A Critical Evaluation of Bridge Scour for Michigan Specific Conditions PDF Download
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Author: Donald D. Carpenter
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 0
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Book Description
The overall goal of this research was to improve MDOT's bridge scour prediction capability. In an effort to achieve this goal, the research team evaluated scour prediction methods utilized by state DOTs, conducted a field data collection project, and proposed an alternative approach for pier scour prediction. Nine locations and twelve unique spans were selected for monitoring. During the investigation, seven episodic measurements resulted in detectable pier scour. Scour depths ranged from 0.7 to 1.5 feet with the maximum return period corresponding to a seven-year flood event. No detectable scour events occurred at the continuous scour monitoring locations. This investigation also included the use of a Jet Erosion Test (JET) to experimentally determine if in-situ soil conditions could be correlated with measured bridge scour.
Author: Donald D. Carpenter
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 0
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Book Description
The overall goal of this research was to improve MDOT's bridge scour prediction capability. In an effort to achieve this goal, the research team evaluated scour prediction methods utilized by state DOTs, conducted a field data collection project, and proposed an alternative approach for pier scour prediction. Nine locations and twelve unique spans were selected for monitoring. During the investigation, seven episodic measurements resulted in detectable pier scour. Scour depths ranged from 0.7 to 1.5 feet with the maximum return period corresponding to a seven-year flood event. No detectable scour events occurred at the continuous scour monitoring locations. This investigation also included the use of a Jet Erosion Test (JET) to experimentally determine if in-situ soil conditions could be correlated with measured bridge scour.
Author: John Kattell
Publisher:
ISBN:
Category : Scour at bridges
Languages : en
Pages : 52
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Book Description
Author:
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 64
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Book Description
Author: Peter Frederick Lagasse
Publisher: Transportation Research Board
ISBN: 0309283566
Category : Social Science
Languages : en
Pages : 175
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Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Report 761: Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction presents a reference guide designed to help identify and evaluate the uncertainties associated with bridge scour prediction including hydrologic, hydraulic, and model/equation uncertainty. For complex foundation systems and channel conditions, the report includes a step-by-step procedure designed to provide scour factors for site-specific conditions."--Publisher's description.
Author: David J. Holtschlag
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 92
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Book Description
Author: U.s. Department of Transportation
Publisher: Createspace Independent Pub
ISBN: 9781508680758
Category : Technology & Engineering
Languages : en
Pages : 342
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Book Description
The most common cause of bridge failures is from floods scouring bed material from around bridge foundations. Scour is the engineering term for the erosion caused by water of the soil surrounding a bridge foundation (piers and abutments). The purpose of this document is to provide guidelines for the following: 1. Designing new and replacement bridges to resist scour, 2. Evaluating existing bridges for vulnerability to scour, 3. Inspecting bridges for scour, 4. Improving the state-of-practice of estimating scour at bridges. This document is the fifth edition of HEC-18. It presents the state of knowledge and practice for the design, evaluation and inspection of bridges for scour. There are two companion documents, HEC-20 entitled "Stream Stability at Highway Structures," and HEC-23 entitled "Bridge Scour and Stream Instability Countermeasures." These three documents contain updated material from previous editions and continued research by NCHRP, FHWA, State DOTs, and universities. This fifth edition of HEC-18 also contains revisions obtained from further scour-related developments and the use of the 2001 edition by the highway community. The major changes in the fifth edition of HEC-18 are: expanded discussion on the policy and regulatory basis for the FHWA Scour Program, including risk-based approaches for evaluations, developing Plans of Action (POAs) for scour critical bridges, and expanded discussion on countermeasure design philosophy (new vs. existing bridges). This fifth edition includes: a new section on contraction scour in cohesive materials, an updated abutment scour section, alternative abutment design approaches, alternative procedures for estimating pier scour, and new guidance on pier scour with debris loading. There is a new chapter on soils, rock and geotechnical considerations related to scour. Additional changes include: a new approach for pier scour in coarse material, new sections on pier scour in cohesive materials and pier scour in erodible rock, revised guidance for vertical contraction scour (pressure flow) conditions, guidance for predicting scour at bottomless culverts, deletion of the "General Scour" term, and revised discussion on scour at tidal bridges to reflect material now covered in HEC-25 (2nd Edition).
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 25
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Book Description
This digest summarizes key findings of three National Cooperative Highway Research Program (NCHRP) projects: Project 24-27(01) - Evaluation of Bridge Scour Research: Pier Scour Processes and Predictions; Project 24-27(02) - Evaluation of Bridge Scour Research: Abutment and Contraction Scour Processes and Predictions; and Project 24-27(03) - Evaluation of Bridge Scour Research: Geomorphic Processes and Predictions. These projects had the common objectives to (1) critically evaluate the body of bridge scour research completed worldwide since the early 1990s and (2) propose specific research results for adoption by AASHTO in its development of future editions of two key highway hydraulic engineering guidance documents: Policy for Design of Highway Drainage Facilities and Recommended Procedures for Design of Highway Drainage Facilities.The digest is based on project final reports available as NCHRP Web-Only Documents 175, 181, and 177, respectively.
Author: Beatrice E. Hunt
Publisher: Transportation Research Board
ISBN: 0309098343
Category : Religion
Languages : en
Pages : 168
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Book Description
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 244
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Book Description
This document is the third of HEC 18, i.e., presents the state of knowledge and practice for the design, evaluation, and inspection of bridges for scour. It contains updated material not included in the second edition dated April 1993. This document is a revision to HEC 18 dated April 1993 which, in turn, was an update of HEC 18 dated Feburary 1991 and of the publication, "Interim Procedures for Evaluating Scour at Bridges," issued in September 1988 as part of the FHWA Technical Advisory T 5140.20, "Scour at Bridges." T 5140.20 has since been superseded by T 5410.23, "Evaluating Scour at Bridges" dated October 28,1991. This document contains revisions obtained from further scour-related developments and use of the 1993 edition of HEC 18 by the highway community
Author: Robert Ettema
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 181
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Book Description
This report explores the current state of knowledge regarding bridge pier scour, assesses several methods for design estimates of scour depth, examines a structured methodology for scour depth estimation for design purposes, and highlights aspects of pier scour in need of potential further research.
