تحلیل عددی و کاربردی رفتار برکنش مهار صفحه‌ای در خاک مسلح: بهینه‌سازی ظرفیت باربری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده فنی و مهندسی، واحد مشهد، دانشگاه آزاد اسلامی، مشهد، ایران.

2 گروه مهندسی عمران، موسسه آموزش عالی اشراق، بجنورد، ایران.

3 گروه مهندسی عمران، دانشکده مهندسی، دانشگاه بوعلی سینا، همدان، ایران.

چکیده

در این پژوهش، اثر به کارگیری ژئوسل و ژئوگرید بر ظرفیت باربری خاک تحت نیروی برکنش مهار صفحه‌ای با مدل‌سازی سه‌بعدی در ABAQUS بررسی و سناریوهای مختلف شامل تعداد و فاصله لایه‌های ژئوسل، موقعیت ژئوگرید، ارتفاع پاکت ژئوسل، تعداد نواحی بارگذاری و خروج از مرکز ژئوسل ارزیابی شد. بدین منظور ابتدا دو مدل عددی ساخته شده در حالت‌های غیرمسلح و مسلح به ژئوسل که در نرم افزار ABAQUS ساخته شده بودند با نتایج به‌دست آمده از مدلسازی فیزیکی مقایسه و صحت سنجی گردیدند و در ادامه مطالعه پارامتریکی بر روی پارامترهای مهم طراحی صورت گرفت. نتایج نشان داد افزودن دو لایه ژئوسل ظرفیت را تا 30% افزایش می‌دهد، در حالی‌که افزایش فاصله بین آن‌ها موجب کاهش ظرفیت می‌شود. ترکیب ژئوگرید در موقعیت بهینه زیر ژئوسل ظرفیت را تا 39% بهبود داد. تغییر ارتفاع پاکت ژئوسل نیز حدود 13%± بر ظرفیت مؤثر بود. افزایش تعداد نواحی اعمال بار از یک به دو، بهبود چشم‌گیر حدود 200% ایجاد و افزایش خروج از مرکز ژئوسل ظرفیت را تا حدود 28% بیشتر کرد. در مجموع، انتخاب مناسب آرایش و ابعاد ژئوسل و ژئوگرید می‌تواند عملکرد مهار صفحه‌ای را به‌طور قابل‌توجهی ارتقا دهد و به‌عنوان رویکردی مؤثر در طراحی‌های ژئوتکنیکی به‌کار رود. نتایج پژوهش حاضر می‌تواند زوایای پنهان موجود در طراحی سیستم‌های خاک مسلح را روشن نماید.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Numerical and Practical Analysis of the Uplift Behavior of Plate Anchors in Reinforced Soils: Optimization of Bearing Capacity

نویسندگان [English]

  • Seyed-Shahaboddin Shariati 1
  • Danial Moazzami 1
  • Abdollah Tabaroei 2
  • Arash Mahmoudi 3
1 Islamic Azad University, Mashhad, Iran
2 Assistant Professor, Department of Civil Engineering, Eshragh Institute of Higher Education, Bojnourd, Iran
3 Bu-Ali Sina University, Hamedan, Iran
چکیده [English]

This study investigates the influence of geocells and geogrids on the bearing capacity of soil subjected to plate anchor uplift loads using three-dimensional modeling in ABAQUS. A series of scenarios were analyzed, including variations in the number and spacing of geocell layers, the placement of the geogrid, the cell height of the geocell, the number of loading zones, and the eccentricity of the geocell. For this purpose, first, two numerical models built in the unreinforced and geocell-armored states, which were built in ABAQUS software, were compared and validated with the results obtained from physical modeling, and then a parametric study was conducted on important design parameters. The findings reveal that the inclusion of two geocell layers can enhance the bearing capacity by up to 30%, whereas wider spacing between the layers reduces this improvement. Incorporating a geogrid at its optimal position beneath the geocell increased the capacity by as much as 39%. Adjusting the cell height of the geocell led to a capacity variation of approximately ±13%. Moreover, doubling the number of loading zones from one to two resulted in a remarkable improvement of nearly 200%, while increasing the geocell eccentricity further enhanced the capacity by about 28%. Overall, the results highlight that the strategic selection of geocell–geogrid configurations and dimensions can markedly improve plate anchor performance, offering an effective technique for advanced geotechnical design. The results of this study can shed light on hidden aspects in the design of reinforced soil systems.

