مطالعه‌ی آزمایشگاهی مقاومت برشی خاک مسلح با الیاف مصنوعی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار گروه مهندسی عمران دانشگاه شهرکرد

2 دانش آموخته کارشناسی مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه شهرکرد.

چکیده

در این مطالعه، رفتار خاک تثبیت شده با الیاف مصنوعی با استفاده از آزمون­های آزمایشگاهی بررسی شد. آزمایش­های برش مستقیم روی نمونه­های خاک تثبیت شده با الیاف شیشه و پلی­پروپیلن با طول 12 میلی­متر انجام شد. نمونه­های مورد آزمایش با توزیع تصادفی 05/0، 1/0، 2/0 و 5/0 درصد الیاف مصنوعی تثبیت شدند. آزمایش­ها تحت تنش­های نرمال مختلف انجام گرفت. نتایج حاکی از آن است که افزودن الیاف باعث بهبود حداکثر مقاومت برشی خاک و افزایش شکل­پذیری نمونه­ها می­شود. نمونه­های مسلح با 1/0 درصد الیاف دارای بیشترین مقاومت برشی ­بودند. همچنین، نتایج بیانگر آن است که در شرایط یکسان، نمونه­های مسلح با الیاف پلی­پروپیلن دارای مقاومت برشی بیشتری نسبت به نمونه­های مسلح با الیاف شیشه می­باشند.

کلیدواژه‌ها


عنوان مقاله [English]

Laboratory study of shearing resistance of soil reinforced with synthetic fibers

نویسندگان [English]

  • Hamed Javdanian 1
  • Pooya Bahrami Samani 2
1 Assistant Professor, Department of Civil Engineering, Shahrekord University
2 B.Sc graduated, Department of Civil Engineering, Shahrekord University, Shahrekord, Iran.
چکیده [English]

Soil stabilization is an effective mechanical method for soil rehabilitation against applied loads. In recent years, synthetic fibers have been introduced as a novel technique for soil stabilization. Therefore, it is essential to assess the behavior of fiber-reinforced soils. In this study, the behavior of synthetic fiber-stabilized soil was investigated using laboratory tests. Direct shear experiments were performed on the specimens reinforced with glass and polypropylene fibers, 12 mm in length. The tested specimens were reinforced with random distribution of 0.05, 0.1, 0.2 and 0.5% of synthetic fibers. The direct shear experiments were performed under different vertical stresses. The tests results indicate that the addition of synthetic fibers improves the maximum shear strength of the tested soil samples. Reinforced samples with 0.1% fibers have the highest shear strength of tested soil. Also, the results indicate that under identical conditions, specimens reinforced with polypropylene fibers have higher shear strength than glass fiber-reinforced specimens.

کلیدواژه‌ها [English]

  • Soil
  • Stabilization
  • Synthetic fiber
  • Shearing resistance
  • Direct shear test
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