concrete sewer pipe Articles

  • Comparison of core sampling and visual inspection for assessment of concrete sewer pipe condition

    Sewer systems are costly to construct and even more costly to replace, requiring proper asset management. Sewer asset management relies to a large extent on available information. In sewer systems where pipe corrosion is the dominant failure mechanism, visual inspection by closed circuit television (CCTV) and core sampling are among the methods mostly applied to assess sewer pipe condition. This ...


    By IWA Publishing

  • BOSS 2000 HDPE Storm Sewer Pipe, Stettler, AB

    Owner: Town of Stettler Installer: Woooden Construction Ltd. Designer: Associated Engineering Alberta Ltd. Location: 57 Street, Stettler, Alberta As part of a sanitary main replacement project, the Town of Stettler was faced with the challenge of replacing an aging storm sewer line under very low cover conditions. ...


    By Armtec

  • Global sensitivity analysis of an in-sewer process model for the study of sulfide-induced corrosion of concrete

    The presence of high concentrations of hydrogen sulfide in the sewer system can result in corrosion of the concrete sewer pipes. The formation and fate of hydrogen sulfide in the sewer system is governed by a complex system of biological, chemical and physical processes. Therefore, mechanistic models have been developed to describe the underlying processes. In this work, global sensitivity ...


    By IWA Publishing

  • Process to Estimate Sanitary Sewer Pipe Remaining Life Provides MWWSSB Remedial Decision Information

    ABSTRACTA condition assessment study for the Water Works and Sanitary Sewer Board of the City of Montgomery’s (MWWSSB’s) West Catoma Interceptor (WCI) was conducted in 1998 and 2003. The WCI was evaluated in 1998 using core sampling, closed-circuit television, and manhole (MH) inspections. Approximately 193 MHs and 65,000 linear feet (LF) of pipe were inspected. A subsequent study conducted in ...

  • Quantitative pipe condition assessment with Pipe Penetrating Radar

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in / 450mm) non-ferrous (reinforced concrete, vitrified clay, PVC, HDPE, etc.) pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids ...


    By SewerVUE

  • DFW direct bury of storm sewer case study

    Airport Solutions North Texas Contracting has placed the first HOBAS pipe at DFW International Airport in the Dallas/Fort Worth mid-cities. That first installation was a repair to an 84-inch corrugated steel culvert that had failed and created a sink hole approximately 30 feet deep and almost 20 feet in diameter after a series of heavy rains in 2007. North Texas Contracting of Keller, Texas ...


    By Hobas Pipe USA

  • Delivering an Enhanced Sewer Condition Prioritization Process

    SCREAM™ is a sewer and manhole condition assessment tool developed by CH2MHill. It has been built into Wallingford Software’s InfoNet asset management solution as one of the standard choices for sewer and manhole condition grading. There is emphasis across the collections systems industry worldwide for sewer condition prioritization methods and manhole condition ranking. Although currently the UK ...


    By Innovyze

  • Relining with corrugated steel pipe, Mississauga, ON

    Owner: Ministry of Transportation, Ontario Consultant: Morrison Hershfield Contractor: Underground Services Limited Location: Mississauga, Ontario With over 320,000 vehicles per day the intersection of Highways 401, 403 and 410 in Mississauga, Ontario, is one of the busiest in North America. At the same location can be ...


    By Armtec

  • Locating pipes and cables case study

    GPR can be used to determine the location and depth of metallic, non-metallic, plastic, concrete and asbestos-concrete utilities, and cables (power, signal, etc.) Locating of  City Utilities The VIY3-300 GPR was used for locating of city utilities (water, gas, sewer, etc.). This profile shows city utilities at a depth of 1.2 and 2.0 meters (wave speed is 130 meters per ...


    By Transient Technologies LLC

  • Pumps Redirects Sewer Line Emergency Situation in Albuquerque, New Mexico

    Griffin was called by TLC Plumbing in April while working on a project in Albuquerque, N.M., to look at a site where a 54-in. sewer line had collapsed. The collapse had resulted in a major intersection in Albuquerque to be closed and sewage to overflow. TLC had worked to contain the situation, but in order to make the repairs realized, bypass pumping would be required. The sewer line that had ...


