blais spray applied pipe liners - ohio department of ... · objective of the calculations – liner...

Innovative Solutions

through Engineered Products

HydraTech Engineered Products, LLC

10448 Chester Road • Cincinnati, OH 45215

P 513-827-9169 • F 513-827-9171 • www.hydratechllc.com

Presented by Peter Blais, PE

OTEC 2017 – Spray Applied Pipe LinerSupplemental Specifications 833 Calculations for the Resin Based Liner

OTEC 2017 – Spray Applied Pipe Liner

Objective

• What is a resin based liner?

• When would you use Supplemental Specification 833?

• Better understand Supplemental Specification 833

• Calculations to determine thickness

• Advantages of a resin based systems

Conduit Renewal - Resin Based Lining

What is a resin based liner?

• A two component polymer based liner, non-permeable spray

applied system.

• 100% solids (Zero VOC)

• Snap cure ~ 5 seconds

• Applied from .02” to 2.0” Thick


External Repair

11Equipment/Footprint


External Repair

Spray Equipment


Application


• What is purpose of the Supplemental Specification 833?

Provides guidance for the process of conduit lining with spray

applied, factory blended cementitious, geopolymer or resin

based material. The term “host pipe” refers to the conduit being

renewed with the spray applied structural liner system.


When would you use Supplemental Specification 833?

• Fully deteriorated pipe

• Areas where excavation is prohibitive

• Hydraulic flow restrictions



Overview of what is involved with a ODOT culvert rehabilitation project per SS833.

• Provide calculations for liner thickness

• Methods of cleaning host pipe

• Bypass flow around host pipe

• Verify thickness during installation

• Video survey of host pipe before installation

• Health and safety plan

• Letter from manufacture that the contractor is an approved installer


Objective of the Calculations – Liner Thickness

How is that performed?

• Thickness is determined using the fully deteriorated appendixes gravity pipe designed for cured in place pipe (CIPP). American Society of Testing Materials (ASTM) F1216.


ASTM F1216

Basis of the calculations

• Linear Calculation design appendix is based on the free-

ring structural buckling theory

• Combination of two external pressures

• Hydrostatic pressure loads at the top of the pipe unless

conditions indicate higher

• Water table

• Earth and traffic loads

• Soil density of 120 lb/cf

• Live loading is HL-93 vehicle

• Height of ground cover


ASTM F1216

Basis of the calculations per SS 833• Thickness calculations requirements

• Minimal of 0.5 inch

• Thickness per equation X1.3

• OR Thickness calculation per X1.4

• Round up to 0.5 inch intervals

Conduit Renewal - Resin Based Lining

Property Test Method Requirement

Percent Elongation ASTM D 638 Max. 15%

Tensile Strength ASTM D 638 Min. 6,000 psi

Flexural Modulus ASTM D 790 Min. 250,000 psi

Variable Value Units

Ground Water Height At the top of the pipe unless site

conditions indicate higher

ft

Soil Density 120 minimum lb/cf

Soil Modulus of Reaction 2,000 maximum psi

Long Term Material Modulus 50% of short term material

modulus

psi

Factor of Safety 2.0 minimum n/a

Ovality 5 minimum percent

Live Loading HL-93 Vehicle psi

Thickness Largest value of the following:

0.5, thickness per equation X 1.3,

or thickness calculated by

equation X1.4; increase calculated

value to nearest 0.5 intervals

inches

Supplemental Specification 833


ASTM F-1216-09 Appendix X1

Equation X1.3

Equation X1.3 - Determine all external loads on pipe

Factor for ovality

Factor for safety

Input flexural modulus of liner

Extrapolate thickness from the liners moment of inertia


ASTM F-1216-09 Appendix X1

Equation X1.4

• Conservative “catch all” formula to calculate based

on pipe stiffness. The thickness is based on the

moment of inertia, flexural modulus and the inside

diameter of the liner. This calculation typically

governs over equation X1.3.

