Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...

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Table 8-7. Preparation and Supervision of CIPP Works Utility Preparation Supervision Thames Water Jetting Contractor self-certifies to own method statement Severn Trent Water Not known Contractor self-certifies to specification. Some audit by Severn Trent Water. Agglomeration de Chartres Jetting and root cutting Third party project manager Agglomeration des Hauts-de-Bièvre Jetting and joint sealing Contractor self-certifies under own QA scheme Göttingen Stadtentwässerung Jetting Third party consulting engineer Technische Betriebe der Stadt Jetting Third party consulting engineer Leverkusen and Leverkusen Public Utilities Board Singapore Jetting and joint sealing PUB supervisor Queensland Urban Utilities Not known Contractor self-certifies under own QA scheme Sydney Water Jetting, joint sealing, and rebar trimming Sydney Water supervisor The utilities commented that the curing and cooling cycle is the element of the process that requires closest supervision and monitoring. This is because contractors try to save time in this stage, and this can result in inadequate curing, leading to problems of service life. 8.5 Verification and Testing Table 8-8 shows the required frequency of post-installation CCTV surveys, as well as those utilities utilizing an I/I test for in-situ performance testing. The performance test is generally an in-situ watertightness test to look for exfiltration. However, only two utilities appear to have established a clear pass/fail criterion for this characteristic. Table 8-9 sets out the mechanical characteristics of the installation that are tested. Most, but not all of the utilities, take samples from the installed liners for testing to verify that the installation meets the specification requirements. Table 8-8. Post-Works Inspection and In-Situ Testing Utility CCTV Survey I/I Test Pass/Fail Criterion Thames Water � Own test � Severn Trent Water - - - Agglomeration de Chartres � & after 1 year - - Agglomeration des Hauts-de-Bièvre � � - Göttingen Stadtentwässerung - - - Technische Betriebe der Stadt Leverkusen � & after 4 years - - Public Utilities Board Singapore � & after 2 and 5 years � - Queensland Urban Utilities � Pressure test � Sydney Water � & after 1 year - - 112
113 Table 8-9. Process Verification Testing Undertaken Third party Flexural Flexural Tensile Tensile Utility Laboratory Strength Modulus Strength Modulus Watertightness Hardness (4) Thickness Thames Water � � � - - - - � Severn Trent Water (1) - - - - - - - - Agglomeration de Chartres (2) - - - - - - - - Agglomeration des Hauts-de- Bièvre � - � - - - - � Göttingen Stadtentwässerung � - � - � - - � Technische Betriebe der Stadt � � - - � � - � Leverkusen (3) Public Utilities Board Singapore � � � � � - � � Queensland Urban Utilities � - - - � � - � Sydney Water (1) No information on Severn Trent � � - � � - � � (2) Chartres does not undertake process verification, but is considering adding it to the specification. (3) Leverkusen also has creep resistance measured. (4) Public Utilities Board Singapore uses Barcol, Sydney Water uses Shore method.
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EPA/600/R-12/004 | January 2012 | w
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DISCLAIMER The work reported in thi
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ACKNOWLEDGMENTS This report has bee
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samples had a flexural modulus valu
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CONTENTS DISCLAIMER ...............
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4.3.10.2 Upstream Sample ..........
