Simplified method for estimating future scour depth at existing bridges

Content Provider	Semantic Scholar
Author	Govindasamy, A. V.
Copyright Year	2009
Abstract	Simplified Method for Estimating Future Scour Depth at Existing Bridges. (May 2009) Anand V Govindasamy B.Eng., Universiti Sains Malaysia, Pulau Pinang, Malaysia; M.Eng., Asian Institute of Technology, Bangkok, Thailand Chair of Advisory Committee: Dr. Jean-Louis Briaud Bridge scour is the term which describes the erosion of soil surrounding a bridge foundation due to water. Bridge scour can cause the reduction of the load carrying capacity of bridge foundations, excessive foundation settlements, and damage to bridge abutments. Bridges with foundations that are unstable for calculated and/or observed scour conditions are termed scour critical bridges. Approximately 25,000 bridges in the United States are classified as scour critical and about 600 of them are in Texas. This designation comes in part from the use of over-conservative methods that predict excessive scour depths in erosion resistant materials. Other methods have been developed to eliminate this over-conservatism but are uneconomical because they require site-specific erosion testing. The major contribution of this dissertation is a new method to assess a bridge for scour and erosion classification charts which categorizes the erodibility of geomaterials according to conventional engineering properties. The new method is a three level Bridge Scour Assessment (BSA) procedure which is relatively simple and economical. It does not require site-specific erosion testing and eliminates the over-conservatism in
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Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article