Summary: | This course provides participants with comprehensive training in the prevention of hydraulic-related bridge failures. Course participants will receive training in conducting a stream stability classification and qualitative analysis of stream response and make estimates of scour at a bridge opening.
Material for the course comes primarily from two Hydraulic Engineering Circulars (HEC), "Evaluating Scour at Bridges" (HEC-18), 5th Edition (2012), and "Stream Stability at Highway Structures" (HEC-20), 4th Edition (2012). The effects of stream instability, scour, erosion, and stream aggradation and degradation are covered. Quantitative techniques are provided for estimating long-term degradation and for calculating the magnitude of contraction scour in a bridge opening. Procedures for estimating local scour at bridge piers and abutments for simple and complex substructures are also provided. A comprehensive workshop integrates qualitative analysis and analytical techniques to determine the need for a Scour Plan of Action for correcting stream instability and scour problems.
This comprehensive training provides preventive techniques for identifying, analyzing, and calculating various hydraulic factors that impact bridge stability. Public and private sector engineers responsible for maintaining the integrity of highway bridges will find it invaluable.
|
Learning Outcomes: | 1. Identify indicators of stream instability that can threaten bridges
2. Identify stream types and their potential for instability problems
3. Describe open-channel hydraulics concepts in bridge scour and stream instability analyses
4. Define types of scour that can occur at bridge crossings
5. Describe aggradation, degradation, and contraction scour
6. Calculate contraction scour for live bed and clear water conditions
7. Describe factors that influence scour at piers
8. Calculate pier scour for three typical case studies
9. Describe the factors that influence scour at abutments
10. Describe how HEC-18, HEC-20, and HEC-23 provide analysis procedures for stream instability and bridge scour
11.Perform Level I and II analyses
12. Classify a stream using two different classification systems
13. Conduct a qualitative analysis of stream responses
14. Apply the HEC-18 scour equations to determine total scour at a bridge
15. Determine the need for a Scour Plan of Action at a scour-critical bridge
|
Prerequisites: | Prior to the beginning of class, students are strongly encouraged to enroll in the following NHI web-based courses: 135091 Basic Hydraulic Principles Review, 135086 Stream Stability Factors and Concepts, and 135087 Scour at Highway Bridges: Concepts and Definitions. Mastery of these concepts covered in the WBT's will enhance participation in the ILT. All courses are available through NHI website at no charge.
Link to the NHI website: http://www.nhi.fhwa.dot.gov/default.aspx
|
This is Prerequisite For: | NHI course #135048-Countermeasure Design for Bridge Scour and Stream Instability
|
Target Audience: | Federal, State and local highway hydraulic, structural, and geotechnical engineers and bridge inspectors responsible for maintaining the integrity of highway bridges against possible hydraulic related problems. Consultants who do bridge engineering work are encouraged to attend.
|
|
|
Final Exam: | Yes |
 | |