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Session 17 - Hydraulics

Session: 17

Session Title:  Developing Hydraulic Research

Organizer: Jonathan Prier

Moderator: Jonathan Prier


Topic A Title:  Hydraulic Efficiency of ODOT Drainage Structures

Speaker (s):  Jeff Syar, Marta Sitek

Name, Company, Location:  ODOT Central Office

Topic A Description: Stormwater runoff from streets and highways is typically captured by drainage structures strategically placed when roadways use curb or curb and gutter systems. These structures include catch basins with grates, inlets, or combination grates/inlets that collect and discharge storm water runoff to buried pipe conveyance systems. The performance of these drainage structures is measured in terms of hydraulic efficiency, which is defined as the percentage of flow captured by the basin as compared to the total flow draining to the structure.  Understanding the performance of these drainage structures allows for a safe and economical design which prevents flooding along Ohio roadways.  The current hydraulic design methodology used to model ODOT drainage structures is believed to have been developed in the mid to late 1970’s and was based on early FHWA Hydraulic Engineering Circular 12 (HEC-12).  It’s not certain if any physical modelling for standard ODOT grates was performed, adopted from another DOT, or estimated from known grates.  Much of that institutional knowledge has been lost as many of the original design engineers have since left or retired from ODOT.

In the past, one of the primary obstacles for evaluating the hydraulic performance of drainage structures was the need for expensive physical modeling in a hydraulics laboratory. However, with more recent advances in software and computing power, Computational Fluid Dynamic (CFD) Modeling can now be used to develop mathematical models at a fraction of the cost. CFD Modelling has been showcased at hydraulic engineering conferences for evaluating different applications such as hydroplaning, catch basin performance, and rock retaining walls in rivers.  The Federal Highway Administration (FHWA) currently offers CFD modeling through the pooled fund study, High Performance Computational Fluid Dynamics Modeling Services for Highway Hydraulics”.  Referenced by study number TPF-5(279), FHWA & Argonne National Laboratory have been providing successful CFD modeling for multiple DOTs since 2013. Presentation will highlight pavement spread calculation methods employed by ODOT and FHWA HEC-22 with an emphasis on grate hydraulic capacity and recent research findings from Computational Fluid Dynamic (CFD) modelling performed by the National Argonne Laboratory for ODOT specific geometry and grates.


Topic B Title:  Re-Rounding of Deflected Thermoplastic Conduit

Speaker (s):  Kevin White

Name, Company, Location:  E L Robinson Engineering

Topic B Description: High density polyethylene (HDPE) pipes are commonly used for roadway surface drainage. These pipes are characterized by their flexibility. Since the pipes are known for their flexibility, they are also expected to deform as the surrounding soils deform. The Ohio Department of Transportation specifies a deflection limit of 7.5% for the pipe’s inner vertical diameter. If a conduit deflection exceeds this limit, the pipe must be replaced or remediated. A technique called re-rounding is used as potential remediation solution for deflected thermoplastic pipe. This presentation examines the performance of re-rounding in the remediation of deflected thermoplastic pipes in a controlled field experiment.


Topic C Title:  Innovative Access Solutions

Speaker (s):  James Cassel, Lucas Darby

Name, Company, Location:  EJ

Topic C Description: Presentation to be conducted by both Luke Darby and James Cassel, Technical Sales Representatives from EJ (formerly East Jordan Iron Works). Coinciding with the theme for OTEC 2020, the well paced and informative presentation will focus on innovative materials, products and applications for today’s infrastructure access market.  This non sales focused presentation outlines how new castings are designed, tested and built to meet the needs of the ever evolving industry.  Innovative materials, like ductile iron, is allowing designers, manufacturers and Owners substantial flexibility while constructing a project.  Industry wide optimization of access solutions with a focus on safety, ergonomics and longevity is reviewed in depth.  All of these industry advancements are then put into motion with new to market innovative products.  These products are discussed in a generic manner with a focus on design and application benefits.  Presentation is concluded with advice on where to access all of this information and how to integrate these smart products into Ohio’s infrastructure.  Through this collaboration with industry partners, Ohio can move forward transforming the future of transportation.  You don’t know what is out there unless you learn what is out there!