ارزیابی عملکرد دیوار حائل خاک مسلح با تسلیح‌کننده‌های مورب، رویه شیب‌دار و مهار تسلیح‌کننده‌ها

نویسنده
محمد جواد شعبانی رمنتی
دانشجو
چکیده
طی سه دهه گذشته با توجه به مزایای دیوارهای حائل خاک مسلح، استفاده از این دیوارها در طرح‌های عمرانی افزایش قابل توجهی یافته است. از بزرگترین مزایای دیوارهای خاک مسلح انعطاف‌پذیری این دیوارها و توانایی آن‌ها برای جذب تغییرشکل‌ها به علت شرایط ضعیف خاک شالوده‌ها می‌باشد. در این تحقیق با بررسی مطالعات گذشته سعی شده تا تاثیر شیبداری رویه دیوار، تسلیح‌کننده‌های مورب و مهار تسلیح‌کننده‌ها بر عملکرد دیوار به صورت تجربی مورد بررسی قرار گیرد. در این راستا در مجموع 14 مدل دیوار در مقیاس آزمایشگاهی ساخته شده و عملکرد آن‌ها تحت بارگذاری مناسب مورد ارزیابی قرار گرفت. نتایج حاصل از بررسی‌های تجربی نشان داد که با کاهش شیب رویه دیوار، تغییرشکل رویه کاهش می‌یابد. همچنین با افزایش شیب لایه‌های تسلیح، تغییرشکل افقی رویه دیوار کاهش یافته بود. از این رو با توجه به نتایج به دست آمده، دیوار با شیب لایه‌های تسلیح 10 درجه و شیب رویه 80 درجه باعث بهبود قابل توجهی در عملکرد دیوار می‌گردد به نحوی که حداکثر تغییرشکل افقی رویه تا 20% کاهش می‌یابد.

کلیدواژه‌ها

عنوان مقاله English

Evaluation of Performance Reinforced Soil Retaining Wall with Oblique Reinforcements, Slope Facing and Reinforcements Anchor

نویسنده English

mohammad shabani rameneti
چکیده English

Due to the advantages of reinforced soil retaining walls, the using of type of the walls has increased in civil projects over the past three decades. One of the reinforced soil applications is the construction reinforced soil retaining walls. The major advantages of the reinforced soil walls are their flexibility and absorbency of deformations. Regarding experiences derived from previous studies, it attempted to investigate the effect of facing slope, oblique reinforcements and reinforcements anchoring on the performance retaining wall by experimental. In this study, 14 models of the walls were constructed. Results of the study provide evidence that horizontal deformation of the wall facing decreased with decreasing of the facing slope. Moreover, with increasing of the reinforcements slope the horizontal deformation reduced. Results showed that reinforced soil wall with oblique reinforcements of 10 degree and facing slope of 80 degree reduce the maximum horizontal deformation of the facing by 20%.Due to the advantages of reinforced soil retaining walls, the using of type of the walls has increased in civil projects over the past three decades. One of the reinforced soil applications is the construction reinforced soil retaining walls. Regarding experiences derived from previous studies, it attempted to investigate the effect of facing slope, oblique reinforcements and reinforcements anchoring on the performance retaining wall by experimental. In this study, 14 models of the walls were constructed. Results of the study provide evidence that horizontal deformation of the wall facing decreased with decreasing of the facing slope. Moreover, with increasing of the reinforcements slope the horizontal deformation reduced. Results showed that reinforced soil wall with oblique reinforcements of 10 degree and facing slope of 80 degree reduce the maximum horizontal deformation of the facing by 20%.Due to the advantages of reinforced soil retaining walls, the using of type of the walls has increased in civil projects over the past three decades. One of the reinforced soil applications is the construction reinforced soil retaining walls. The major advantages of the reinforced soil walls are their flexibility and absorbency of deformations. Regarding experiences derived from previous studies, it attempted to investigate the effect of facing slope, oblique reinforcements and reinforcements anchoring on the performance retaining wall by experimental. In this study, 14 models of the walls were constructed. Results of the study provide evidence that horizontal deformation of the wall facing decreased with decreasing of the facing slope.Due to the advantages of reinforced soil retaining walls, the using of type of the walls has increased in civil projects over the past three decades. One of the reinforced soil applications is the construction reinforced soil retaining walls. Results of the study provide evidence that horizontal deformation of the wall facing decreased with decreasing of the facing slope. Moreover, with increasing of the reinforcements slope the horizontal deformation reduced. Results showed that reinforced soil wall with oblique reinforcements of 10 degree and facing slope of 80 degree reduce the maximum horizontal deformation of the facing by 20%

