The Effect of Abutment Length for Abutment Scour in Cohesive Soil: Initial Results

Influence of cohesion on scour around submerged dike founded in clay–sand–gravel mixtures

“…Garde et al (1961), Gill (1972), Kothyari and Ranga Raju (2001), Thompson (2002), Ettema and Muste (2004), Ezzeldin et al (2007), Nasrollahi et al (2008), Fazli et al (2008), Ghodsian and Vaghefi (2009), Vaghefi et al (2009), Masjedi and Foroushani (2012) and Rashedipoor et al (2012) etc. Similarly, the experimental studies for the prediction of scour depth around submerged dike have been carried out by Kuhnle et al (1999Kuhnle et al ( , 2002, Elawady et al (2001), Rodrigue-Gervais et al (2011), etc. Only few studies have been conducted on scour around abutment embedded in cohesive sediment mixture consisting of clay, silt, and sand by Molinas and Reiad (1999), Oh et al (2007), Chen (2008), Abou-seida et al (2012), Mohammadpour et al (2013) and Debnath et al (2014) etc. Some previous studies related to present study are reviewed here.…”

“…It was found that the maximum scour depth decreases with an increase of clay fraction and degree of compaction. Oh et al (2007) conducted several experiments to study the effect of length of wing-wall-shaped abutment on scour depth in cohesive soil under clear water condition using Porcelain clay having median particle size d 50 = 0.003 mm, plasticity index (PI) = 14%, critical velocity (v c ) = 0.95 m/s and critical shear stress (τ c ) = 1.7 N/m 2 . From the experimental results, it was observed that the location of scour hole was at middle of the section or slightly downstream of the abutment.…”