廢輪胎加勁土結構之拉出行為與力學分析研究

廢輪胎所造成的環境污染問題仍為21世紀所關注的，因輪胎的原料所具有的高強度與耐久特性，使許多學者投入於再利用特性的相關研究。於此研究乃提出新的處理概念，是以輪胎作為加勁土壤結構物的加勁單元，並以顆粒影像分析模型試驗與拉出試驗來評估其拉出阻抗行為。由於輪胎為一立體結構材料，其所造成的邊界影響將不同於普遍使用的平面式地工織物與地工格網，藉由柔性前壁將可有效改善砂土擠壓所造成的前壁效應。以完整和切割一側胎的輪胎進行拉出試驗，在前壁與側壁效應良好的控制下，經切割的廢輪胎能與砂土緊密夯實並增加受正向應力面積，故其拉出阻抗優於完整輪胎。當輪胎減少一側之胎唇鋼絲，切割輪胎發生之拉出應變約為13%，則大於完整輪胎之拉出應變(10%)。在以不同的連接材料評估兩個輪胎的加勁成效，其結果顯示輪胎與輪胎間的拉伸變形將影響其拉出阻抗，需藉由低延伸性材料與剛性繫材限制輪胎的變形；以剛性繫材連接之輪胎，其拉出應變可降低至10%。因此，採用廢舊輪胎進行加勁填築時，需注意輪胎產生的沉陷變形量。

關鍵字

廢輪胎；拉出試驗；拉出阻抗

並列摘要

The impact on environment caused by waste tire disposal continues to be a serious concern in 21st century. Since tire’s raw materials have characteristics such as high strength and long durability, many researchers have studied how to take the advantages of reusing these characteristics. In the research, a new concept was proposed to utilize waste tire as the reinforcement element for the reinforced soil structure. Since the 3D geometry of tire is different from traditional planar geosynthetics (such as geotextiles and geogrids), the boundary condition and interface interaction will also be different from current theoretical models. To evaluate the performance of waste tire as reinforcing material, Image Analysis model test and pullout resistant behavior is the main focus of this study. Cut tire and whole tire were compared in pullout test. Flexible materials were also used in this study to eliminate the extrusion of filled sands caused by front/side wall effect. After the front/side wall effects has been successful controlled, the test results showed cut-tire provide better confinement of sands and increase the area subjected to normal stress. It had significantly better pullout resistance than the whole tire reinforced soil. When the tire to reduce the side of bead wire, cut-tire have pullout strain about 13% that larger than whole tire(10%). Needs to restrain the tire deformation by lower elongation materials and rigid clips for connection. For the rigid clips of tire, pullout strain had reduced to 10%. Therefore, using of waste tires to fill reinforced, need to be careful about deformation and settlement of tire. Propose that method can be applied for on the gradual slope or embankment reinforced engineering.

並列關鍵字

waste tires ； pullout test ； pullout resistance

參考文獻

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國際替代計量

廢輪胎加勁土結構之拉出行為與力學分析研究

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