (30” 72”) h ll b k t d b ll(30” – 72”) shall be gasketed, bell and spigot joints where both the bell and spigot are reinforced with steeland spigot are reinforced with steel that is fully encased in stress-rated high density polyethylene and thathigh density polyethylene and that have been laboratory tested to 15 psi when tested in accordance with pASTM D3212.


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SRPE Specification SheetElectroFusion (EF) Joints (36” –120”) shall utilize plain ended SRPE i ld d t th tili i l ipipe welded together utilizing exclusive

pressure testable ElectroFusion couplers The welded connectionscouplers. The welded connections provide a true in-field watertight system assured by the pressure testableassured by the pressure testable welded sleeves at each welded connection. The field installed ElectroFusion joints shall remain watertight with a “zero” leakage rate up t t t f 30 ito a test pressure of 30 psi.


27AASHTO Section 26 Metal


28AASHTO Section 26 Metal26.5.1 Continued

All pipe laying joining and

26.5.1 Continued

All pipe laying, joining, and backfilling shall be in accordance with the strictest of the followingwith the strictest of the following requirements: the Manufacturer’s instructions, the contract ,documents, or these Specifications.


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SRPE Specification SheetInstallationInstallation shall be in accordance with ASTM D2321 “Practice for Underground Installation of Th l ti Pi f S dThermoplastic Pipe for Sewers and Other Gravity-Flow Applications” along with product specificalong with product-specific recommendations contained in manufacturers Installationmanufacturers Installation Guidelines.


30AASHTO Section 26 Metal


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32Trench Width


33Trench WidthPi O t id ASTM AASHTO AASHTOPipe

DiameterOutside

DiameterASTM 2321

AASHTOSec. 30

AASHTOSec. 26

30 30.9 50.6 58.4 NA*36 37 1 58 4 67 7 NA*36 37.1 58.4 67.7 NA*42 43.2 66.0 76.8 NA*48 49.5 73.9 86.3 NA*54 55.5 81.4 95.3 NA*60 61.4 88.8 104.1 NA*66 67 8 96 8 113 7 NA*66 67.8 96.8 113.7 NA72 73.7 104.1 122.6 NA*84 85.9 119.4 140.9 NA*96 97.8 134.3 158.7 NA*

*For trench conditions, the trench shall be excavated to the width, depth, and grade shown in the contract documents


and grade shown in the contract documents.

34AASHTO Section 26 Inspection Requirements

26.5.7.1 – Visual Inspection

Inspection Requirements

pFinal internal inspections shall be conducted on all buried installations to evaluate issues that may affect long-term performance Final inspectionsaffect long term performance. Final inspections shall be conducted no sooner than 30 days after completion of installation and final fill.

(emphasis added)(emphasis added)



26.5.7.1 - Visual Inspection


pSteel reinforced thermoplastic pipe shall be inspected prior to backfilling to ensure that the external reinforcing ribs do not lean anexternal reinforcing ribs do not lean an average of more than 15 degrees off of vertical within any 24.0 in. long continuous section of the pipe If this condition exists thatsection of the pipe. If this condition exists, that portion of the pipe shall be remediated or replaced. Joint types include bands, bell-and-spigot pipe ends double-bell couplings andspigot pipe ends, double bell couplings, and fusion welded joints.

(emphasis added)



26.5.7.2.2 – Installation Deflection for Steel-


Reinforced Thermoplastic CulvertsThe pipe shall be evaluated to determine whether the internal diameter of the barrel has beenthe internal diameter of the barrel has been reduced more than five percent when measured not less than 30 days following completion of installationinstallation.





Reinforced Thermoplastic CulvertsPipes shall be checked for deflection using a mandrel or any other device approved by themandrel or any other device approved by the Engineer that can physically verify the dimensions of the pipe and that is not limited by poor lighting waterflow pipe length or otherpoor lighting, waterflow, pipe length, or other limiting conditions of the installed environment. Pipes larger than 24.0 in. may be entered and deflection levels measured directlydeflection levels measured directly.





