Stream Stability at Highway Structures

Stream Stability at Highway Structures

Significant new material in this edition includes chapters on sediment transport concepts and channel stability in gravel bed streams, as well as expanded coverage of channel restoration concepts.

Author: U.s. Department of Transportation

Publisher: Createspace Independent Pub

ISBN: 1508680825

Category: Technology & Engineering

Page: 330

View: 931

Approximately 500,000 bridges in the National Bridge Inventory (NBI) are built over streams. A large proportion of these bridges span alluvial streams that are continually adjusting their beds and banks. Many, especially those on more active streams, will experience problems with aggradation, degradation, bank erosion, and lateral channel shift during their useful life. The purpose of this document is to provide guidelines for identifying stream instability problems at highway stream crossings. Techniques for stream channel classification and reconnaissance, as well as rapid assessment methods for channel instability are summarized. Qualitative and quantitative geomorphic and engineering techniques useful in stream channel stability analysis are presented. This publication is an update of the third edition published in 2001. The HEC-20 manual covers geomorphic and hydraulic factors that affect stream stability and provides a step-by-step analysis procedure for evaluation of stream stability problems. Stream channel classification, stream reconnaissance techniques, and rapid assessment methods for channel stability are covered in detail. Quantitative techniques for channel stability analysis, including degradation analysis, are provided, and channel restoration concepts are introduced. Significant new material in this edition includes chapters on sediment transport concepts and channel stability in gravel bed streams, as well as expanded coverage of channel restoration concepts.
Categories: Technology & Engineering

Stream Stability at Highway Structures Hydraulic Engineering Circular No 20 Publication No Fhwa Hif 12 004

Stream Stability at Highway Structures   Hydraulic Engineering Circular No  20  Publication No  Fhwa Hif 12 004

Full color, richly illustrated book. The purpose of this document is to provide guidelines for identifying stream instability problems at highway stream crossings.

Author: Federal Highway Administration

Publisher: www.Militarybookshop.CompanyUK

ISBN: 1782661220

Category: Transportation

Page: 328

View: 692

Full color, richly illustrated book. The purpose of this document is to provide guidelines for identifying stream instability problems at highway stream crossings. Techniques for stream channel classification and reconnaissance, as well as rapid assessment methods for channel instability are summarized. Qualitative and quantitative geomorphic and engineering techniques useful in stream channel stability analysis are presented.
Categories: Transportation

Stream Stability and Scour at Highway Bridges

Stream Stability and Scour at Highway Bridges

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.

Author: Everett V. Richardson

Publisher: ASCE Publications

ISBN: 0784474656

Category: Technology & Engineering

Page: 1040

View: 195

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.
Categories: Technology & Engineering

CAESAR

CAESAR

Author: Richard N. Palmer

Publisher: Transportation Research Board

ISBN: 0309063205

Category: CAESAR (Computer file)

Page: 24

View: 825

Categories: CAESAR (Computer file)

Stream Instability Bridge Scour and Countermeasures A Field Guide for Bridge Inspectors

Stream Instability  Bridge Scour  and Countermeasures  A Field Guide for Bridge Inspectors

Code of Federal Regulations, 23 CFR Part 650, "Bridges, Structures, and
Hydraulics," Subpart C, "National Bridge Inspection Standards." 3. Federal
Highway Administration, "Recording and Coding Guide for the Structure
Inventory and ...

Author: Transportation Dept., Federal Highway Administration

Publisher: Government Printing Office

ISBN: 0160876125

Category: Technology & Engineering

Page: 47

View: 388

FHWA Publication No. FHWA-NHI-08-0106. February 2009. Explains the behavior of rivers in order to recognize changing conditions associated with unstable streams or scour at bridge foundations that may threaten the stability of the bridge. Provides tips and guidance on what to look for with regard to both stream instability, including lateral instability, degradation, and aggradation, and scour at bridges, including contraction scour, pier scour, and abutment scour. Also covered are plans of action and countermeasures, such as monitoring, flood watches, bridge closures, and river training countermeasures.
Categories: Technology & Engineering

NHI Training Catalog

NHI Training Catalog

COURSE TITLE : Stream Stability and Scour at Highway Bridges This course
provides comprehensive training in the ... Engineering Circulars ( HEC ) , "
Evaluating Scour at Bridges ” ( HEC18 ) , and " Stream Stability at Highway
Structures ...

Author: National Highway Institute (U.S.)

Publisher:

ISBN: NWU:35556033391053

Category: Transportation

Page:

View: 422

Categories: Transportation

Evaluating Scour at Bridges

Evaluating Scour at Bridges

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.

