Energy Dissipation in Eighteen-Foot Broken-Back Culverts Using Laboratory Models

Tyagi, Avdhesh; Ali, Abdelfatah; Johnson, Nicholas; Motte, Mariazel Rios; Davis, Taylor

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Energy Dissipation in Eighteen-Foot Broken-Back Culverts Using Laboratory Models

2012-09-01
By Tyagi, Avdhesh ; Ali, Abdelfatah ; Johnson, Nicholas ; ...

File Language:

English

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Creators:

Tyagi, Avdhesh ; Ali, Abdelfatah ; Johnson, Nicholas ; Motte, Mariazel Rios ; Davis, Taylor
Corporate Creators:

Oklahoma State University. School of Civil & Environmental Engineering
Corporate Contributors:

Oklahoma. Department of Transportation. Planning & Research Division ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Broken-back Culvert Culverts Dissipation Energy Conversion Hydraulic Jump Open-channel Flow Pressure Pressure Flow
Publication/ Report Number:

FHWA-OK-12-05
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report October 2011 –September 2012
Corporate Publisher:

Oklahoma. Department of Transportation
Abstract:

This report represents Phase III of broken-back culverts with a drop of 18 feet. The first phase of this research was performed for a drop of 24 feet, and the second phase of this research was carried out for a drop of 6 feet. This research investigates the reduction in scour downstream of a broken-back culvert by forming a hydraulic jump inside the culvert. A broken-back culvert is used in areas of high relief and steep topography as it has one or more breaks in profile slope. A broken-back culvert in the laboratory represents a 1 (vertical) to 2 (horizontal) slope after the upstream inlet and then continuing 114 feet at a 1 percent slope in the flat part of the culvert to the downstream outlet. Also, in this project, two other slopes, 0.6 and 0.3 percent, were simulated. The prototypes for these experiments were either a two barrel 10-foot by 10-foot, or a two barrel 10-foot by 20-foot reinforced concrete. The drop between inlet and outlet is selected as 18 feet. Three flow conditions were simulated, consisting of 0.8, 1.0 and 1.2 times the culvert depth.
Format:

PDF
Funding:

2234
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:18c8d093e57476a0baad4a8d0efea1a6445c0cd816ab4c4ffb77b01305f10d2ab66d7b98fc3adcdc854ea7ca899a3790c4aba0b9bcc7024e4f7e97459ab86b7e
Download URL:

https://rosap.ntl.bts.gov/view/dot/89135/dot_89135_DS1.pdf
File Type:

[PDF - 6.74 MB ]

File Language:

English

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