Numerical analysis of reinforced wall using rubber tire chips–sand mixtures as backfill material

Abstract Scrap tires are undesired urban waste and the volume is increasing every year. One of the possible utilization of this waste is to use it as shredded tires alone or mix it with soil as lightweight backfill materials. This paper presents the state-dependent constitutive model for rubber tire chips and rubber tire chip–sand mixtures and its successful implementation into a numerical analysis (FLAC) program. The implemented model was verified by simulation of the stress–strain characteristics of rubber tire chip–sand mixtures in triaxial testing. Furthermore, the numerical simulations as well as the parametric studies of the effects of the reinforcement stiffness and interface shear stiffness on the behavior of the reinforced wall have been performed. With increasing reinforcement stiffness, the lateral deformation decreased, while the tensile force in the reinforcement increased. Moreover, with increasing shear stiffness at the interface, the tensile force in the reinforcement increased, while the lateral deformation of the reinforced wall decreased.

[1]  Yannis F. Dafalias,et al.  Dilatancy for cohesionless soils , 2000 .

[2]  Simon J. Wheeler,et al.  Influence of compaction procedure on the mechanical behaviour of an unsaturated compacted clay, Part 1: Wetting and Isotropic Compression , 2000 .

[3]  Robert F. Cauley,et al.  TRIAXIAL DETERMINATION OF SHEAR STRENGTH OF TIRE CHIPS. TECHNICAL NOTE , 1997 .

[4]  D. T. Bergado,et al.  The interaction mechanism and behavior of hexagonal wire mesh reinforced embankment with silty sand backfill on soft clay , 2003 .

[5]  R. Bathurst,et al.  Behaviour of geosynthetic reinforced soil retaining walls using the finite element method , 1995 .

[6]  C. Benson,et al.  Interaction Between Reinforcing Geosynthetics and Soil-Tire Chip Mixtures , 1998 .

[7]  Dana N. Humphrey,et al.  Tire Shreds as Lightweight Retaining Wall Backfill: Active Conditions , 1998 .

[8]  Mike Jefferies,et al.  NOR-SAND: A SIMPLE CRITICAL STATE MODEL FOR SAND , 1993 .

[9]  D. Muir Wood,et al.  Strain softening and state parameter for sand modelling , 1994 .

[10]  Rodrigo Salgado,et al.  Shredded Tires and Rubber-Sand as Lightweight Backfill , 1999 .

[11]  R. Lewis,et al.  Associated and non-associated visco-plasticity and plasticity in soil mechanics , 1975 .

[12]  Yannis F. Dafalias,et al.  BOUNDING SURFACE PLASTICITY, I: MATHEMATICAL FOUNDATION AND HYPOPLASTICITY , 1986 .

[13]  A. Schofield,et al.  On The Yielding of Soils , 1958 .

[14]  R. Kerry Rowe,et al.  Predicted Behavior of Two Centrifugal Model Soil Walls , 1994 .

[15]  Madhira R. Madhav,et al.  Pullout test model for extensible reinforcement , 1999 .

[16]  Dennes T. Bergado,et al.  Strength and deformation characteristics of shredded rubber tire - sand mixtures , 2003 .

[17]  Ken Been,et al.  Implications for critical state theory from isotropic compression of sand , 2000 .

[18]  D. T. Bergado,et al.  Finite element modeling of hexagonal wire reinforced embankment on soft clay , 2000 .

[19]  S. K. Ho,et al.  Horizontal deformation in reinforced soil walls , 1998 .

[20]  Ken Been,et al.  A STATE PARAMETER FOR SANDS , 1985 .

[21]  R A Lohnes,et al.  Mechanical Properties of Shredded Tires , 2002 .

[22]  Peter J. Bosscher,et al.  Design of Highway Embankments Using Tire Chips , 1997 .

[23]  T. Edil,et al.  ENGINEERING PROPERTIES OF TIRE CHIPS AND SOIL MIXTURES , 1994 .

[24]  Gary J. Foose,et al.  Sand Reinforced with Shredded Waste Tires , 1996 .

[25]  S. K. Ho,et al.  Continuous Panel Reinforced Soil Walls on Rigid Foundations , 1997 .

[26]  I. Lee,et al.  Soil mechanics: Selected topics; , 1968 .

[27]  K. C. Yeo,et al.  Finite element modelling of pull-out tests with load and strain measurements , 1994 .