A perimeter ring road is being constructed around the City of Edmonton that is referred to as Anthony Henday Drive. Funding for the project is being provided by Alberta Transportation. The ring road alignment includes a crossing of the North Saskatchewan River in the southwest corner of the city. A 360 m long bridge was proposed for crossing the North Saskatchewan River. The short-term design for the crossing included two lanes in each direction with an ultimate design of eight lanes. Significant approach fills for the proposed bridge structures were required on both sides of the river. Based on the proposed vertical alignment, the maximum difference in height from the crest of fill to river level was approximately 35 m on the west side and 28 m on the east side. The width of the embankment at the crest is approximately 55 m, with sideslopes of 4H:1V. This equates to a footprint width of approximately 200 m on the floodplain that is present along the east side. Headslope angles for the embankments of 3H:1V were proposed, with a minimum setback of 20 m, for environmental considerations, from the crest of the riverbank to the toe of the approach fill. The primary focus of this paper is the approach fill design for the east side of the river. For teh covering abstract of this conference see ITRD number E217481.
Abstract