Seismic Response of Geocell Retaining Walls: Experimental Studies

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Abstract
This paper summarizes the seismic response of five large-scale retaining walls having a geocell facing. The walls were 2.8 m high and the backfill and foundation soil were a fine sand compacted to 90% standard Proctor density (relative density of 55%). The first two walls were of the same geometry, with a tapered facing made of geocells each of height 20 cm , one infilled with gravel and the other with sand. In Wall 3, a facing of depth 60 cm was constructed while the backfill sand was reinforced with a polyester geogrid. Wall 4 was similar to Wall 3 except that the backfill was reinforced with several geocell layers. Wall 5 had thin geocell layers of 5 cm height as reinforcements in order to improve the performance compared with Wall 4. The walls were subjected to the scaled horizontal and vertical motions as recorded during the 1995 Kobe earthquake, 4.5 m∕ s2 (450 gal) and 9.0 m∕ s2 (900 gal) maximum horizontal accelerations in the first and second excitations, respectively. In an attempt to induce fail...

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