Behavior of granular rubber waste tire reinforced soil for application in geosynthetic reinforced soil wall

AbstractLarge quantities of waste tires are released to the environment in an undesirable way. The potential use of this waste material in geotechnical applications can contribute to reducing the tire disposal problem and to improve strength and deformation characteristics of soils. This paper presents a laboratory study on the effect of granular rubber waste tire on the physical properties of a clayey soil. Compaction tests using standard effort and consolidated-drained triaxial tests were run on soil and mixtures. The results conveyed an improvement in the cohesion and the angle of internal friction the clayey soil-granular rubber mixture, depending on the level of confining stress. These mixtures can be used like backfill material in soil retaining walls replacing the clayey soil due to its better strength and shear behavior and low unit weight. A numerical simulation was conducted for geosynthetic reinforced soil wall using the clayey soil and mixture like backfill material to analyzing the influence in this structure.

摘要：大量废旧轮胎以不当方式被排放至自然环境。将这类废弃材料应用于岩土工程领域，既可缓解轮胎处置难题，又可改善土体的强度与变形特性。本文针对废旧轮胎颗粒对黏性土物理特性的影响开展室内试验研究，对纯黏性土及土-橡胶混合物分别开展了标准击实试验与固结排水三轴剪切（consolidated-drained triaxial）试验。试验结果表明，黏性土-废旧轮胎颗粒混合物的黏聚力与内摩擦角均得到提升，且提升效果随围压水平变化。鉴于该混合物具备更优异的强度与剪切特性，且单位自重更低，因此可替代纯黏性土作为挡土墙回填材料。此外，本文还针对以纯黏性土及该混合物作为回填材料的土工合成材料加筋挡土墙（geosynthetic reinforced soil wall）开展了数值模拟，以分析其对该结构的影响。