Author: U.s. Department of Transportation

Publisher: Createspace Independent Pub

ISBN: 1508680752

Category: Technology & Engineering

Page: 342

View: 848

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).
Categories: Technology & Engineering

NHI Catalog

NHI Catalog

COURSE NUMBER FHWA - NHI - 135046 COURSE TITLE NHI TRAINING
Stream Stability and Scour at Highway ... Circulars ( HEC ) , " Evaluating Scour at
Bridges " ( HEC - 18 ) , and " Stream Stability at Highway Structures " ( HEC - 20 )
.

Author: National Highway Institute (U.S.)

Publisher:

ISBN: NWU:35556039332283

Category: Transportation

Page:

View: 191

Categories: Transportation

Report No FHWA RD

Report No  FHWA RD

Author: United States. Federal Highway Administration. Offices of Research and Development

Publisher:

ISBN: UOM:39015023302733

Category:

Page:

View: 333

Categories:

River Engineering for Highway Encroachments

River Engineering for Highway Encroachments

The Federal Highway Administration document "Highways in the River Environment - Hydraulic and Environmental Design Considerations" was first published in 1975, was revised in 1990, and is now issued as Hydraulic Design Series 6, "River ...

Author: U.s. Department of Transportation

Publisher: Createspace Independent Pub

ISBN: 1508666504

Category: Technology & Engineering

Page: 648

View: 975

The Federal Highway Administration document "Highways in the River Environment - Hydraulic and Environmental Design Considerations" was first published in 1975, was revised in 1990, and is now issued as Hydraulic Design Series 6, "River Engineering for Highway Encroachments." This document has proven to be a singularly authoritative document for the design of highway associated hydraulic structures in moveable boundary waterways. This revised document incorporates many technical advances that have been made in this discipline since 1990. In addition, Hydraulic Engineering Circulars (HEC) 18, 20, and 23, have been published since 1990. This document and the HECs provide detailed guidance on stream instability, scour, and appropriate countermeasures. In HDS-6, hydraulic problems at stream crossings are described in detail and the hydraulic principles of rigid and moveable boundary channels are discussed. In the United States, the average annual damage related to hydraulic problems at highway facilities on the Federal-aid system is $40 million. Damages by streams can be reduced significantly by considering channel stability. The types of river changes to be carefully considered relate to: (1) lateral bank erosion; (2) degradation and aggradation of the streambed that continues over a period of years, and (3) natural short-term fluctuations of streambed elevation that are usually associated with the passage of floods. The major topics are: sediment transport, natural and human induced causes of waterway response, stream stabilization (bed and banks), hydraulic modeling and computer applications, and countermeasures. Case histories of typical human and natural impacts on waterways are analyzed.
Categories: Technology & Engineering

Course Catalog

Course Catalog

Author:

Publisher:

ISBN: NWU:35556029982311

Category: Highway engineering

Page:

View: 368

Categories: Highway engineering

Restoration of Fish Habitat in Relocated Streams

Restoration of Fish Habitat in Relocated Streams

This manual provides guidelines for the design and construction of relocated channels, and describes measures that will lead to rapid recovery of new channels by natural processes.

Author: United States. Federal Highway Administration

Publisher:

ISBN: MINN:31951D003448652

Category: Fish habitat improvement

Page: 63

View: 237

This manual provides guidelines for the design and construction of relocated channels, and describes measures that will lead to rapid recovery of new channels by natural processes. Good design, and implementation of these measures can greatly reduce the adverse effects of stream relocation.
Categories: Fish habitat improvement

The Book of North Wales Scenery Antiquities Highways and Byeways Lakes Streams and Railways With a Map and Illustrations

The Book of North Wales  Scenery  Antiquities  Highways and Byeways  Lakes  Streams  and Railways     With a Map and Illustrations

Bishop Redman , finding the outer walls secure raised them , repaired the tower ,
and restored the whole structure ; which in Cromwell's time was destined to suffer
fresh injuries , when it was successively converted into a stable and barrack ...

Author: Charles Frederick Cliffe

Publisher:

ISBN: BL:A0022386971

Category: Wales, North

Page: 302

View: 694

Categories: Wales, North

Forest Road Operations in the Tropics

Forest Road Operations in the Tropics

To reduce the maintenance load, roads that are seldom or occasionally used
become good candidates for road closure ... frequent maintenance owing to
fewer drainage structures, smaller cut banks, and usually a higher degree of
slope stability. Roads located in valley bottoms require more frequent
maintenance owing to the greater number of drainage structures and their
proximity to larger streams.

