Effects of Gradation and Cohesion on Bridge Scour. Volume 6. Abutment Scour in211 Uniform and Stratified Sand Mixtures

摘要

The main cause of bridge failures built across rivers is attributed to the211u001eproblem of scour around bridge abutments and piers. In this experimental study, 211u001escour around abutments is investigated in detail to achieve two main objectives. 211u001eFirst objective is to describe the process of local scour at vertical wall 211u001eabutments, and to introduce a more physically-based approach to predict the 211u001emaximum scour depth. Second objective is to investigate and describe the process 211u001eof local scour in stratified cohesionless bed material, and to relate it to local 211u001escour taking place in homogeneous environment.