Technical Guide Visual Inspection of Sewer Pipe. June 9, 2010 Canadian Standards Association Municipal Infrastructure Solutions Program

Transcription

1 Technical Guide Visual Inspection of Sewer Pipe June 9, 2010 Canadian Standards Association Municipal Infrastructure Solutions Program

2 Setting the Scene MISP - Municipal Infrastructure Support Program Provide a neutral third party to implement guide 2

3 Objective A Canadian A Canadian process that helps establish consistency across jurisdictions with respect to terminology and data formats for sewer defect and distress coding 3

4 Working Group / Facilitators G. Chartier - City of Saskatoon (Chair) K. Bainbridge - City of Hamilton (Vice-Chair) M. Blackshaw - AquaCoustic Remote Technologies Inc. D. Deveau - Ville de Montréal P. Liew - The City of Calgary Water Resources G. Linschoten - National Wastewater Benchmarking Initiative L. Petelka - Peel Region Public Works R. Robertshaw - NRTSI J. Rose Region of Peel R, Flannery-Guy - Aqua Data Inc. G.W. Simmonds City of Surrey M. Hausser - City of Cambridge T. Henry - City of Abbotsford R. Homeniuk - AECOM Ltd. I. Tardif CERIU R, Taylor - Mar-Tech Underground Services Ltd. D.J. Vanier - National Research Council Canada A.I. Murra - CSA Standards (Project Manager) K.K. Lewis - Liqui-Force Services Ontario Inc. 4

5 Guide Seven Components Introduction References & Terminology Visual Assessment Pipe Failure Modes Evaluation of Pipe Assessment Systems Recommended Best Practice for Visual Inspection Quality Assurance and Acceptance Protocol 5

6 Introduction Purpose of the of the guide Defect and distress coding definitions and nomenclature Quality control & assurance protocol Data transfer protocol Standard terminology Contributions NASSCO - PACP Scope Assessment of a wide variety of pipes via visual assessment Protocol for recording distresses and defects of pipes Identify and Quantify defects and distresses Future Work Defect and distress based deterioration models Operational planning triggers Lateral inspection protocol MH inspection protocol 6

7 References & Terminology References EN :2003 WRc MSCC 2 nd, 3 rd, 4 th Editions WSSA WSA Etc Glossary Abbreviations 7

8 Visual Assessment The Role of Visual Assessment in Decision Making Linkage to Asset Management The importance of information Background on Visual Assessment Description of Visual Assessment Types of Distresses and Defects Identification of severity and extent 8

9 Visual Assessment Progression of Severity & Extent of Distress Pristine Pipe Segment Low Extent Progression High Severity Progressions L o w Low severity low extent Minor maintenance Partial or no treatment Low failure risk Low severity & Moderate extent Minor routine reactive and preventive maintenance to correct localize defects Low failure risk Low severity & High extent Minor routine reactive and preventive maintenance to correct localized defects Low failure risk Moderate severity & low extent Major corrective maintenance Partial spot treatment Increased failure risk Moderate severity & Moderate extent Major Rehabilitation or Maintenance Full segment treatment Increased failure risk Moderate severity and moderate extent Major rehabilitation or maintenance Increased failure risk H i g h High Severity & Low extent Major corrective maintenance Partial spot treatment High localized failure risk High severity & Moderate extent Major rehabilitation or maintenance High failure risk High severity & High extent Major rehabilitation or maintenance Full segment treatment Failed Failed Pipe Segment 9

10 Pipe Failure Modes How Pipes Fail Stage I though Stage V Key Structural failure modes Key Operational failure modes Structural Distress & Defect Severity 10

11 Pipe Failure Modes Severity I n c r e a s e Pristine with or without minor defects. Defects that have not begun to deteriorate. Moderate defects that will continue to deteriorate. Description Pipe is at the beginning of life in new or near or new condition Pipe has progressed from near new condition and failure is unlikely in the distant future Pipe is at the middle of life and is unlikely to fail in the foreseeable future. Severe defects that will continue to deteriorate in the foreseeable future. Defects requiring immediate attention. Pipe is near the end of life and will fail in foreseeable future Pipe has failed or will fail in immediate future Severity Progression of Distress PACP Code Longitudinal fracture and deformation of pipe (LFD) I n c e a s e Pristine Longitudinal or spiral crack Longitudinal or spiral fracture Broken, deformed, or multiple cracks Collapsed N/A CL, CS FL, FS B, BSV, BVV, CM, FM XP, XB 11

12 Evaluation of Pipe Assessment Systems General Coding Formats Defect coding Comparison matrix MSCC 3 rd MSCC 4th PACP Australian European NRC CERIU New Zealand Recommendation Rationalization 12

13 Best Practice for Visual Inspection Overview Distress & Defect Coding Method Construction & Miscellaneous Features Data Exchange Protocol Video Recording Protocol 13

14 Quality Assurance & Acceptance Protocol Implementation Planning Review Process Use of codes Acceptance of Inspections Operator training and Qualification 14

15 Appendices Comparison of various coding systems Operational Construction Structural Miscellaneous Data Dictionary WRc 3 rd & 4 th to PACP translation table Quick Reference Guide 15

16 Contact Info Kevin Bainbridge, A.Sc.T. Senior Project Manager, Infrastructure City of Hamilton 16