Performance of Counterfort Walls with Reinforced Granular and Fly Ash Backfills: Experimental Investigation |
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Authors: | Sutapa Hazra Nihar Ranjan Patra |
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Institution: | (1) Department of Civil Engineering, Indian Institute of Technology, Kanpur, 208016, UP, India |
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Abstract: | Experimental investigations on model counterfort retaining walls have been carried out to study the lateral movement of the
walls and the nature of the failure modes. Mild steel plates of size 1,000 × 900 × 8 mm were used as model retaining walls
and were placed in a tank of size 900 × 900 × 670 mm. Ennore sand, obtained from Madras India, and Fly ash, obtained from
Panki Thermal Power Plant, India were used as backfill material. Tests were carried out both with and without reinforced backfill.
Two types of loading conditions were applied: (i) line load and (ii) uniform surcharge. The shape and size of the failure
wedge was studied by observing displacement of bands of colored through a Perspex plate fixed on one side of the tank. Plots
of overturning moment against the rotation of a wall top show that with the increase in rotation of wall, the overturning
moment decreases. The minimum value of overturning moment is taken as the limiting value. The failure surfaces obtained in
different cases are linear and parabolic in shape. |
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Keywords: | Lateral movement Failure mode Overturning moment Ennore sand Fly ash |
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