Constitutive modeling approach for estimating1-Dheave with respect to time for expansive soils

A two stage model for moisture-induced deformations in expansive soils

“…The model is appropriate for predicting monotonic paths of the above two stress state variables. Adem and Vanapalli (2013) proposed the Modulus of Elasticity Based Method (MEBM) for deformation prediction in similar soils by using a semi-empirical estimation of the modulus of elasticity (Vanapalli and Oh 2010) along with transient changes in soil suction (Wilson 1997). The overestimated vertical displacement in this model is attributed to the one-dimensionality and considering soil suction as the only stress state variable.…”

Evaluating the Effectiveness of Hybrid Geosynthetic Reinforcement System to Mitigate Swelling Distresses on Flexible Pavement Due to Expansive Subgrades

“…Several analytical methods have been suggested by the researchers to estimate the volume change behavior of expansive soils over time (Alonso et al 1999;Briaud et al 2003;Vu and Fredlund 2004;Wray et al 2005;Overton et al 2006;Vu and Fredlund 2006;Adem and Vanapalli 2013). To evaluate the volume change behavior, moisture or suction variation ranges over time and constitutive laws that linked with soil behaviors must be defined (Briaud et al 2003).…”

“…Several researchers tried to predict the volumetric movement of expansive soils analytically (Alonso et al 1999;Briaud et al 2003;Vu and Fredlund 2004;Wray et al 2005;Overton et al 2006;Adem and Vanapalli 2013) and numerically (Vu and Fredlund 2006;Rajeev and Kodikara 2011;Puppala et al 2013;Chittoori et al 2017). Analytical methods of swell prediction are based on moisture/suction variation and constitutive laws that link the soil state variables (Briaud et al 2003).…”

“…Suction-based methods are the most extensive methods to evaluate the soil movement of unsaturated soils (Richards 1965;Lytton and Kher 1970;Fredlund 1997;Fredlund and Hung 2001;Wray et al 2005;Adem and Vanapalli 2013). Soil suction is more efficient than water-based method because of its low sensitivity to soil material variables and convenient relation with soil parameters (Richards 1974).…”

“…Summation of all the node deformations gave the total vertical movement. Adem and Vanapalli (2013) suggested a method based on the modulus of elasticity. This method was developed based on the assumption that the soil is isotropic, linear elastic material, and the influence of the mechanical stress on the volume change of expansive soil underlying lightly loaded structures is insignificant and neglected.…”