Author: John Sessions

Publisher: Springer Science & Business Media

ISBN: 9783540463931

Category: Technology & Engineering

Page: 170

View: 988

This book brings together information on road planning, location, design, construction and maintenance to support environmentally acceptable operations in tropical forests. It highlights the challenges of road operations in the tropics, includes techniques that have been shown to be successful, and discusses newer technologies. Numerical examples are included to provide clarity for interpreting graphs, procedures, and formulas.
Categories: Technology & Engineering

Debris Problems in the River Environment

Debris Problems in the River Environment

Debris causes hydraulic problems at highway bridges nationwide.

Author: Fred F. M. Chang

Publisher:

ISBN: UCR:31210024762617

Category: Bridge failures

Page: 67

View: 330

Debris causes hydraulic problems at highway bridges nationwide. The problems are the greatest in the Pacific Northwest and the upper and lower Mississippi River Valley. Debris hazards are local and infrequent phenomena often associated with large floods. Most bridge destruction is due to accumulation against bridge components. Debris may partially or totally block waterways and create adverse hydraulic conditions that erode pier foundations and bridge abutments and do other structural damage. Many debris problems exist in forested areas with active logging operations. Bridges on streams where stream slopes are mild or moderate, in contrast to headwater streams, are more vulnerable to debris related hazards. Debris hazards occur more frequently in unstable streams where bank erosion is active.
Categories: Bridge failures

Hydraulic Research in the United States and Canada 1976

Hydraulic Research in the United States and Canada  1976

Inlets , coastal ; Inlet stability ; Puget Sound ; Tidal inlet field study ; 167 - 10182 -
410 - 00 . Inlets , coastal ; Jetty ... Inlets , highway ; Drainage ; Highway drainage ;
Inlet grating hydraulics ; 068 - 07403 - 370 - 60 . Inlets , highway ... Insects ,
stream ; Sediment transport effects ; Bedload ; 05209851 - 220 - 61 . Insects ...
Instrument towers ; Structures ; Wave forces ; Waves , design ; 405 - 10289 - 420
- 00 .

Author: Pauline H. Gurewitz

Publisher:

ISBN: UIUC:30112101555222

Category: Hydraulic engineering

Page: 363

View: 731

Categories: Hydraulic engineering

Gravel bed Rivers in the Environment

Gravel bed Rivers in the Environment

HIGHWAY. CORRIDORS. Michael J. Miles M. Miles and Associates, Victoria,
British Columbia, Canada ABSTRACT A ... Monitoring of the physical behavior of
these structures for a period of 8 to 14 years included debris and sediment
accumulation, scour formation, structural stability and ... 18.1 INTRODUCTION
There is a lengthy tradition of stream manipulation Gravel-Bed Rivers in the
Environment 393 ...

Author: Peter C. Klingeman

Publisher: Water Resources Publication

ISBN: 1887201130

Category: Technology & Engineering

Page: 832

View: 334

"Read what over 60 internationally recognized authors say about fluvial processes, the environment, and management of gravel-bed rivers. Learn about efforts to restore more-natural ecosystem functions to adversely impacted rivers. And for some mind-stretching, consider the hydraulic/geomorphic implications of cataclysmic floods on Earth and Mars. Beginning in 1980 and held at five-year intervals, these workshops have brought together leading international researchers to present and discuss new results, concepts and state-of-the-art methods to analyze fluvial processes in and manage gravel-bed rivers. The fourth workshop was held at Gold Bar, Washington, near the dynamic Skykomish River and strikingly beautiful Cascade Mountains. Workshop papers and discussions are published to document new concepts and ideas for broad use by those who study, manage or have general interests in rivers. This fourth Gravel-Bed Rivers Workshop covers three focus topics. The first topic reviews new developments regarding fluvial processes, sediment transport and channel morphology -- in eight chapters on distinct subjects. The second and third focus topics strongly emphasize gravel-beds rivers in the environment, their influences, and their management -- in the next 19 chapters. River restoration is examined for large European and North American rivers as parts of several of the environment-management chapters. Seven appended "short papers" report on research in progress, presented at the Workshop in a poster-discussion session. Also included are two special-interest chapters -- on giving a detailed analysis and morphologic/hydraulic interpretation of cataclysmic floods and one summarizing a field exercise in management options for a long braided-meandering reach of the Skykomish River near Gold Bar."--Publisher's description.
Categories: Technology & Engineering