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9.2.2 Recommendations for Developme
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Figure 5-27. Raman Spectra for the
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ABBREVIATIONS AND ACRONYMS AMP Asse
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1.0: INTRODUCTION This report forms
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1.2 Organization of the Report Foll
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Some sections of a sewer system may
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• The depth of the pipe below the
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Figure 2-3 highlights the main diff
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The most commonly used resins are i
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the glass fiber. The tube, which is
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3.0: DEVELOPMENT OF CIPP EVALUATION
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• The municipality would be willi
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• Measurements and/or physical sa
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Table 3-3. Laboratory Evaluation an
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4.1 Introduction 4.0: CITY OF DENVE
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Figure 4-1. Images of the Recovered
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Sample ID Figure 4-4. Soil Grain Si
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Location Table 4-5. Denver 8-in. Li
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Profile Plot Red - Steel tube Green
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Table 4-7. Results from Flexural Te
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35 Table 4-9. Comparison of Test Da
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4.2.12 Buckling Test. A steel mecha
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Figure 4-18. Pressure Gage and Pres
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4.2.13 Shore D Hardness. Durometer
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Figure 4-24. Barcol Hardness Readin
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increases and the heat of cure decr
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In summary, CCTV inspection of thre
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Figure 4-28. Thickness for Denver 4
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4.3.6.2 Downstream Sample. Seven sp
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Figure 4-34. Flexural Stress-Strain
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Table 4-18. Flexural Test Results f
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4.3.8.2 Upstream Sample. Specimens
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4.3.10 Barcol Hardness 4.3.10.1 Dow
Page 79 and 80: 4.3.11.2 Downstream Sample. The Ram
Page 81 and 82: 5.1 Introduction 5.0: CITY OF COLUM
Page 83 and 84: April 16, 2010 The specimen was rec
Page 85 and 86: The resulting gradation curves are
Page 87 and 88: Table 5-4. Soil pH at Designated Lo
Page 89 and 90: Figure 5-8. Average Thickness at Di
Page 91 and 92: 5.2.12 Flexural Testing. Specimens
Page 93 and 94: Figure 5-14. Flexural Stress-Strain
Page 95 and 96: Figure 5-16. Tensile Stress-Strain
Page 97 and 98: 5.2.15 Buckling Test. A mechanical
Page 99 and 100: Figure 5-24. Localized Leak on the
Page 101 and 102: Figure 5-26. Barcol Hardness Readin
Page 103 and 104: 5.3.3 Visual Inspection of Liner. I
Page 105 and 106: Figure 5-32. Ultrasonic Testing for
Page 107 and 108: Table 5-13. Geometric Data for Flex
Page 109 and 110: Figure 5-38. Shore D Hardness of Co
Page 111 and 112: 6.1 Introduction 6.0: REVIEW AND CO
Page 113 and 114: Overall, the liners appear to be ho
Page 115 and 116: age difference between the liners i
Page 117 and 118: Looking for correlations to the low
Page 119 and 120: A significantly lower range of Shor
Page 121 and 122: 7.0: RECOMMENDED TEST PROTOCOL FOR
Page 123 and 124: combining this broadly available in
Page 125 and 126: Table 7-3. Overall Structure for a
Page 127 and 128: Table 8-2. CIPP and Other Rehabilit
Page 129: Table 8-5. Rehabilitation Specifica
Page 133 and 134: Göttingen Stadtentwässerung: Göt
Page 135 and 136: experience and quality, and do not
Page 137 and 138: km of pipe and 50-year-old pipes ar
Page 139 and 140: methods are detailed in the Guide t
Page 141 and 142: The business of pipeline rehabilita
Page 143 and 144: • Destructive testing (but will n
Page 145 and 146: In Denver, in CCTV inspections of n
Page 147 and 148: 9.2 Recommendations for Future Work
Page 149 and 150: Falter, B. 1996. “Structural Anal
Page 151 and 152: Lehmann, M.A, J.P. Schroeder and C.
Page 153 and 154: APPENDIX A LIST OF TEST STANDARDS R
Page 155 and 156: The following table lists the non-A
Page 157 and 158: B.1 Introduction This study was con
Page 159 and 160: Mean thickness values for each cont
Page 161 and 162: APPENDIX C INTERNATIONAL STUDY INTE
Page 163 and 164: The original Insituform liner insta
Page 165 and 166: However, the figures published by O
Page 167 and 168: exfiltration and infiltration. Any
Page 169 and 170: STW uses CIPP for virtually all of
Page 171 and 172: method. Top hat repairs to junction
Page 173 and 174: All design and construction supervi
Page 175 and 176: Process verification test samples a
Page 177 and 178: consultant born out of the corporat
Page 179 and 180: BW continues to use CIPP, mainly in
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East, but has not yet had marked su
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