کلیدواژه‌ها [English]

  • Reinforced Soil
  • Geocell
  • Geogrid
  • Uplift Force
  • Bearing Capacity

مراجع

[1] M.E. Mahmudi Mehrizi, Y. Daghigh, J. Nazari Afshar, A review of types of anchors and their roles in geotechnical engineering, in:  International Conference on Civil Engineering, Architecture and Urban Infrastructure, Tabriz, Iran, 2015. (In Persian)
[2] A.K. Choudhary, S.K. Dash, Uplift behaviour of horizontal plate anchors embedded in geocell-reinforced sand, in:  Proceedings of Indian Geotechnical Conference, Roorke, India, 2013.
[3] S.S. Shariati, Numerical study of the uplift behaviour of plate anchor in reinforced soil, Master of science thesis, Islamic Azad University, Mashhad, Iran, 2022. (In Persian)
[4] M. Rahimi, S.N. Moghaddas Tafreshi, B. Leshchinsky, A.R. Dawson, Experimental and numerical investigation of the uplift capacity of plate anchors in geocell-reinforced sand, Geotextiles and Geomembranes, 46(6) (2018) 801–816.
[5] S.N. Moghaddas Tafreshi, S. Javadi, A.R. Dawson, Influence of geocell reinforcement on uplift response of belled piles, Acta Geotechnica, 9(3) (2014) 513–528.
[6] V. Kishor Kumar, K. Ilamparuthi, Performance of anchor in sand with different forms of geosynthetic reinforcement, Geosynthetics International, 27(5) (2020) 503–522.
[7] S.K. Dash, A.K. Choudhary, Geocell reinforcement for performance improvement of vertical plate anchors in sand, Geotextiles and Geomembranes, 46(2) (2018) 214–225.
[8] K. Yünkül, Ö.F. Usluoğulları, A. Gürbüz, Numerical Analysis of Geocell Reinforced Square Shallow Horizontal Plate Anchor, Geotechnical and Geological Engineering, 39(4) (2021) 3081–3099.
[9] Y. Zhao, Z. Lu, H. Venkateswarlu, A. Tabaroei, B. Ateş, C. Tang, Y. Feng, H. Yao, Three-dimensional numerical analysis of uplift capacity for horizontal plate anchors in geocell-reinforced sandy soil, Computers and Geotechnics, 191 (2026).
[10] S.N. Moghaddas Tafreshi, M. Rahimi, A.R. Dawson, B. Leshchinsky, Cyclic and post-cycling anchor response in geocell-reinforced sand, Canadian Geotechnical Journal, 56(11) (2019) 1700–1718.
[11] K. Yünkül, A. Gürbüz, Uplift behavior of shallow horizontal plate anchors reinforced with geocells in cohesionless soil, European Journal of Environmental and Civil Engineering, 26(4) (2022) 1243–1266.
[12] A.K. Choudhary, S.K. Dash, Failure mechanism of geocell-reinforced vertical plate anchors subjected to lateral loading, International Journal of Physical Modelling in Geotechnics, 23(2) (2023) 58–76.
[13] M. Aliasgharzadeh, M. Yosefzadeh, M. Atrchian, M. Bayat, Laboratory Investigation of the Pull-out Capacity of Circular Plate Anchor Buried at a Shallow Depth in Granular Soils Improved with Geocell and Geotextile, Quarterly Journal of Transportation Engineering, 15(3) (2024) 3785–3798. (In Persian)
[14] T. Nagatani, Y. Sawada, Y. Inoue, S. Ito, H.I. Ling, T. Kawabata, New geocell utilisation as a pipe uplifting countermeasure and its validation using model experiments, Geotextiles and Geomembranes, 52(3) (2024) 319–331.
[15] M.S. Keskin, Model studies of uplift capacity behavior of square plate anchors in geogrid-reinforced sand, Geomechanics and Engineering, 8(4) (2015) 595–613.
[16] S. Mukherjee, L. Kumar, A.K. Choudhary, G.L.S. Babu, Pullout resistance of inclined anchors embedded in geogrid reinforced sand, Geotextiles and Geomembranes, 49(5) (2021) 1368–1379.
[17] R. Bhowmik, J.T. Shahu, M. Datta, Experimental studies on inclined pullout behaviour of geosynthetic sheet Vis-À-Vis geogrid - Effect of type of anchor and sand, Geotextiles and Geomembranes, 47(6) (2019) 767–779.
[18] S. Bildik, E.A. Dickin, M.S. Keskin, K. Ilamparuthi, M. Laman, Centrifuge Model Tests and Numerical Analysis of Uplift Capacity of Strip Anchors in Geogrid-Reinforced Sand, Applied Sciences, 13(7) (2023).
[19] Y.-X. Gao, H.-H. Zhu, Y.-F. Ni, C. Wei, B. Shi, Experimental study on uplift behavior of shallow anchor plates in geogrid-reinforced soil, Geotextiles and Geomembranes, 50(5) (2022) 994–1003.
[20] S. Mukherjee, G.L.S. Babu, Three-dimensional numerical analysis of large-scale horizontal square anchors in geogrid-reinforced sand, Geotextiles and Geomembranes, 52(4) (2024) 790–799.
[21] S.N. Moghaddas Tafreshi, A.R. Dawson, A comparison of static and cyclic loading responses of foundations on geocell-reinforced sand, Geotextiles and Geomembranes, 32 (2012) 55–68.
[22] C. Yoo, S. Kim, Performance of a two-tier geosynthetic reinforced segmental retaining wall under a surcharge load: Full-scale load test and 3D finite element analysis, Geotextiles and Geomembranes, 26(6) (2008) 460–472. 
نشریه مهندسی عمران امیرکبیر
دوره 57، شماره 9
آذر 1404
صفحه 1697-1722

فایل ها

هم رسانی

ارجاع به این مقاله

آمار