    By Griffin Dewatering

  • Pipeline infrastructure renewal at Miami-Dade Water & Sewer Department

    Abstract Various governmental, professional and private studies have shown that the replacement costs of underground pipeline infrastructure is excessive and that best practice approaches for infrastructure risk management promote condition assessment programs to understand the actual condition of individual pipe sections in order to best allocate limited capital replacement and ...


    By Pure Technologies

  • Balancing growth and conservation - Precast concrete manholes become part of the stormwater solution

    When American Fork, Utah, decided to approve construction of a 175-acre commercial center, the city engineers had to consider the environmental effect it would have on a 45-acre wetland right next door. Under the EPA´s Phase II Storm Water Rules, adapted in late 1999, almost any city large enough to require a storm sewer system must balance growth with the environmental impacts of ...


    By BaySaver Technologies, Inc.

  • Aerobic and Anaerobic Transformations of Sulfide in a Sewer System – Field Study and Model Simulations

    ABSTRACTThe formation and fate of sulfide in a force main and a downstream-located gravity sewer were investigated in an extensive field study. Sulfide formation during approximately 4 hours of anaerobic transport in the force main was significant. The following gravity sewer was aerobic and a fast reduction of the sulfide concentration was observed due to sulfide oxidation and emission of ...

  • 5 Pieces of equipment needed for the pipe bursting process

    Sewer pipe bursting looks a little bit like magic if you compare it to the traditional methods of sewer replacement. With the use of underground construction equipment, including directional boring equipment, sewer technicians are able to pull a new pipe through the old pipe without digging a hole into the top surface of the ground. The sewer pipe bursting method is the perfect pipe replacement ...


    By TRIC Tools Inc.

  • Robot Device for Pipe Inspection - Case Study

    In 2005, Pure Technologies (Pure), a provider of various structural monitoring and leak-detection technologies, set about to develop a pipeline assessment tool that could monitor and report on the condition of pre-stressed concrete cylinder pipes (PCCP) utilized in municipal water and sewer systems. The tool’s competitive advantage would be accurate assessment decoupled from the need to ...


    By Pure Technologies

  • Applications of Pipe Penetrating Radar for Advanced Pipe Condition Assessments: the Clark Regional Wastewater District (WA) Case Study

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter non-metallic (reinforced concrete, vitrified clay, PVC, HDPE, etc.) underground pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids outside ...


    By SewerVUE

  • Wastewater Treatment Facility Rehabilitation Arrowhead Sewer Company, Inc. Pocono Lake, Pennsylvania

    Arrowhead Sewer Company, Inc. hired Princeton Hydro, LLC to provide engineering services to reinstall an inflow Equalization Tank that floated due to unforeseen groundwater conditions. Given site and layout restrictions, Princeton Hydro designed groundwater and overland flow control elements to buffer the tank from groundwater uplift. The system consisted of two main parts: a diversion channel to ...


    By Invisible Structures, Inc.

  • Climate change: More intense rains could swamp Chicago`s aging sewers

    In a city built on a swamp, where rainstorms already flood basements and force sewage into Lake Michigan and local streams, climate change could make Chicago's chronic water pollution woes even worse. Researchers hired by Mayor Richard Daley's office estimate that intense rainfall will happen more frequently in the not-so-distant future because of warming global temperatures, challenging the ...

  • Multi-sensor inspection robot shows benefits of pipe penetrating radar - Case Study

    Pipe penetrating radar (PPR), the in-pipe application of ground penetrating radar (GPR) is one of the most promising quantitative pipe condition assessment technologies to emerge in recent years. With most of the underground pipe infrastructure reaching the end of their design life there is a need to provide measurable data in order to establish the extent of rehabilitation required or the timing ...


    By SewerVUE

  • NCDOT culvert rehab case study

    HOBAS for DOT Projects The North Carolina Department of Transportation had a lot of challenges in rehabilitating an aging culvert along its seacoast near Nags Head. The existing culvert was leaking, causing sand to migrate into the pipe, undermining the sand dunes above. The line which outfalls directly into the Atlantic Ocean was also subject to a severe environment and was therefore ...


    By Hobas Pipe USA

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