Retaining Wall - Modular Unit Reinforced Earth Tensar Geogrid Reinforcement, HR-549, 1998

(1998) Retaining Wall - Modular Unit Reinforced Earth Tensar Geogrid Reinforcement, HR-549, 1998. Transportation, Department of


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This research, initiated in October 1992, was located at the intersection of Blairs Ferry Road and Lindale Drive in the City of Marion. The wall is located on the southeast corner of the intersection. Reinforced retaining wall construction started with a five inch base of roadstone with one inch of sand for leveling purposes. One and one-half to two feet of one inch clean stone was placed behind the blocks. A four inch perforated plastic pipe was placed approximately nine inches from the bottom of the one inch clean stone. The Tenswal, tensar geogrid was placed at every third layer. Openings in the Tenswal are hooked over plastic dowels in the blocks. The tenswal reaches from the face of the wall back 5' to 8'. The cost for constructing this wall was $124,400. The wall has performed well for the past five years. The wall improves the aesthetics of a high traffic volume intersection of an urban area. Many positive comments have been received by the city regarding its appearance. The City of Marion has been pleased with the wall and has used this type of wall on subsequent projects.

Item Type: Departmental Report
Keywords: Aesthetics, Geogrids, Plastic pipe, Reinforced concrete retaining walls, Retaining walls, Traffic volume
Subjects: Transportation
Transportation > Materials
Transportation > Roads and highways
Transportation > Traffic safety
Transportation > Research
Transportation > Design and Construction
ID Code: 17294
Deposited By: Iowa DOT Library
Deposited On: 30 Jun 2014 12:37
Last Modified: 29 Jan 2015 21:10