Friction characteristics of organic soil with construction materials

The shaft friction degradation of piles under cyclic axial loading in wind turbine foundations.

“…DeJong and Westgate (2009) noticed a secondary effect of the particle breakage depending on particle hardness, stress levels and total interface displacement. Canakci et al (2016) noticed that the shape of sand particles immersed in an organic soil (sand content less than 40%) had not affected the interface strength. Further investigation is needed in order to evaluate the complete role of particle characteristics on the interface behavior and strength, especially for plastic soils.…”

“…Several authors noticed an increase in the interface strength as the normal stress increased (Gómez et al, 2008;Tiwari and Al-Adhadh, 2014;Chen et al, 2015;Canakci et al, 2016). As the confining stress increases, the interface dilation decreased and the soil mass became more contractile (Jardine et al, 1993;Tabucanon et al, 1995;Dietz and Lings, 2006;DeJong and Westgate, 2009;Di Donna et al, 2015;Tehrani et al, 2016).…”

“…Mohr-Coulomb failure criterion (Jardine et al, 1993;Paikowsky et al, 1995;Chu and Yin, 2006;Dietz and Lings, 2006;DeJong and Westgate, 2009;Taha and Fall, 2013;Chen et al, 2015;Canakci et al, 2016).…”

“…Several researchers studied the effects of soil moisture content on the interface response (Potyondy, 1961;Kim and O'Neill, 1998;Chu and Yin, 2006;Miller and Hamid, 2006;Gómez et al, 2008;Hamid and Miller, 2009;Taha and Fall, 2013;Tiwari and Al-Adhadh, 2014;Hossain and Yin, 2014;Borana et al, 2016;Canakci et al, 2016;Liang et al, 2016). For example, Gómez et al (2008) and Tiwari and Al-Adhadh (2014) noticed that sandsolid interface exhibited similar pattern in the stress-displacement behavior for dry and saturated specimens.…”

“…However, dry soil conditions exhibited higher interface strength compared to the saturated soil (Tiwari and Al-Adhadh, 2014). Taha and Fall (2013) and Canakci et al (2016) evaluated the interface behavior and strength for different water contents for a marine clay and an organic soil, respectively. Kim and O'Neill (1998) related the effects of seasonal moisture content changes in the soil on the shaft friction capacity of a drilled shaft.…”