Project 0-4695

Guidance for Design in Areas of Extreme Bed-Load Mobility

road damage

This project investigated the mobility of gravel to cobble sized materials in Texas streams on the Edwards Plateau. TxDOT uses low-water crossings for many of the roadways in the region, particularly where the streams are ephemeral. When the streambed mobilizes, instances of roadway loss of service, either by deposition of large amounts of bed materials or by structural failure associated with streambed mobilization, are relatively common. The objectives of the project were to determine the mechanics of streambed mobilization and develop design guidelines (approaches) to mitigate damage associated with streambed mobilization events. Numerical models were developed and a GIS approach was used to demonstrate how areas subject to streambed mobilization can be identified through application of these tools. Physical models were used to demonstrate the mechanics of streambed mobilization and test current design solutions.

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Contact Information

Theodore Cleveland, Ph.D., P.E.
Department of Civil and Environmental Engineering
Texas Tech University
Lubbock, TX 79409-1022

Tel:(806) 834-5101
Fax: (806) 742-3449