Michigan WEA Collect Mi higan WEA Collections ions Seminar Seminar October Octobe r 1, 20 1, 2009 09 New (an New (and d old) old) Stu Bowns Stu B ns Insp Inspec ecti tion on HYDROM HYD OMAX USA USA 859-512 859 512-7878 7878 Tec echn hnolog ologies ies
Mic ichigan higan WE WEA A Collections Collections Sem emina inar October ctober 1, 1, 2009 2009 • History History • Flow low Met Metering ring • Zoom Came Zoom Camera ras s (Manh (Manhole Insp ole Inspec ection tions) s) • Focu Fo cused sed El Elec ectro trode de Le Leak ak Lo Loca cation tion (FELL (FELL) • CCTV CCTV In Insp spection tion • La Late tera ral In l Inspe spect ction ion • Side Si de Scan Scan CCT CCTV • Larg La rge Diamete e Diameter r Pi Pipe pe Insp Inspec ection tion (Camera (Came ra/L /Lase aser/ r/Sona Sonar) r) • What’s Next
Mic ichigan higan WE WEA A Collections Collections Seminar eminar Octo ctober ber 1, 1, 200 2009 After we started sewer systems, the need for inspection and cleaning quickly arose. The beginning of sewer line inspection was not with CCTV, but rather a primitive test which was only really capable of finding infiltration or a failure of the so called inspection method. First holes used to access the collection systems were referred to as lamp holes. Only large enough to lower a lamp which was used to see if light would appear at the other end. Later years the candle was dragged from one manhole to another by floating a thin line, such as a fishing line downstream with the flow and then retrieving it at the downstream hole. The thread was used to allow the operator to later pull a sled or a wagon on which the candle was placed. It was felt that, if the candle would still be lit at the far end if there was not a problem with the line. If infiltration occurred, then it was thought that the candle would be extinguished. This of course also remained true if the candle went past a lateral with flow, or rolled over during the inspection also. At the end of the day, the operator would have a simple set of data which showed if a line passed or failed. A failure usually meant a re-inspection. If an actual failure did indeed occur the operator still had no idea where in the line the infiltration occurred. Lamp-hole Designs Source: The Designing, Construction, and Maintenance of Sewerage Systems, by H. Prescott Folwell, 1901 Source: www.sewerhistory.org
Mic ichigan higan WE WEA A Collections Collections Seminar eminar Octo ctober ber 1, 1, 200 2009 Source: www.sewerhistory.org
Mic ichigan higan WE WEA A Collections Collections Seminar eminar Octo ctober ber 1, 1, 200 2009
Mic ichigan higan WE WEA A Collections Collections Seminar eminar Octo ctober ber 1, 1, 200 2009
FL FLOW W METERI RING TECHNOLOGY TO CONSIDER • Primary Device – Flume – Weir – Venturi • Level (Depth) – Pressure transducer – Ultrasonic • Velocity – Doppler – Radar – Range gated doppler WHAT, WHY , HOW ACCURATE, HOW LONG, WHO IS USING INFO
FL FLOW W METERI RING
FLOW FL W METERI RING 24-inch Line 8-inch Line Flow Debris Flow Debris Depth Velocity Depth Flow Depth Velocity Depth Flow (in) (FPS) (in) (in) (FPS) (in) 4 2 0 Calculated 4.25 2 0 9% Low 3 2 0 Calculated 4 2.25 0 13% Low 3.25 2 0 11% Low 4 2 0.5 5% High 3 2.25 0 13% Low 3 2 0.5 8% High 16 2 0 Calculated 16.25 2 0 2% Low 6 2 0 Calculated 16 2.25 0 13% Low 6.25 2 0 4% Low 16 2 0.5 1% High 6 2.25 0 11% Low 6 2 0.5 3% High 22 2 0 Calculated 22.25 2 0 1% Low 22 2.25 0 9% Low 22 2 0.5 1% High Even with the accuracy of today’s equipment and the ability to look at real time data, site visits are necessary to insure accurate data.
ZOOM CAM CAMERAS RAS • Allows you to see up to 75 feet in 8” lines • Can see more than 100 feet in larger lines • Helps determine if cleaning is needed in association with Preventative Maintenance • Helps prioritize where more detailed inspection is necessary
FE FELL LL SYSTEM • Acceptance testing for new sanitary sewers • Identify pipe defects including potential sources of infiltration and exfiltration (driven by flow monitoring data)
CCT CCTV V INSPECT CTION
CCT CCTV V INSPECT CTION
CCTV CCT V INSPECT CTION •
CCT CCTV V INSPECT CTION
LATERAL LA RAL INSPECT CTIONS Lateral camera is attached to a Laterals comprise up to 50% of a mainline camera municipalities collection system Faulty laterals can be significant Mainline camera used to position sources of I/I smaller lateral camera Structural problems can lead to Lateral camera launched into the basement flooding and loss of service line service Mainlines can range from 8” to 48” Locate cause of backups to determine Probe used in laterals from 3” to 6” financial responsibility View up to 80 feet in the lateral Cross bores from other utilities
LA LATERAL RAL INSPECT CTIONS
SIDE DE SCAN CAN INSPECT CTION
SIDE DE SCAN CAN INSPECT CTION 12-inch, Re-enforced Concrete “Un - wrapped” Side Frontal view Scan Image • Frontal view identifies what appears to be a severely deteriorated joint in need of repair • The unwrapped side scan image identifies an intact joint with only superficial surface defects. No repairs needed!
SIDE DE SCAN CAN INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION THE PROBLEMS: • Illumination • Image clarity • Bypass pumping • Personnel safety • Data
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION ABOVE THE WATER SURFACE WITH LASER AND HIGH DEFINITION IMAGING • Laser identifies loss of pipe wall from corrosion • Laser calculates ovality • Laser calculates deflection versus design • HD Images BELOW THE WATER SURFACE WITH SONAR • Sonar determines lost capacity by calculating debris levels and volumes • Major structural anomalies
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION Sonar of a 30-inch line 9 inches of silt
LARGE DI LAR DIAM AMETER P R PIPE INSPECT CTION 42” 32” Below the water line in a Typical brick sewer characteristics of shows the an egg shaped resolution that brick sewer. is achievable Less mortar loss with sonar. near the water level, getting worse towards the invert. Each brick face can easily be seen and the mortar loss between each brick can be measured.
LARGE DI LAR DIAM AMETER P R PIPE INSPECT CTION The invert condition can be seen using sonar under the cctv camera.
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION Enables inspection with minimum lighting requirements Measurement of the exact shape of the conduit Locate and measure the magnitude & location of deformations Identification of connection location and position
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION • HD Image, Laser and Sonar data continuously collected • Sewers >30 inches in diameter • Bypass pumping is not needed • Capable of performing continuous inspections for more than a mile • Easy to interpret data
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION • Laser data collected 12x per second • Sonar readings taken 1x per second • HD Images captured 6x per second
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
LAR LARGE DI DIAM AMETER P R PIPE INSPECT CTION
WHAT’S NEXT A SENSOR THAT CAN IMAGE OUTSIDE THE PIPE WALL TO IDENTIFY VOIDS AND PIPE THICKNESS
Mic ichigan higan WE WEA A Collections Collections Sem emina inar October ctober 1, 1, 2009 2009 • There are numerous technologies used to investigate the collection system • No one tool identifies all the problems • New and emerging technologies are available to provide better data THANK YOU – QUESTIONS? Stu.Bowns@HydromaxUSA.COM
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