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A platform for research: civil engineering, architecture and urbanism
Development of Socketed Foundations for S3x5.7 Posts
The objective of this study was to develop a socketed foundation for use with the S3x5.7 (S76x8.5) weak post. The design focused on cylindrical, reinforced concrete foundations with a steel tube placed in the center for use as the socket. The foundation was to prevent both damage and displacements exceeding 1 in. (25 mm), as measured at groundline, during an impact event. To evaluate various foundation designs, ten dynamic bogie tests were conducted over three separate rounds of testing. Round 1 was conducted in a weak, sandy soil; Round 2 was conducted in a strong, stiff soil; and Round 3 was conducted within a 4-in. (102-mm) thick asphalt pad. The results of the bogie testing led to the development of three socketed foundation design options. Option 1 consisted of a 12-in. (305-mm) diameter foundation; Option 2 was a 15-in. (381-mm) diameter foundation; and Option 3 was a foundation installed within an asphalt mow strip. Option 1 carried a risk of concrete damage during severe impacts, but it was included for those agencies wishing to be more aggressive and accept the risks of damage. Each design option had a unique reinforcement configuration and minimum embedment depth. Further, the recommended minimum embedment depths were also a function of the surrounding soil conditions and the frost line depth of the installation site.
Development of Socketed Foundations for S3x5.7 Posts
The objective of this study was to develop a socketed foundation for use with the S3x5.7 (S76x8.5) weak post. The design focused on cylindrical, reinforced concrete foundations with a steel tube placed in the center for use as the socket. The foundation was to prevent both damage and displacements exceeding 1 in. (25 mm), as measured at groundline, during an impact event. To evaluate various foundation designs, ten dynamic bogie tests were conducted over three separate rounds of testing. Round 1 was conducted in a weak, sandy soil; Round 2 was conducted in a strong, stiff soil; and Round 3 was conducted within a 4-in. (102-mm) thick asphalt pad. The results of the bogie testing led to the development of three socketed foundation design options. Option 1 consisted of a 12-in. (305-mm) diameter foundation; Option 2 was a 15-in. (381-mm) diameter foundation; and Option 3 was a foundation installed within an asphalt mow strip. Option 1 carried a risk of concrete damage during severe impacts, but it was included for those agencies wishing to be more aggressive and accept the risks of damage. Each design option had a unique reinforcement configuration and minimum embedment depth. Further, the recommended minimum embedment depths were also a function of the surrounding soil conditions and the frost line depth of the installation site.
Development of Socketed Foundations for S3x5.7 Posts
S. K. Rosenbaugh (author) / T. L. Schmidt (author) / R. K. Faller (author) / J. D. Reid (author)
2015
155 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Transportation Safety , Road Transportation , Socketed posts , Concrete footing , Cables , Concrete foundations , Appurtenances , Bogie tests , Cylindrical foundations , Roadside appurtances , Configurations , Impact testing , Highway safety , Roadside safety
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