Reinforced Thermoplastic CulvertsIn all pipe installations, at least ten percent of the total pipe footage on the project shall bethe total pipe footage on the project shall be randomly selected by the Engineer and inspected for deflection. Also, as determined by the 100 percent visual inspection in Articlethe 100 percent visual inspection in Article 26.5.7.1, all areas in which deflection can be visually detected shall be inspected for deflectiondeflection.



26.5.7.2.2 – Installation Deflection for Steel-Reinforced Thermoplastic Culverts


Where direct measurements are made, a measurement shall be taken once every 10.0 ft for the length of the pipe and a minimum of four measurements per pipe installation are requiredinstallation are required.If a mandrel is used for the deflection test, it shall be a nine- (or greater odd number) arm mandrel and shall be sized and inspected by the Engineer prior to testing. Asized and inspected by the Engineer prior to testing. A properly sized proving ring shall be used to check or test the mandrel for accuracy. The mandrel shall be pulled through the pipe by hand with a rope or cable. Where applicable p lle s ma be incorporated in the s stem toapplicable, pulleys may be incorporated in the system to change the direction of pull so that inspection personnel need not physically enter the pipe or manhole.



26.5.7.2.2 – Installation Deflection for Steel-Reinforced Thermoplastic Culverts


For locations where pipe deflection exceeds five percent of the inside diameter, an evaluation shall be conducted by the Contractor utilizing a Professional Engineer and submitted to the Engineer for review and approval, taking into consideration the severity of the deflection, structural integrity, environmental conditions, and the design service life of the pipe. Pipe remediation or replacement shall be required for locations where the evaluation finds that the deflection could be problematic. For locations where pipe deflection exceeds 7.5 percent of the inside pdiameter, remediation or replacement of the pipe is required.www.concrete-pipe.org

41SRPE Marketing

Was designed with a “smooth inner wall for outstanding hydraulics ”wall for outstanding hydraulics.

“Hi h fl t hi d ith“Higher flow rates are achieved with a smooth polyethylene water way thereby providing the engineer thethereby providing the engineer the design the option to reduce the pipeline diameter: Saving youpipeline diameter: Saving you money.”


42SRPE Pipe Dimensions


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SRPE Smooth Operator???SRPE Smooth Operator???

• SRPE does not provide an improved h d li ffi i h dhydraulic efficiency when compared to RCP. Laboratory tests have shown that just the opposite is true and RCPthat just the opposite is true and RCP has a slight edge in hydraulic efficientlyefficiently.

SRPE Manning’s n 0 012 0 014 SRPE Manning s n 0.012 - 0.014 SRPE Manning’s n 0.011 - 0.013


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46Wall Thickness

S f S f


SRPE Manufacture Specification 1-9-2012

47Wall ThicknessNominal Pipe Size

Min Waterway Wall Thickness

Man. Spec

Min Waterway Wall Thickness

ASTM F2562

i h i h i hinch inch inch30 .082 .05936 .082 .06742 .082 .07148 .130 .07154 .130 .07954 .130 .07960 .130 .07966 .220 .08772 220 08772 .220 .08784 .220 NA96 .220 .118

120 .220 .118


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Smooth Polyethylene Water Way?S oot o yet y e e ate ay


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• Manufactured in standard lengths of

SRPE Marketing• Manufactured in standard lengths of

14 or 22-feet with bell and spigot jointsjoints.

• Fewer joints = faster installationLi ht i ht il h dl d d• Light weight = easily handled and installed

• Remember D2321 and f t ' i t ll ti idmanufacturer's installation guide

6-8” lifts.


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Manufactured “with a pressure rated resin

SRPE StrengthManufactured with a pressure rated resin with predictable performance properties the engineer can depend on”

• Conventional HDPE evidence of slow crack growth (pipe cracking and delamination)C ti l HDPE h d• Conventional HDPE has creep and buckling issues

• SRPE has steel that will not creep and• SRPE has steel that will not creep and buckle

• SRPE uses pressure rated resins


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51SRHDPE WeaknessesIt’ t l ibb d b t it’ till HDPEIt’s steel ribbed, but it’s still HDPE


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L D2321• Learn D2321• Learn D3212• Keep up with manufacturer’s own

installation guide and spec sheet• Work the specs from the local angle


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Documents

SRPE AASHTO Specifications - concretepipe.org