Equation X1.4


Example Calculation


Deterioration Condition : FULLY s L Flexural Modulus ( long term ): 250,000 psi

Pipe Service: GRAVITY Flexural Strength ( long term ): 9,584 psi

Inside Pipe Diameter: 60.00 inches s LT Tensile Modulus ( long term ): 160,000 psi

Depth to Invert: 15.00 feet Tensile Strength ( long term ): 5,900 psi

Internal Pressure: 0.00 psi Minimum Diameter ( Host Pipe): 57.00 inches

Water Table Below Grade: 10.00 feet Maximum Diameter ( Host Pipe): 63.00 inches

q Ovality: 5.00 % C Ovality Reduction Factor: 0.64

Soil Density: 120.00 lb/ft3 H w Water Height (above top of pipe): 0 feet

E 's Soil Modulus: 1500 psi R w Water Bouyancy Factor: 1.00

Live Load: 1.25 B' Coefficient of Elastic Support: 0.324

Other Load: 0 S p Soil Pressure (Above Pipe) 8.33 psi

Vacuum Condition: 0 W p Water Pressure (Above Pipe): 0.00 psi

Maximum Hole Size: 1 inches Live Load Pressure: 1.25 psi

Other Load Pressure: 0.00 psi

Flexural Modulus (short term): 250,000 psi V p Vacuum Pressure: 0 psi

Flexural Strength (short term): 9,584 psi

Tensile Modulus (short term): 160,000 psi q t Actual External Pressure on Liner: 9.58 psi

Tensile Strength (short term): 5,900 psi P Ground Water Pressure ( W p + V p ) : 0.00 psi

Long-Term Retention: 100 %

N Safety Factor: 2

K Enhancement factor: 7

v Poisson's Ratio: 0.3

Coating Parameters

Existing Pipe Parameters/Conditions Calculated Data

Example Calculation


ASTM F1216-09 Appendix X1 Equations for Establishing Minimum Thickness

in Gravity Pipe ( Equations X1.1 thru X1.4)

Partial Deteriorated Pipe SDR t ( in.) t ( mm) t min (in.)

Eq (X1.1): Hydraulic Loads due to Groundwater

P=Actual Groundwater Pressure ( W p +V p )

Eq (X1.2): Minimum Thickness if Pipe is Oval

Fully Deteriorated Pipe

Eq (X1.3): Minimum Thickness to Support Hydraulic, soil & live loads

I = t 3 /12 ; SDR=D/(( 12*(I ))^.333)

Eq (X1.4): Minimum Thickness

EI /D3 = E / 12(SDR)

3

0.195

0.99

82.6 0.726 18.452

60.48 0.992 25.197

7797.4 0.008

0.056 1.421072.5( ) ( ) N

C

DRv

KEP

L .

1

1 .

1

2

32−−

=

DRDRPN

L

1001 5.0 -

2

1001 5.1

∆+

∆+

100

∆=

σ

2/1

3

L

.

EC.''32

N

1

=

D

IEBRq swr

093.0 3

≥D

EI


Resin liners versus Cementitious/Geopolymer per SS833

• Flexural modulus is the key design factor in resin based linings. Typical

of liners of plastic.

• Cementitious liners are not calculated in this manner, since the flexural

modulus of elasticity is low while the modulus of elasticity in compression

is high.

• Corrugated metal pipe is a “flexible” conduit, therefore resin based

systems have a high degree of elongation versus cementitious to

accommodate movement.

• Resin based liners have a minimal of 0.5 inch. Cementitious have a

minimal of 1.5 inch.


What projects are best with a resin based liner based on SS 833?

• Corrugated metal pipe

• Round piping*

• Most economical for diameters from 42” to 72”

*Note: Arches or flat bottom pipe cannot be utilized with linear calculations


ODOT 12 Project 130617 - PID 95137

Fully deteriorated condition

72” RCP pipe

Structural

Resin based lining

Case Study


Project layout

Interstate 480 Mile Marker 20

Access manhole on west bound lane of highway

Case Study


Initial inspection

Deterioration of the concrete (spalling)

Minor water infiltration (must be eliminated before applying liner)

Case Study


Application of the resin based lining

Remote operation

Rotating guns applied the resin process

Applied at 75-100 mils per pass.

Case Study


Lining system is designed to withstand the live and static loads while maintaining ground stability.

Case Study


Summary

• Resin based linings are non-permeable and have a good relationship with flexible conduit.

• Supplemental specification 833 provides guidance for material requirements and liner thickness.

• Resin liners differ from cementitious liners in that ASTM F1216 calculations are required.

• Liner thicknesses are determined with linear calculations used only for circular pipe.

• Little to no restriction to inlet flow and hydraulic flow.

• Best utilized for diameters 42” - 72”

• Long term repair


10448 Chester Rd.

Cincinnati, OH 45215

(513)827-9169

www.hydratechllc.com

blais spray applied pipe liners - ohio department of ... · objective of the calculations – liner...

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