Implementing Engineering Technologies for Underground ...
Transcript of Implementing Engineering Technologies for Underground ...
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Implementing Engineering Implementing Engineering Technologies for Underground Technologies for Underground Technologies for Underground Technologies for Underground
Infrastructure Asset ManagementInfrastructure Asset ManagementBy
Bryon Livingston, P.E.and
Rich Blackmun, P.E.
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Primary Goal: Avoid Catastrophic Events
www.epa.gov/earth1r6/6en/w/sso/sso.htm
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Condition of Existing Infrastructure
ASCE Wastewater Report Card:
2001 D2001 D
2005 D-
2009 D-
Aging wastewater systems discharge a
billion gallons of untreated sewage
each year into surface waters
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Condition of Existing Infrastructure
The Top Priorities identified include maintaining and rehabilitating aging wastewater
infrastructure, and a number of priorities associated with potential “catastrophic events”.
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Failure of Critical Pipelines Can Have Substantial Consequences…
l Impacts service to customers
l Often laid under major roads -Substantial traffic problems
l Potential danger to public health
l Potential damage to the environment
l Repair can be very costly
l Public perception of utility!!
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Lessons for Management – Pipes Wear Out
l PERFORMANCE – Key is knowledge of the wear out process and application of asset management principles
l RISKS – Pipe life is an unknown variable that must be assessed with renewal technologies to optimize program
l COSTS – Expenditures are needed to match replacement or rehabilitation. This will require full cost pricing in rates
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Are Utilities Spending Dollars on Critical Pipeline Infrastructure?
l Broadly held view that a crisis is required to motivate spending
l Competition for funding with l Competition for funding with visible, tangible, and immediate benefit projects
l Proactive management requires a sustainable program based on known pipe conditions
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Knowing Condition of Critical Pipelines is Key to the Process of Managing the System
l Life expectancy for a pipeline system is shorter than design life
l Corrosion in the system
l Construction/installation practices
l Transient pressures
l Performance is dependent on major trunk-line systems –critical pipelines
l Leads to a growing sense of urgency to define the condition of critical conveyance systems
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Various Technologies Exist for Condition Assessment of Pipelines
l Visual inspection
l Closed circuit TV
l Sewer Scanning Evaluation Technology (SSET)
Traditional Methods “New” Technologies
l Closed circuit TV
l Smoke testing
l Dye testing
l Flow monitoring
l Laser scanning
l Sonar scanning
l Electromagnetic (FELL41)
l Leak detection
l www.epa.gov/owm/mtb/epa-conveyance-report.pdf
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Closed Circuit TV
l Side scanning evaluation technology
l Pan & tilt optical zoom
l Push cameral Push camera
l Digital camera
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Sewer Scanning Evaluation Technology (SSET)
From Hydromax
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Advantages of Side Scan
12-inch, reinforced concrete
“Unwrapped” side scan image
Frontal view
•Frontal view identifies what appears to be a severely deteriorated joint in need of repair•The SSET unwrapped side scan image identifies an intact joint with only superficial surface defects. No repairs needed!
From Hydromax
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Digital Visual Sidewall Scanning
By Envirosight
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Side Scan Image Provides More Detail
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Advantages Over CCTVl Faster than conventional CCTV (70 fpm vs 30)l Digital storage more efficiently (16,000 ft on a single DVD)l No stopping or panning/tilting for defectsl Accurate and detailed annotationl Lower cost of ownershipl Consumes less digital capacity/bandwidth for archiving and sharing
From Envirosight
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Laser Scanning Inspection
Accurate inspection of large pipes
From Hydromax USA
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Benefits Of Laser Scanning
l Enables inspection with minimum lighting requirements
l Measurement of the exact l Measurement of the exact shape of the conduit
l Identification of connection location and position
l Measure cross sectional area and perimeter of conduit
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Typical Laser Results
From Hydromax USA
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Profiling SONAR
l Used in
l Submerged pipe
l Pressurized pipe
l Creates a cross-section of the pipe
Distance measurement viatime of flight
Pipe Sediment
SONAR sensor rotates 360 degrees
19
Creates a cross-section of the pipe
l Quantifies sediment deposition
l Quantifies pipe geometry
l 3D pipe model generation
l Advantages
l Low cost high volume pipe inspection with no bypassing costs
Pipe Sediment
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Sonar Profiler Inspection
Accurate inspection of large pipes with flow 1/3 to totally surcharged
From Hydromax USA
SCAN SHOWS BUILD UP OF GREASE
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Typical Sonar Results
From Hydromax USA
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Dist: 9”
Sonar Results of a 30-inch Line
9 inches 9 inches of Silt
From Hydromax USA
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Sonar & Laser Tractors
Hydromax USA
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Synchronized Data Collection
LASER DATA SYNC
Laser
Gas
CCTV
V-CCTV
LASER
SONAR
V-CCTV
GAS CCTV
DATA SYNC
Sonar IMU
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Focused Electrode Leak Locator (FELL41)
One step infiltration/exfiltration
detection using an in pipe electrode
From Hydromax USA
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Focused Electrode Leak Locator Applications
l Acceptance testing for new sanitary sewers of non-conducting pipe
l Can be used in dry weather conditions
l Sanitary Sewer Evaluation Surveys - Identify pipe defects l Sanitary Sewer Evaluation Surveys - Identify pipe defects including potential sources of infiltration (driven by flow monitoring data)
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Below-ground part of the operation within the dry-well of the pumping station.
