Application of Lime and Nano Lime in Control of Failure in Side Slope of Earth Channel

Instability of earth slopes in open channels have been always considered by hydraulic engineering. In present study, application of lime and nano lime in control of failure in side slope of earth channel has been investigated experimentally. Results showed, lining of 20% lime and 5% nano lime, increased angle of internal friction 24.4% and 35.5%, respectively and cohesion reached a value of 3.3 kPa. In feeding, for slopes of 26.5, 33, 45 and 53 degree failure occured in water levels of 560 mm, 460 mm, 460 mm and 410 mm, respectively. For seepage situation, slope of 26.5 degree was stable and slopes of 33 and 45 became instable in water level of 510 mm. Slopes of 45 degree with 10% lime and 53 degree with 20% lime were stable in maximum level of 660 mm. Potential variation behind the slope showed curve procedure with lime percent. Lining of side slop with lime and nano lime decreased seepage discharge in same water level. Also, application of lime and nano lime changed shape of failure zone and using nano lime decreased cracks in size. In feeding, without and with lime lining, curved failure surface and crack observed on slope.