Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Creep of backfill geogrid reinforcement for retaining walls
This study addresses the creep and creep-rupture investigation for two types of geogrids: High Density Polyethylene (HDPE) and Polythylene Terephthalate (PET). Accelerated exposure was used, with super-ambient temperatures for different simulated exposure conditions, and soil water related to the soil conditions in Florida. The temperatures were: 30 deg C, 45 deg C, 55 deg C, and 65 deg C; with submergence in the following groundwater-simulating solutions: HDPE specimens - calcareous (pH 9.0), phosphate (pH 4.5), limerock, seawater, and freshwater for PET specimens only. The load levels were 30 %, 40 %, 50 % of the ultimate load value. Elongations were measured at 30 seconds, 1, 2, 4, 6, 8, 15, 30, 75 minutes, 3, 7 hours and every 24 hours, up to 10000 hours. It was observed that HDPE geogrids undergo larger creep than PET geogrids. The different exposures do not play an important role in the rate of creep. Creep rupture occurred in all the HDPE specimens exposed to 50 % of the ultimate load, and for the specimens exposed to 40 % of the ultimate load, and to 55 deg C and 65 deg C temperatures. The PET specimens did not experience creep rupture except for two specimens; for these two cases the rupture was attributed to either defects in the specimens or defective clamping.
Creep of backfill geogrid reinforcement for retaining walls
This study addresses the creep and creep-rupture investigation for two types of geogrids: High Density Polyethylene (HDPE) and Polythylene Terephthalate (PET). Accelerated exposure was used, with super-ambient temperatures for different simulated exposure conditions, and soil water related to the soil conditions in Florida. The temperatures were: 30 deg C, 45 deg C, 55 deg C, and 65 deg C; with submergence in the following groundwater-simulating solutions: HDPE specimens - calcareous (pH 9.0), phosphate (pH 4.5), limerock, seawater, and freshwater for PET specimens only. The load levels were 30 %, 40 %, 50 % of the ultimate load value. Elongations were measured at 30 seconds, 1, 2, 4, 6, 8, 15, 30, 75 minutes, 3, 7 hours and every 24 hours, up to 10000 hours. It was observed that HDPE geogrids undergo larger creep than PET geogrids. The different exposures do not play an important role in the rate of creep. Creep rupture occurred in all the HDPE specimens exposed to 50 % of the ultimate load, and for the specimens exposed to 40 % of the ultimate load, and to 55 deg C and 65 deg C temperatures. The PET specimens did not experience creep rupture except for two specimens; for these two cases the rupture was attributed to either defects in the specimens or defective clamping.
Creep of backfill geogrid reinforcement for retaining walls
Kriechverhalten von Gitterstoff zur Verstärkung der Hinterfüllung von Stützmauern
Navarrete, F. (Autor:in) / Reddy, D.V. (Autor:in) / Lai, P. (Autor:in)
2000
4 Seiten, 5 Bilder, 11 Tabellen, 7 Quellen
Aufsatz (Konferenz)
Englisch
CREEP OF BACKFILL GEOGRID REINFORCEMENT FOR RETAINING WALLS
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Pull-out of backfill geogrid reinforcement for retaining walls
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PULL-OUT OF BACKFILL GEOGRID REINFORCEMENT FOR RETAINING WALLS
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STRENGTH AND DURABILITY OF BACKFILL GEOGRID REINFORCEMENT FOR RETAINING WALLS
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Model retaining wall with geogrid reinforced backfill
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