SRPE AASHTO Specifications July 19 2013 July 19, 2013 - - PDF document

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SRPE AASHTO Specifications July 19 2013 July 19, 2013 - - PDF document

Oct 15, 2022 167 likes •708 views

SRPE AASHTO Specifications July 19 2013 July 19, 2013 www.concrete-pipe.org Steel Ribbed HDPE 2 = SRHDPE S = SRPE Now has AASHTO Design and Construction Now has AASHTO Design and Construction Specifications for SRPE. But wait there

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SRPE AASHTO Specifications

July 19 2013 July 19, 2013

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Steel Ribbed HDPE = SRHDPE S = SRPE

Now has AASHTO Design and Construction Now 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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g

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SRPE Marketing

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SRPE Marketing

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SRPE Marketing Metal Metal + Plastic Plastic = Strength and Durability “Finally a drainage product that is Finally a drainage product that is engineered for service and long life!” Two dissimilar materials utilized in a composite pipe structure will interact p p p with each other once in an installed condition – what will happen???

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SRPE Questions Is Local Buckling Equation Applicable? pp

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SRPE Questions What about the steel?

f Compressive Stresses - Yes Bending Stresses - No

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Design Considerations

L l b kli ti h ld b

  • Local buckling equation should be

verified for metal constrained by polyethylene polyethylene

  • Global buckling equation should be

verified for a non uniform verified for a non-uniform steel/polyethylene profile Bending stresses should be

  • Bending stresses should be

considered

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Design Issues

C l l ti h ld b i d b

  • Calculations should be reviewed by

Engineer to determine that appropriate allowable steel stresses appropriate 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 levels really high allowable stress levels.

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Stress in Polyethylene Stress 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

  • f 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 Description This work shall consist of furnishing, g fabricating, installing, and inspecting metal pipe, structural plate metal pipe, arches pipe arches box structures and arches, 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 documents documents.

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AASHTO Bridge Construction Specs 26.3.8.1 General

Backfill for metal and steel-reinforced Backfill for metal and steel reinforced thermoplastic culverts shall be granular material, as specified in the contract d t d ifi ti d h ll documents and specifications, and shall be free of organic material, rock fragments larger than 3.0 in. (1.5 in. for fragments 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 ithi and shall have a moisture content within the limits required for compaction.

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AASHTO Bridge Construction Specs

26.3.9—Steel-Reinforced Thermoplastic Culverts Steel-reinforced thermoplastic culverts shall conform to the requirements of AASHTO MP 20.

(emphasis added)

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

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AASHTO Section 26 Metal - Joints

26.4.2.5—Steel Reinforced Thermoplastic Culvert Joints Joints 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 line from irregularities in the flow line.

(emphasis added)

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C26 4 2 5 t

AASHTO Section 26 Metal - Joints

C26.4.2.5 - 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 p the joint meets the project requirements. Joints are often provided as soiltight or watertight Definitions of soiltight and silttight

  • watertight. Definitions of soiltight and silttight

are vague. Examples can be found elsewhere in this Section. Watertight joints are normally specified to meet ASTM D3212 Pressure specified to meet ASTM D3212. Pressure capability of joint shall be based on project

  • requirements. Commonly available pressure

capabilities are 2 5 and 10 psi capabilities 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 from performance that sets it apart from conventional pipe products.” Tested to 15 psi, the steel reinforced Tested to 15 psi, the steel reinforced High Performance (HP) joints greatly exceed ASTM’s 10.8 psi requirement. p q For lower performance applications, 3 psi low head (LH) or soil tight (ST) j i t il bl L k f joints are available. Leak-free ElectroFusion (EF) joints are also an

  • ption
  • ption.

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SRPE Specification Sheet SRPE Specification Sheet

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

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SRPE Specification Sheet SRPE Specification Sheet

Low Head (LH) Joints (30” – 72”) h ll b k t d t t d hi h shall be gasketed, stress-rated high density polyethylene bell and spigot joints that have been laboratory joints that have been laboratory tested to 3 psi when tested in accordance with ASTM D3212 accordance with ASTM D3212.

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SRPE Specification Sheet SRPE Specification Sheet

High 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 steel and spigot are reinforced with steel that is fully encased in stress-rated high density polyethylene and that high density polyethylene and that have been laboratory tested to 15 psi when tested in accordance with p ASTM D3212.

