A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Five-year CalTrans freeway project is nearing completion in San Diego
In northern San Diego, the California Department of Transportation (CalTrans) is adding lanes and creating a truck bypass at the Interstate 5/805 junction. A unique portion of this USD 160 million project is the construction of a plantable, geosynthetic-reinforced retaining wall that transforms a simple slope into a vertical face that supports additional lanes of the reconstructed freeway. A two-phased building system allows the attachment of a massive retaining wall, with layers of engineered fill wrapped with high-strength, woven geogrid, to a concrete facing system that protects the exposed geosynthetic while a polypropylene geotextile holds loose plantable topsoil to facilitate vegetative growth. The concrete facing portion of the wall has tiers of headers that extend into the geosynthetically reinforced backfill and stretchers that extend between headers to form the front face of the wall. These stretchers, with the help of non-woven geotextile-bridged gaps between the stretchers, hold in loose topsoil so that vegetation will grow easily at the face of the wall. The tremendous soil forces generated behind the concrete tiers are sustained by layers of geogrids that extend up behind the stretchers and then back into the backfill. The end result is a massive, near-vertical retaining wall more than 21 m high and with a length of 938 m that will be completely vegetated. The project consumed a total of more than 681,422 m2 of geogrid products.
Five-year CalTrans freeway project is nearing completion in San Diego
In northern San Diego, the California Department of Transportation (CalTrans) is adding lanes and creating a truck bypass at the Interstate 5/805 junction. A unique portion of this USD 160 million project is the construction of a plantable, geosynthetic-reinforced retaining wall that transforms a simple slope into a vertical face that supports additional lanes of the reconstructed freeway. A two-phased building system allows the attachment of a massive retaining wall, with layers of engineered fill wrapped with high-strength, woven geogrid, to a concrete facing system that protects the exposed geosynthetic while a polypropylene geotextile holds loose plantable topsoil to facilitate vegetative growth. The concrete facing portion of the wall has tiers of headers that extend into the geosynthetically reinforced backfill and stretchers that extend between headers to form the front face of the wall. These stretchers, with the help of non-woven geotextile-bridged gaps between the stretchers, hold in loose topsoil so that vegetation will grow easily at the face of the wall. The tremendous soil forces generated behind the concrete tiers are sustained by layers of geogrids that extend up behind the stretchers and then back into the backfill. The end result is a massive, near-vertical retaining wall more than 21 m high and with a length of 938 m that will be completely vegetated. The project consumed a total of more than 681,422 m2 of geogrid products.
Five-year CalTrans freeway project is nearing completion in San Diego
San Diego: Straßenbau mit Geokunststoffen
Geosynthetics ; 25 ; 20-24
2007
4 Seiten, 4 Bilder
Article (Journal)
English
British Library Online Contents | 2000
Online Contents | 1997
Limited access postwar project in district X nearing completion
| Engineering Index Backfile | 1946
Bridge at Umhlanga nearing completion
British Library Online Contents | 2001
Prestressed bridge rapidly nearing completion
| Engineering Index Backfile | 1950