Author: Andrew G. Heydinger
Publisher:
ISBN:
Category : Drainage
Languages : en
Pages : 124
Book Description
An investigation was conducted to evaluate prefabricated edge drain (PED) construction procedures and to assess the condition of PEDs installed in Ohio between 1988 and 1993. The research included a survey of department of transportation engineers in other states and Ohio Department of Transportation (ODOT) design and construction engineers. The condition of PEDs installed in Ohio was evaluated at six sites throughout Ohio by excavating short sections of PEDs for visual inspections and permittivity testing. A video borescope with a 25-ft (7.6-m) long fiber optic cable was used to investigate the in situ condition of the PED. Permittivity testing of the PED fabric was conducted in the field on PED samples removed from the excavations. Specifications for installing PED vary considerably among the states using PED. ODOT current specifications require placing the PED on the outside of the trench and using a granular backfill. Problems that have been reported include deformation of the PED core, compression of the filter fabric into the core, blinding and clogging of the filter, sedimentation of the core and blockage of drainage outlets. In most cases, the problems were considered minor. The problems cited above were observed at all six sites during the video borescope inspections. In spite of problems with the filter fabric, the permittivity of the filter fabric was not significantly reduced. The problems with PED result in reduced drainage capacity. However, the PEDs are effective in providing drainage provided the drainage outlets are not blocked. Construction specifications should be observed to minimize problems. Maintenance personnel should inspect drainage outlets on a regular basis to ensure that the outlets are not blocked.
Evaluation of Prefabricated Edge Drains (PED) in Ohio
Author: Andrew G. Heydinger
Publisher:
ISBN:
Category : Drainage
Languages : en
Pages : 124
Book Description
An investigation was conducted to evaluate prefabricated edge drain (PED) construction procedures and to assess the condition of PEDs installed in Ohio between 1988 and 1993. The research included a survey of department of transportation engineers in other states and Ohio Department of Transportation (ODOT) design and construction engineers. The condition of PEDs installed in Ohio was evaluated at six sites throughout Ohio by excavating short sections of PEDs for visual inspections and permittivity testing. A video borescope with a 25-ft (7.6-m) long fiber optic cable was used to investigate the in situ condition of the PED. Permittivity testing of the PED fabric was conducted in the field on PED samples removed from the excavations. Specifications for installing PED vary considerably among the states using PED. ODOT current specifications require placing the PED on the outside of the trench and using a granular backfill. Problems that have been reported include deformation of the PED core, compression of the filter fabric into the core, blinding and clogging of the filter, sedimentation of the core and blockage of drainage outlets. In most cases, the problems were considered minor. The problems cited above were observed at all six sites during the video borescope inspections. In spite of problems with the filter fabric, the permittivity of the filter fabric was not significantly reduced. The problems with PED result in reduced drainage capacity. However, the PEDs are effective in providing drainage provided the drainage outlets are not blocked. Construction specifications should be observed to minimize problems. Maintenance personnel should inspect drainage outlets on a regular basis to ensure that the outlets are not blocked.
Publisher:
ISBN:
Category : Drainage
Languages : en
Pages : 124
Book Description
An investigation was conducted to evaluate prefabricated edge drain (PED) construction procedures and to assess the condition of PEDs installed in Ohio between 1988 and 1993. The research included a survey of department of transportation engineers in other states and Ohio Department of Transportation (ODOT) design and construction engineers. The condition of PEDs installed in Ohio was evaluated at six sites throughout Ohio by excavating short sections of PEDs for visual inspections and permittivity testing. A video borescope with a 25-ft (7.6-m) long fiber optic cable was used to investigate the in situ condition of the PED. Permittivity testing of the PED fabric was conducted in the field on PED samples removed from the excavations. Specifications for installing PED vary considerably among the states using PED. ODOT current specifications require placing the PED on the outside of the trench and using a granular backfill. Problems that have been reported include deformation of the PED core, compression of the filter fabric into the core, blinding and clogging of the filter, sedimentation of the core and blockage of drainage outlets. In most cases, the problems were considered minor. The problems cited above were observed at all six sites during the video borescope inspections. In spite of problems with the filter fabric, the permittivity of the filter fabric was not significantly reduced. The problems with PED result in reduced drainage capacity. However, the PEDs are effective in providing drainage provided the drainage outlets are not blocked. Construction specifications should be observed to minimize problems. Maintenance personnel should inspect drainage outlets on a regular basis to ensure that the outlets are not blocked.
