A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Utilizing geotextiles in highway bridge approach embankments
AbstractGeotextiles have been employed to reduce lateral deformation of bridge approach embankments and to prevent closure of the expansion devices in the bridges. This unique application of geotextile materials has been successfully used by the Wyoming Highway Department for several years. The concept has recently been modified by eliminating the lateral pressure on the abutment wall. This is achieved by creating a free standing geotextile supported wall. This concept will be implemented in an existing bridge undergoing reconstruction. Problems concerning the retrofit design and construction are discussed. A laboratory testing program has been developed to obtain the deformational characteristics of the soil-geotextile composite. The significant findings are: (1) Lateral deformations of 80–150 mm are required for the geotextile to totally support the soil. The range is dependent on the initial tension of the geotextile during forming. Once the free standing face has been developed, subsequent loading produces only minor additional lateral deformations.(2) Preliminary testing indicates for a fixed lift height, the amount of deformation required to reduce the lateral stresses by specified amounts can be predicted.(3) Common plastic foams do not appear to provide sufficient flexibility to reduce the lateral stress developed on abutment walls.
Utilizing geotextiles in highway bridge approach embankments
AbstractGeotextiles have been employed to reduce lateral deformation of bridge approach embankments and to prevent closure of the expansion devices in the bridges. This unique application of geotextile materials has been successfully used by the Wyoming Highway Department for several years. The concept has recently been modified by eliminating the lateral pressure on the abutment wall. This is achieved by creating a free standing geotextile supported wall. This concept will be implemented in an existing bridge undergoing reconstruction. Problems concerning the retrofit design and construction are discussed. A laboratory testing program has been developed to obtain the deformational characteristics of the soil-geotextile composite. The significant findings are: (1) Lateral deformations of 80–150 mm are required for the geotextile to totally support the soil. The range is dependent on the initial tension of the geotextile during forming. Once the free standing face has been developed, subsequent loading produces only minor additional lateral deformations.(2) Preliminary testing indicates for a fixed lift height, the amount of deformation required to reduce the lateral stresses by specified amounts can be predicted.(3) Common plastic foams do not appear to provide sufficient flexibility to reduce the lateral stress developed on abutment walls.
Utilizing geotextiles in highway bridge approach embankments
Edgar, Thomas V. (author) / Puckett, Jay A. (author) / Sherman, William F. (author) / Groom, Jeffrey L. (author)
Geotextiles and Geomembranes ; 5 ; 3-16
1986-09-08
14 pages
Article (Journal)
Electronic Resource
English
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