Innovative Solutions through Engineered Products OTEC 2017 Spray Applied Pipe Liner Supplemental Specifications 833 Calculations for the Resin Based Liner Presented by Peter Blais, PE HydraTech Engineered Products, LLC 10448 Chester Road Cincinnati, OH 45215 P 513-827-9169 F 513-827-9171 www.hydratechllc.com
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 OTEC 2017 Spray Applied Pipe Liner
OTEC 2017 Spray Applied Pipe Liner Equipment/Footprint 11 External Repair
Spray Equipment OTEC 2017 Spray Applied Pipe Liner External Repair
Application OTEC 2017 Spray Applied Pipe Liner
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 freering 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
Supplemental Specification 833 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 ft conditions indicate higher Soil Density 120 minimum lb/cf Soil Modulus of Reaction 2,000 maximum psi Long Term Material Modulus 50% of short term material psi modulus 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
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 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.
Example Calculation Existing Pipe Parameters/Conditions Calculated Data 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/ft 3 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 Coating Parameters 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
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 2KE L 1 C P =.. 2 3 P=Actual Groundwater Pressure ( W p +V p ) ( 1 v ) ( DR 1) N 1072.5 0.056 1.42 Eq (X1.2): Minimum Thickness if Pipe is Oval σl DR = 1.5 1+ - 0.5 1 + DR PN 100 100 100 7797.4 0.008 0.195 Fully Deteriorated Pipe Eq (X1.3): Minimum Thickness to Support Hydraulic, soil & live loads 1 E L I q I = t 3 /12 ; SDR=D/(( 12*(I))^.333 r = 32 R w B ' E ' s..c 3 ) N D Eq (X1.4): Minimum Thickness EI EI/D 3 = E / 12(SDR) 3 0.093 3 D 1 / 2 82.6 0.726 18.452 60.48 0.992 25.197 0.99
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
Case Study 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.
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