کلیدواژه‌ها English

Reinforced soil
Oblique reinforcements
Slope facing
Reinforcements anchor
[1]Ahmed, M. 1953. Experiments on design and behavior of spur-dikes, In proc. Minnesota International Hydraulics Convention, Minneapolis.145-59.
[2]Chen, F. Y., and Ikeda, S. 1997. Horizontal separation in shallow open channels with spur dikes. Journal of Hydroscience and Hydraulic Engineering, 15(2): 15-30.
[3]Ahmed, F., and Rajaratnam, N. 2000. Observations on flow around bridge abutments. J. Eng. Mech., ASCE, 126(1): 51-59.
[4] Ujitewaal W. 2005. Effect of groyne layout on the flow in groyne fields: laboratory experiments. J. Hydraul. Eng., 131(9): 782-91.
[5]Nagata, N., Hosada T., and Nakato, T. 2005. Three-dimensional numerical model for flow and bed deformation around river hydraulic structures. J. Hydraul. Eng., 131(12): 1074-1087.
[6] Kadota, A., Suzuki, K. and Uijtewaal, W. S. J. 2006. The shallow flow around a single groyne under submerged and emerged conditions. RiverFlow 2006, Portugal, 673-682.
[7]Koken, M. and Constantinescu, G. 2008. An investigation of the flow and scour mechanisms around isolated spur dikes in a shallow open channel:1. Conditions corresponding to the initiation of the erosion and deposition process. Water resources research. 44, W08406, doi:10.1029/2007WR006489.
[8]Koken, M. and Constantinescu, G. 2008. An investigation of the flow and scour mechanisms around isolated spur dikes in a shallow open channel: 2. Conditions corresponding to the final stages of the erosion and deposition process. Water resources research. 44, W08407, doi:10.1029/2007WR006491.
[9] Kuhnle, R. A., Alonso, C. V., and Jia, Y. J., . 2008 “Measured and simulated flow near spur dikes, ”. Journal of Hydraulic Engineering, ASCE, Vol.128, No. 12, 1087-1093
[10]Kuhnle, R. A., Alonso, C. V., and Jia, Y. J., 2008 “Flow around a submerged trapezoidal spur dike test case , ”. Journal of Hydraulic Engineering, ASCE, Vol.128, No. 12, 1087-1093..
[11] Kuhnle, R. A., Alonso, C. V., and Shields, F. D., Jr., 2002. “Local scour associated with angled spur dikes, ”. Journal of Hydraulic Engineering, ASCE, Vol.128, No. 12, 1087-1093..
[12] Duan, J., 2009. Mean flow and turbulence around a laboratory spur dike. J. Hydraul. Eng., 135(10): 803-811.
[13]Duan, J., He, L., Fu, X., and Wang, Q. 2009. Mean flow and turbulence around an experimental spur dike. Adv. Water Resour., 132(12): 1717-1725.
[14] صفرزاده گندشمین، ا. 1389. "مطالعه آزمایشگاهی الگوی جریان آشفته حول آبشکن با شکل‌های مختلف دماغه". رساله دکتری. دانشکده فنی و مهندسی. دانشگاه تربیت مدرس.
[15] Teruzzi, A., Ballio, F., and Armenio, V. 2009. Turbulent stresses at the bottom surface near an abutment: laboratory-scale numerical experiment. J. Hydraul. Eng., 135(2): 106-117.
[16]Nelson, J. M., Shreve, R. L., McLean, S. R., and Drake, T. G. 1995. Role of near-bed turbulence structure on bed load transport and bed form mechanics. Water Resour. Res., 31(8): 2071–2086.
 
مهندسی عمران مدرس
دوره 16، شماره 1
فروردین و اردیبهشت 1395
صفحه 55-68