Assessing Stream Channel Stability at Bridges in Physiographic Regions PDF Download
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Author: Peggy A. Johnson
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 164
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Book Description
Author: Peggy A. Johnson
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 164
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Book Description
Author: U. S. Department Transportation
Publisher: CreateSpace
ISBN: 9781508858379
Category :
Languages : en
Pages : 162
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Book Description
The goal of bridge inspections is to assess the safety of bridges on a regular basis so that any deficiencies will be identified and corrected. Given the large number of bridges over water in any State, bridge inspectors must inspect the superstructure, substructure, and waterway of each bridge in a short amount of time. A typical range of time for bridge inspections is 15 minutes to 2 hours, depending on the complexity and condition of the bridge. A more detailed inspection might ensue if a deficiency is detected. In the case of waterways and erosion, a hydraulic engineer might visit the bridge to assess the situation in greater detail. For either of these levels of inspection, and given the very limited right-of-way at most bridges, the inspector or engineer typically will not walk more than a few hundred feet upstream or downstream. Most inspectors do not leave the bridge right-of-way. Thus, a method is needed for systematically assessing the stability of the stream channel with respect to the bridge. The ability to assess channel stability in the vicinity of bridges also is needed for designing road crossings, and for mitigating and predicting erosion at those structures. Bridge failures due to geomorphic or regional instability have been experienced in many locations in the United States and elsewhere. Federal Highway Administration (FHWA) guidelines for stream stability and erosion at bridges describe examples of problems at bridges caused by regional channel degradation and lateral bank changes. These guidelines require that engineers assess channel instability in their bridge assessments. However, for most bridges, only a preliminary assessment can be conducted due to time and money constraints. The objective of this study was to expand and improve previous rapid stability assessment methods to include additional factors, such as major physiographic units across the United States, range of bank materials and complexities, critical bank heights, stream type and processes, sand bed streams, and in-channel bars or lack of bars.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 254
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Author: American Society of Civil Engineers
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 1176
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Book Description
Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 484
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Book Description
Author: David L. Rosgen
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 402
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Author: David L. Rosgen
Publisher:
ISBN: 9780979130816
Category : Geomorphology
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 76
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Book Description
Author: Everett V. Richardson
Publisher: ASCE Publications
ISBN: 9780784474655
Category : Technology & Engineering
Languages : en
Pages : 1076
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Book Description
Sponsored by the Water Resources Engineering (Hydraulics) Divsion of ASCE. This collection contains 75 papers and 321 abstracts presented at conferences sponsored by the Water Resources Engineering (Hydraulics) Division of ASCE from 1991 through 1998. The collection contains many new and expanded versions of the original papers and is designed to assist the practitioner with the concepts in evaluating stream instability and scour at bridges. Topics include: history of bridge scour research; bridge scour determination; stream stability and geomorphology; construction scour; instrumentation for measuring and monitoring; field measurement; computer and physical modeling of bridge scour; scour at culverts; and economic and risk analysis. One important paper contains 384 field measurements of local scour at piers made by the U.S. Geological Survey.
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 898
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Book Description
