Constitutive modeling approach for estimating 1-D heave with respect to time for expansive soils

Abstract Many studies are reported in the literature for estimating the potential heave of expansive soils; however, limited efforts have been directed towards estimating the heave with respect to time. In this Technical Note, a simple approach is proposed for estimation of the one-dimensional (1-D) heave of expansive soils over time. The approach involves integrating semi-empirical and numerical techniques into a unified method to estimate heave in response to the net changes in soil suction within the active zone. The information of the variation of modulus of elasticity with respect to suction is introduced into the soil structure constitutive equation proposed by Fredlund and Morgenstern (1976) to estimate the soil heave over time. The commercial software VADOSE/W, a product of Geo-Studio, is used as a tool to estimate the net changes in the soil suction. The approach is tested using the published results by Vu and Fredlund (2006) for Regina expansive clay. The estimated results of the proposed approach agree well with the published data in terms of both the total heave variations and matric suction changes in the soil. The proposed method is promising and can be used in engineering practice for estimation of the 1-D heave with respect to time.

[1]  E. Yanful,et al.  Prediction of the water balance of two soil cover systems , 2007 .

[2]  Stephen Fityus,et al.  Expansive Soil Test Site Near Newcastle , 2004 .

[3]  P. Milly.  Moisture and heat transport in hysteretic, inhomogeneous porous media: A matric head‐based formulation and a numerical model , 1982 .

[4]  Werner S. Weiglhofer.  Constitutive relations , 2002, SPIE Optics + Photonics.

[5]  R. Ching,et al.  A Small Saskatchewan Town Copes with Swelling Clay Problems , 1984 .

[6]  D. Fredlund,et al.  Challenges to modelling heave in expansive soils , 2006 .

[7]  L. Blair.  A prediction. , 1995, Hospitals & health networks.

[8]  Van Genuchten,et al.  A closed-form equation for predicting the hydraulic conductivity of unsaturated soils , 1980 .

[9]  Anand J. Puppala,et al.  Semi-empirical model for the prediction of modulus of elasticity for unsaturated soils , 2009 .

[10]  Snethen,et al.  PREDICTION OF POTENTIAL HEAVE OF SWELLING SOIL , 1978 .

[11]  Lawrence D. Johnson.  Influence of suction on heave of expansive soils , 1973 .

[12]  Delwyn G. Fredlund,et al.  Constitutive relations for volume change in unsaturated soils , 1976 .

[13]  John D. Nelson,et al.  Design Procedure and Considerations for Piers in Expansive Soils , 2012 .

[14]  V. Q. Hung.  Uncoupled and coupled solutions of volume change problems in expansive soils , 2002 .

[15]  Charles Wang Wai Ng,et al.  Performance of an unsaturated expansive soil slope subjected to artificial rainfall infiltration , 2003 .

[16]  A. Puppala,et al.  Heave Distress Problems in Chemically-Treated Sulfate-Laden Materials , 2009 .

[17]  A. Dhowian,et al.  Swell behaviour of arid climate shales from Saudi Arabia , 1990, Quarterly Journal of Engineering Geology.

[18]  Fangsheng Shuai,et al.  Simulation of swelling pressure measurements on expansive soils , 1998 .

[19]  Jd Nelson,et al.  Prediction of Floor Slab Heave , 1984 .

[20]  L. A. Richards.  Capillary conduction of liquids through porous mediums , 1931 .

[21]  Jean-Louis Briaud,et al.  SHRINK TEST--WATER CONTENT METHOD FOR SHRINK AND SWELL PREDICTIONS , 2003 .

[22]  S. Vanapalli,et al.  A state-of-the art review of 1-D heave prediction methods for expansive soils , 2012 .

[23]  D. Cameron,et al.  SEASONAL HEAVE OF CLAY SOILS , 1981 .

[24]  D. D. Overton,et al.  Time Rate of Heave Prediction for Expansive Soils , 2006 .

[25]  Xiong Zhang,et al.  Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils , 2005 .

[26]  Sai K. Vanapalli,et al.  A model for predicting the modulus of elasticity of unsaturated soils using the soil-water characteristic curve , 2010 .

[27]  Delwyn G. Fredlund,et al.  The Prediction of Total Heave , 1980 .

[28]  G. Wilson.  Soil evaporative fluxes for geotechnical engineering problems , 1990 .