Laboratory Evaluation of Prefabricated Highway Edge Drains
Author: Ahmed Mohamed Elsharief
Publisher:
ISBN:
Category : Geotextiles
Languages : en
Pages : 283
Book Description
Publisher:
ISBN:
Category : Geotextiles
Languages : en
Pages : 283
Book Description
Ohio Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 248
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 248
Book Description
Design and Construction of Bridge Approaches
Author: Harvey E. Wahls
Publisher: Transportation Research Board
ISBN: 9780309049054
Category : Technology & Engineering
Languages : en
Pages : 56
Book Description
Includes case histories of the Dumbarton Bridge (San Francisco Bay, Calif.), the Rainier Avenue Embankment (Seattle, Wash.) and the Gallows Road Grade Separation (Fairfax, Va.)
Publisher: Transportation Research Board
ISBN: 9780309049054
Category : Technology & Engineering
Languages : en
Pages : 56
Book Description
Includes case histories of the Dumbarton Bridge (San Francisco Bay, Calif.), the Rainier Avenue Embankment (Seattle, Wash.) and the Gallows Road Grade Separation (Fairfax, Va.)
Sanitary Code, State of Louisiana
Author: Louisiana
Publisher:
ISBN:
Category : Public health
Languages : en
Pages : 202
Book Description
Publisher:
ISBN:
Category : Public health
Languages : en
Pages : 202
Book Description
Onsite Wastewater Treatment Systems Manual
Author:
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 378
Book Description
"This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 378
Book Description
"This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
Child Care Design Guide
Author: Anita Rui Olds
Publisher: McGraw-Hill Professional
ISBN:
Category : Architecture
Languages : en
Pages : 522
Book Description
A-Z's for designing superior day care facilities Virtually unknown 30 years ago, daycare has become a growth industry. Child Care Design Guide helps architects and designers plan, design, and renovate functional, developmentally rich, pleasing centers. Author Anita Rui Olds brings to this work over 25 years of design experience with children's facilities. She gives you step-by-step explanations of interior and exterior layout and design principles fleshed out in clarifying case studies. You learn about licensing and code requirements, operational standards and strategies, and get helpful checklists, charts and graphs for optimum facility design within time, space, and budgetary constraints. This highly visual work features over 300 floor plans for infant and toddler, preschool, and afterschool spaces, plus areas for outdoor play and more.
Publisher: McGraw-Hill Professional
ISBN:
Category : Architecture
Languages : en
Pages : 522
Book Description
A-Z's for designing superior day care facilities Virtually unknown 30 years ago, daycare has become a growth industry. Child Care Design Guide helps architects and designers plan, design, and renovate functional, developmentally rich, pleasing centers. Author Anita Rui Olds brings to this work over 25 years of design experience with children's facilities. She gives you step-by-step explanations of interior and exterior layout and design principles fleshed out in clarifying case studies. You learn about licensing and code requirements, operational standards and strategies, and get helpful checklists, charts and graphs for optimum facility design within time, space, and budgetary constraints. This highly visual work features over 300 floor plans for infant and toddler, preschool, and afterschool spaces, plus areas for outdoor play and more.
Implementing Bicycle Improvements at the Local Level
Fundamentals of Nursing (Book Only)
Author: Sue Carter DeLaune
Publisher: Cengage Learning
ISBN: 9781111319465
Category : Nursing
Languages : en
Pages : 0
Book Description
Publisher: Cengage Learning
ISBN: 9781111319465
Category : Nursing
Languages : en
Pages : 0
Book Description
The Elasmobranch Husbandry Manual
Author: Mark F. L. Smith
Publisher:
ISBN:
Category : Captive marine animals
Languages : en
Pages : 616
Book Description
Publisher:
ISBN:
Category : Captive marine animals
Languages : en
Pages : 616
Book Description