A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geocell, grid, and reinforced-soil in restoring eroded steep slopes
In October 2003, stormwater overflows from an intense, short-duration storm eroded approximately 20,000 yds3 of soil from the bottom and side slopes of a ravine between the Tacoma Narrows Bridge near Tacoma, Wash. The erosion ruptured two storm drains and left undermined slopes that continued to ravel and retreat. Measures were implemented to help stabilize the eroded slopes and prevent further retreat that could affect the Tacoma Narrows Bridge expansion project and a residence above the opposite ravine slope. The measures also addressed regulatory agency concerns about sediment-laden water discharging from the ravine into the Narrows that could damage sensitive sand lance habitat on the beach at the mouth of the ravine. Ravine restoration measures consisted of constructing unreinforced soil, flexible geocell-faced reinforced soil, and geocell-geogrid reinforced soil slopes that mimic the former steep ravine. After slope construction, a mixture of drought tolerant and native vegetation was planted to provide erosion protection and restore the natural ravine environment. The geocells had the flexibility to fit against, and transition between variable slopes and create steep slopes with planting benches for trees, pockets for smaller plants, and terraces that slow stormwater runoff. The geocell ravine repair design was an effective, economical solution that saved the client the cost of potential litigation, satisfied regulatory requirements, and expedited construction, which was completed in less than 5 months.
Geocell, grid, and reinforced-soil in restoring eroded steep slopes
In October 2003, stormwater overflows from an intense, short-duration storm eroded approximately 20,000 yds3 of soil from the bottom and side slopes of a ravine between the Tacoma Narrows Bridge near Tacoma, Wash. The erosion ruptured two storm drains and left undermined slopes that continued to ravel and retreat. Measures were implemented to help stabilize the eroded slopes and prevent further retreat that could affect the Tacoma Narrows Bridge expansion project and a residence above the opposite ravine slope. The measures also addressed regulatory agency concerns about sediment-laden water discharging from the ravine into the Narrows that could damage sensitive sand lance habitat on the beach at the mouth of the ravine. Ravine restoration measures consisted of constructing unreinforced soil, flexible geocell-faced reinforced soil, and geocell-geogrid reinforced soil slopes that mimic the former steep ravine. After slope construction, a mixture of drought tolerant and native vegetation was planted to provide erosion protection and restore the natural ravine environment. The geocells had the flexibility to fit against, and transition between variable slopes and create steep slopes with planting benches for trees, pockets for smaller plants, and terraces that slow stormwater runoff. The geocell ravine repair design was an effective, economical solution that saved the client the cost of potential litigation, satisfied regulatory requirements, and expedited construction, which was completed in less than 5 months.
Geocell, grid, and reinforced-soil in restoring eroded steep slopes
Geokunststoffe und verstärkter Boden in der Rekonstruktion von erodierten steilen Böschungen
Boyle, Stan (author) / Robertson, Kathy (author)
Geosynthetics ; 25 ; 20-26
2007
6 Seiten, 9 Bilder, 1 Tabelle
Article (Journal)
English
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