关键词: 废轮胎, 加筋土壤, 拉拔试验

Abstract:

Since tire have characteristics of extremely high strength and high durability, using the waste tires to adopt as the reinforced element in the reinforced structure will be a good application to treat the waste tires. Pullout resistant behavior is the major topic to be evaluated in this reinforcement application. Since the 3D geometry of tire is different from traditional planar geosynthetics (such as geotextiles and geogrids), the boundary condition and interface interaction are also be different from current theoretical models. To evaluate the performance of waste tire as reinforcing element, the large size of pullout test system is therefore to be need in this study. Tires with and without one side wall cut are tested and compared in this study for their performances. Flexible materials were also used in this study to eliminate the extrusion of filled sands caused by front wall effects. After the front wall effects has been successful studied and controlled, the test results showed the cut-tire provide better compaction performance of filled sands and increase the area subjected to normal stress. It exhibits the significantly better pullout resistance than the reinforced soil mass with the tire without cut. When the cut-tire to reduce the side of bead wire, it results the larger deformation than tire without cut. To evaluate the reinforcing effect of two connected tires, the tensile elongation from the inter-zone of two tires is the major influence. Needs to restrain the tire deformation by lower elongation materials and rigid clips for connection. The findings provide some better knowledge to adopt the waste tires in reinforced earth application. In addition, from the results observation, significant settlement may be occurred during reinforcement construction process. This will be also a important consideration for the design approach.

Key words: waste tire, reinforced soil, pullout test