san francisco sewer inspection methodology presentation · · 2016-11-05walking inspection (for...
TRANSCRIPT
![Page 1: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/1.jpg)
San Francisco Sewer Inspection Methodology Presentation
October 13, 2016
![Page 2: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/2.jpg)
“Traditional” Methodology
1. Pan & Tilt Camera 2. Panoramo 360 Camera (Est. Starting
2010) 3. Walking Inspection (For Larger
Structures)
![Page 3: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/3.jpg)
Pan & Tilt Camera (Sample)
![Page 4: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/4.jpg)
Pan & Tilt Video
![Page 5: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/5.jpg)
Panoramo 360 Camera (Sample)
![Page 6: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/6.jpg)
Panoramo 360 Inspection Video
![Page 7: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/7.jpg)
Pan & Tilt Camera
Advantage - More Sturdy Than Panoramo 360 Disadvantage - Inspection Limited to What Camera Points To
![Page 8: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/8.jpg)
Panoramo 360 Camera
Advantage - Reviewer Has Control During Video Review Disadvantages - Higher Sensitive To “Bumps” (Can Lead To Missed Images) - Poorer Maneuverability (Esp. Thru Curves and Obstructions) - Not As Good For Observing Certain Types of Infiltration
![Page 9: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/9.jpg)
Latest Equipment Acquisition: Electro Scan
(For Detection of “Leaks” in Sewer Due to Openings)
![Page 10: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/10.jpg)
Electro Scan Truck Model ES-620
(Photo taken from the website www.electroscan.com)
![Page 11: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/11.jpg)
Electro Scan Summary Schematic
![Page 12: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/12.jpg)
Electro Scan Demo
San Francisco, CA
September 15 & 16, 2015
![Page 13: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/13.jpg)
Demo Locations
![Page 14: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/14.jpg)
Site 1 – The Embarcadero & Brannan (East Side of Intersection By Brannan Outfall)
Sewers Inspected During Demo
![Page 15: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/15.jpg)
Site 1 (The Embarcadero & Brannan) – Upstream
![Page 16: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/16.jpg)
Site 1 (The Embarcadero & Brannan) – Downstream
![Page 17: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/17.jpg)
Electro Scan Demo Truck On Location
![Page 18: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/18.jpg)
Known Leaking Joint At 12-Inch Sewer
![Page 19: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/19.jpg)
Electro Scan Probe
![Page 20: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/20.jpg)
Cone For Directing Nozzle Spray
![Page 21: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/21.jpg)
Lowering Of Probe (Connected to Jetting Nozzle) Into Upstream MH
![Page 22: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/22.jpg)
Vactor Truck Setup at Downstream MH (For Jetting Nozzle To Pull Probe)
![Page 23: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/23.jpg)
Electro Scan Report (Page 1 For Segment 1)
![Page 24: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/24.jpg)
Electro Scan Report (Page 1 For Segment 2)
![Page 25: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/25.jpg)
Data Uploaded To Cloud Server
Assessed Via Critical Sewers
![Page 26: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/26.jpg)
Follow Up With CCTV To View Cause of Electro Scan Defects (If Necessary)
![Page 27: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/27.jpg)
Electro Scan Features Summary
• Can scan pipes up to 30” in diameter
• Probe emits 10 volts, 40 milliamps (Equivalent to 6 AA batteries)
• Assumes 1’ of head above pipe (for volume calculations)
• Can scan through grease and roots
• Can be used during wet weather
• No operator error
• Scans upload to cloud within minutes of completion
![Page 28: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/28.jpg)
Electro Scan “Defects” Definition
Defects
• Small 100-400 µA
• Medium 400-700 µA
• Large 700+ µA
Infiltration is the defect current x the defect length
![Page 29: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/29.jpg)
Electro Scan Used For TDML Locations:
1. Candlestick Point 2. Crissy Field 3. Aquatic Park Sewers sized 15 inches in diameter as less assigned
![Page 30: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/30.jpg)
Other Inspection Methodologies
1. Pole Cam
2. Sonar (By Contractor)
3. Laser (By Contractor)
![Page 31: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/31.jpg)
SFPUC “Repair vs. Replacement” Decision Process
![Page 32: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/32.jpg)
Decision Matrix Developed For Electro Scan Findings
SALTWATER INTRUSION SEWER REPAIR DECISION CHART
Last Revised September 23, 2016
REPAIR RECOMMENDATION
Brick SewersReplacement (per recent internal
proposal)
Manhole Manhole Point Repair
Non-Circular Sewers Manual Grouting
Significant "Grade 5" Defects (XP,
D, BSV, BVV, HSV, HVV, B or H (2
positions or more), FH4, FH3, CH4,
CH3)
Any Type of PipeRefer to "Repair Vs. Replacement
Decision Flowchart"
Break-In and Intuding LateralRefer to "Repair Vs. Replacement
Decision Flowchart"
Other Lateral Types Point Repair
Concrete Pipes > 24" Diameter
(Any Number of Defective Joints)Automated Grouting
Less Than 25 % of Joint On Block
DefectiveAutomated Grouting
Greater Than 25% of Joints On
Block DefectivePipe Lining
Less Than 25% of Block Having
DefectsSectional Point Repair
Greater Than 25% of Block Having
DefectsPipe Lining
Manhole Defects Any Type Causing Infiltration Manhole Point Repair
*Note: Prior to assigning repair, research should be performed as to whether sewer assets are on blocks
scheduled for projects such as paving, streetscahpe, or others which may result in additional
DEFECT TYPE / DESCRIPTION
Defect at Lateral
Defective Joint With No Other
Main Sewer Defect Involved
Other Main Sewer Defects
(Cracks, Fractures, Small Breaks
and Holes)
Any Type of defects
![Page 33: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/33.jpg)
Contractors Used By SFPUC Wastewater Enterprise
National Plant Services
Contact: Michelle Beason
Phone: 925-262-7366
E-Mail: [email protected]
Pipe and Plant Service
Contact: Bill Gilmartin
Phone: 888-978-8264
E-Mail: [email protected]
Professional Pipe Services (ProPipe)
Contact: Jason Walborn
Phone: 800-784-7473
E-Mail: [email protected]
![Page 34: San Francisco Sewer Inspection Methodology Presentation · · 2016-11-05Walking Inspection (For Larger Structures) Pan & Tilt Camera ... Sewers Inspected During Demo . Site 1](https://reader034.vdocuments.site/reader034/viewer/2022051509/5ae231367f8b9a495c8bc261/html5/thumbnails/34.jpg)
The End