A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Environmentally friendly reinforced soil systems
When the Minnesota Department of Transportation decided to replace the existing 38 year old Interstate 35E Bridge over the Mississippi River in St. Paul, right of way constraints required the construction of a large retaining wall along the southbound approach embankment. The wall was necessary to provide additional embankment width for an extra highway lane and safety shoulder, while minimizing impacts to a stream located at the base of the embankment. A cast-in-place concrete wall, or even a concrete modular block wall, was considered visually and aesthetically unappealing considering the environmentally sensitive location. They wanted a vegetated wall. A conventional reinforced soil slope (RSS) System was not pursued due to concerns about potential vegetation facing instability on the steepened slope. After discussions officials decided on a hybrid mechanically stabilized earth (MSE) system consisting of a lower, gabion-faced, Terramesh wall and an upper, vegetated-faced, Green Terramesh reinforced soil slope. Both structures employ traditional MSE construction, taking advantage of the additional engineered fill required for a widening of the embankment. The reinforced soil structure has a total combined height of slightly more than 17.5 m, with a length of about 344 m. The gabion-faced wall is set back a little more than 0.35 m per each 1 m height interval, forming a batter of 19.3 deg. The slope face is battered at 30 deg from vertical.
Environmentally friendly reinforced soil systems
When the Minnesota Department of Transportation decided to replace the existing 38 year old Interstate 35E Bridge over the Mississippi River in St. Paul, right of way constraints required the construction of a large retaining wall along the southbound approach embankment. The wall was necessary to provide additional embankment width for an extra highway lane and safety shoulder, while minimizing impacts to a stream located at the base of the embankment. A cast-in-place concrete wall, or even a concrete modular block wall, was considered visually and aesthetically unappealing considering the environmentally sensitive location. They wanted a vegetated wall. A conventional reinforced soil slope (RSS) System was not pursued due to concerns about potential vegetation facing instability on the steepened slope. After discussions officials decided on a hybrid mechanically stabilized earth (MSE) system consisting of a lower, gabion-faced, Terramesh wall and an upper, vegetated-faced, Green Terramesh reinforced soil slope. Both structures employ traditional MSE construction, taking advantage of the additional engineered fill required for a widening of the embankment. The reinforced soil structure has a total combined height of slightly more than 17.5 m, with a length of about 344 m. The gabion-faced wall is set back a little more than 0.35 m per each 1 m height interval, forming a batter of 19.3 deg. The slope face is battered at 30 deg from vertical.
Environmentally friendly reinforced soil systems
Umweltfreundliche Systeme für den Böschungsbau
Reuter, G. (author) / Wright, G. (author)
2003
3 Seiten, 3 Bilder
Article (Journal)
English
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