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Field Observations and Evaluations of Streambed Scour at Bridges

  


by Filed under civil engineering

Field Observations and Evaluations of Streambed Scour at Bridges

TOC

CHAPTER 1:  INTRODUCTION
PURPOSE AND SCOPE

CHAPTER 2: COMPONENTS OF SCOUR AT BRIDGES
AGGRADATION AND DEGRADATION
SHORT-TERM SCOUR AND FILL
GENERAL SCOUR
CONTRACTION SCOUR
LOCAL SCOUR

CHAPTER 3:  DESCRIPTION OF FIELD METHODS
LIMITED-DETAIL DATA
DETAILED DATA

CHAPTER 4:  ENHANCEMENTS TO THE BRIDGE SCOUR

DATA MANAGEMENT SYSTEM

CHAPTER 5:  LOCAL SCOUR AT PIERS
SUMMARY OF FIELD DATA
EVALUATION OF PUBLISHED EQUATIONS
Discussion of Equations
Assumptions
Comparison of Predictions with Field Data

EVALUATION OF LABORATORY RESEARCH
Pier Geometry
Relative Velocity
Bed Material Parameters
Depth of Approach Flow
DEVELOPMENT OF SCOUR PREDICTION METHODOLOGY
Assessment of Basic Variables
Assessment of Current Methodology
Development of New Methodology
Importance of Sampling Bed Material

CHAPTER 6:  SCOUR CAUSED BY FLOW CONTRACTION AT BRIDGES DISCUSSION OF PREDICTIVE EQUATIONS
Contraction Scour
Live Bed Contraction Scour Equations
Clear Water Contraction Scour Equations
Abutment Scour
Field Conditions
Discussion of Equations

EVALUATION OF PUBLISHED FIELD OBSERVATIONS

ANALYSIS OF REAL-TIME DATA
U.S. Route 12 over the Pomme de Terre River
Site Description
Discussion of Field Data
Model Calibration
Assessment of Scour Computations
Swift County Route 22 over the Pomme de Terre River
Site Description
Discussion of Field Data
Model Calibration
Assessment of Scour Computations

CHAPTER 7:  SUMMARY AND CONCLUSIONS

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