In this case, the hydraulic winch is attached directly to it without the use
Sahara® Leak Detection
“Extending the lifetime of your pipeline”
attached directly to it without the use of an insertion fitting as the pipe could be de-pressurized for installation of the equipment.
The Sahara cable can be seen appearing from the chamber access hatch
Typical Force Main Application
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Sahara System Allows for Real Time Data Processing
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• PipeSpy transmits signal to Sensor Head
• Detectable through ALL pipe materials
• Depths to 35 foot range
PipeSpy Locates an Underground Leak and the Corresponding Location on the Surface
• Depths to 35 foot range
• Locates within 18-inches of linear alignment of pipeline
• Stakeout, mark out, and/or GPS coordinate exact leak location
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Complete the Condition Assessment: R3 = Right Pipe, Right Time, Right Material
l Over the Line Surveys – Soil corrosivity tests, remote visual inspections (SSET, Laser, Sonar or CCTV)
l Failure risk analysis
l Review existing pipeline data
l Develop plan, identify projects, cost estimates
l Prioritize based on known conditions
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Managing Infrastructure Requires a Process
Condition Assessment
•Inspection Planning•Field Inspections•Assignment of Ratings•InspectionDocumentation•System
Prioritization• Assumptions Form• Risk Mitigation / Simulation Ranking
• Weighted Matrix Scoring
Prioritization• Assumptions Form• Risk Mitigation / Simulation Ranking
• Weighted Matrix Scoring
ImplementationSchedules
Project Development
• Identify Capital and O&M Projects
• Prepare Project Descriptions
• Develop Capital, O&M, and Failure Costs
15,000
20,000
25,000
$000
Prioritization Rankings to Reflect •System
Supply/DemandAssessment
• Project Identification
• Develop Cost Assumptions
• Prioritization Process
• Risk Criteria Ratings
• PrioritizationResults
• TimingOptimization
• ImplementationSchedule
• Phased Work Plan Meets Budget
Key Results of Process
Costs
• Facilities Assessed
• Results Documented
0
5,000
10,000
2005 2006 2007 2008 2009 2010 2011 2012 2021
$000Rankings to Reflect
Level of RISK
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Basic Steps to Management of Critical Pipeline Infrastructure
Condition Assessment
Develop ProgramDevelop Program
Prioritize; Based on Risk Analysis
Implement Plan
R3 = Replace the Right Pipe, at the Right Time, with the Right Material
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Basic Steps to Management of Critical Pipeline Infrastructure
l Condition assessment
l Develop program
l Prioritize based on risk Prioritize based on risk analysis
l Implement plan
R3 = Replace the Right Pipe, at the Right Time, with the Right Material
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Questions?Questions?Conveyance & Buried Infrastructure PracticeBryon Livingston, P.E.Email: [email protected]
Address:8400 Ward ParkwayKansas City, MO 64114Phone: (913) 458-3368Fax: (913) 458-3519
Engineering ManagerRich BlackmunEmail: [email protected]
Address:4800 Meadows Road, Suite 200Lake Oswego, OR 97035Phone: (503) 699-7556Fax: (503) 697-3699