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SRPE Specification Sheet

ElectroFusion (EF) Joints (36” – 120”) shall utilize plain ended SRPE i ld d t th tili i l i pipe welded together utilizing exclusive pressure testable ElectroFusion couplers The welded connections

  • couplers. The welded connections

provide a true in-field watertight system assured by the pressure testable assured 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 i to a test pressure of 30 psi.

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AASHTO Section 26 Metal

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AASHTO Section 26 Metal 26.5.1 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 following with the strictest of the following requirements: the Manufacturer’s instructions, the contract , documents, or these Specifications.

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SRPE Specification Sheet

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

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AASHTO Section 26 Metal

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Trench Width

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Trench Width

Pi O t id ASTM AASHTO AASHTO Pipe Diameter Outside Diameter ASTM 2321 AASHTO

  • Sec. 30

AASHTO

  • Sec. 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 NA 72 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

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and grade shown in the contract documents.

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AASHTO Section 26 Inspection Requirements

26.5.7.1 – Visual Inspection

Inspection Requirements

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

(emphasis added) (emphasis added)

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AASHTO Section 26 Inspection Requirements

26.5.7.1 - Visual Inspection

Inspection Requirements

p Steel reinforced thermoplastic pipe shall be inspected prior to backfilling to ensure that the external reinforcing ribs do not lean an external 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 that section 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 and spigot pipe ends, double bell couplings, and fusion welded joints.

(emphasis added)

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AASHTO Section 26 Inspection Requirements

26.5.7.2.2 – Installation Deflection for Steel-

Inspection Requirements

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

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AASHTO Section 26 Inspection Requirements

26.5.7.2.2 – Installation Deflection for Steel-

Inspection Requirements

Reinforced Thermoplastic Culverts Pipes shall be checked for deflection using a mandrel or any other device approved by the mandrel 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 other poor 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 directly deflection levels measured directly.

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AASHTO Section 26 Inspection Requirements

26.5.7.2.2 – Installation Deflection for Steel-

Inspection Requirements

Reinforced Thermoplastic Culverts In all pipe installations, at least ten percent of the total pipe footage on the project shall be the 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 Article the 100 percent visual inspection in Article 26.5.7.1, all areas in which deflection can be visually detected shall be inspected for deflection deflection.

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AASHTO Section 26 Inspection Requirements

26.5.7.2.2 – Installation Deflection for Steel- Reinforced Thermoplastic Culverts

Inspection Requirements

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 required installation 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. A sized 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 to applicable, 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.

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AASHTO Section 26 Inspection Requirements

26.5.7.2.2 – Installation Deflection for Steel- Reinforced Thermoplastic Culverts

Inspection Requirements

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

  • r 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 p diameter, remediation or replacement of the pipe is required.

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SRPE 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 the thereby providing the engineer the design the option to reduce the pipeline diameter: Saving you pipeline diameter: Saving you money.”

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SRPE Pipe Dimensions

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

  • SRPE does not provide an improved

h d li ffi i h d hydraulic efficiency when compared to RCP. Laboratory tests have shown that just the opposite is true and RCP that just the opposite is true and RCP has a slight edge in hydraulic efficiently efficiently.

  • 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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Wall Thickness

S f S f

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SRPE Manufacture Specification 1-9-2012

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Wall Thickness

Nominal Pipe Size

Min Waterway Wall Thickness

  • Man. Spec

Min Waterway Wall Thickness ASTM F2562

i h i h i h inch inch inch 30 .082 .059 36 .082 .067 42 .082 .071 48 .130 .071 54 .130 .079 54 .130 .079 60 .130 .079 66 .220 .087 72 220 087 72 .220 .087 84 .220 NA 96 .220 .118 120 .220 .118

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Smooth Polyethylene Water Way? S

  • ot
  • 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 joints joints.

  • Fewer joints = faster installation

Li ht i ht il h dl d d

  • Light weight = easily handled and

installed

  • Remember D2321 and

f t ' i t ll ti id manufacturer's installation guide 6-8” lifts.

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Manufactured “with a pressure rated resin

SRPE Strength

Manufactured 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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p

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SRHDPE Weaknesses It’ t l ibb d b t it’ till HDPE It’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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????

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