عمران و پروژه
اعتبار،چابکی،پاسخگویی

مدلسازی سه‌بعدی تأثیر ژئوسل بر بهسازی پی‌های گسترده در خاک‌های ضعیف اهواز

https://doi.org/10.22034/cpj.2026.588096.1455
دوره 8، شماره 7 - شماره پیاپی 89
مهر 1405
صفحه 59-82
عمران و پروژه

نوع مقاله : مقاله پژوهشی

نویسندگان

امین خورشیدپناه 1
علی سلیقه زاده 2

1 کارشناس ارشد عمران ژئوتکنیک، جهاد دانشگاهی خوزستان، اهواز، ایران.

2 گروه مهندسی عمران، واحد شوشتر، دانشگاه آزاد اسلامی، شوشتر، ایران

چکیده
در این پژوهش، اثر استفاده از ژئوسل به‌عنوان روشی نوین و مؤثر در بهسازی خاک‌های سست و افزایش ظرفیت باربری پی‌های سطحی بررسی شده است. با توجه به شرایط ژئوتکنیکی ضعیف در شهر اهواز و نیاز به جایگزینی روش‌های پرهزینه‌ای مانند شمع‌کوبی، هدف تحقیق ارزیابی عملکرد ژئوسل و تعیین ابعاد بهینه آن بود.مدلسازی عددی سه‌بعدی با نرم‌افزار PLAXIS 3Dبر روی پی بتنی به عرض ۱۰ متر و ضخامت ۰٫۸ متر انجام شد. در این مدل، از مدل رفتاری موهر–کولمب برای خاک و المان ژئوگرید همراه با Interface برای ژئوسل استفاده گردید. تحلیل‌ها در سه مرحله پارامتریک شامل تغییر عمق نصب ژئوسل (u/B)، ارتفاع لایه (h)، و عرض آن (b/B) انجام شد.نتایج نشان داد که استفاده از ژئوسل باعث افزایش قابل‌توجه ظرفیت باربری و کاهش محسوس نشست می‌شود. بهترین عملکرد زمانی حاصل شد که ژئوسل در عمق ۰٫۰۵B از کف پی قرار گرفت. افزایش ارتفاع تا ۲۰ سانتی‌متر و عرض تا ۱٫۵B نیز موجب بهبود رفتار بار–نشست شد.مقایسه مدل بهینه با مدل غیرمسلح نشان داد که ظرفیت باربری بیش از دو برابر افزایش یافته و نشست در بارهای بهره‌برداری به‌طور چشمگیری کاهش یافته است. در نهایت، این تحقیق اهمیت طراحی دقیق و استفاده از ژئوسل را به‌عنوان راهکاری مؤثر، پایدار و اقتصادی در پروژه‌های عمرانی مناطق دارای خاک‌های ضعیف مانند اهواز تأیید می کند.

کلیدواژه‌ها

ژئوسل
ظرفیت باربری
نشست مجاز
PLAXIS 3D
موضوعات

عنوان مقاله English

Three-dimensional modeling of geocell effects on the enhancement of raft foundations in the weak soils of Ahvaz.

نویسندگان English

Amin Khorshidpanah 1
Ali Salighehzadeh 2
1 M.Sc. in Civil Engineering – Geotechnical Engineerin, Jahad University Khuzestan, Ahvaz, Iran.
2 , Department of Civil Engineering, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran.
چکیده English

In this study, the effect of using geocell as an innovative and effective method for improving loose soils and enhancing the bearing capacity of shallow foundations was investigated. Given the weak geotechnical conditions in Ahvaz and the need to replace costly methods such as pile driving, the objective of the research was to evaluate the performance of geocell and determine its optimal dimensions.Three-dimensional numerical modeling was conducted using PLAXIS 3D software on a concrete foundation with a width of 10 meters and a thickness of 0.8 meters. In this model, the Mohr–Coulomb behavioral model was used for the soil, and geogrid elements with interface properties were applied to simulate the geocell.The analyses were performed in three parametric stages, including variations in installation depth (u/B), layer height (h), and layer width (b/B). The results showed that the use of geocell significantly increased the bearing capacity and noticeably reduced settlement. The best performance was achieved when the geocell was placed at a depth of 0.05B below the foundation base. Increasing the height up to 20 cm and the width up to 1.5B also improved the load–settlement behavior, but further increases were not economically justified.Comparison between the optimized model and the unreinforced model revealed that the bearing capacity more than doubled, and settlement under operational loads was significantly reduced. Ultimately, this research confirms the importance of precise design and the use of geocell as an effective, sustainable, and economical solution in civil engineering projects in regions with weak soils, such as Ahvaz.

کلیدواژه‌ها English

  • Geocell
  • Bearing capacity
  • Allowable settlement
  • PLAXIS 3D
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  • تاریخ دریافت 01 خرداد 1405
  • تاریخ بازنگری 02 تیر 1405
  • تاریخ پذیرش 08 تیر 1405
  • تاریخ اولین انتشار 08 تیر 1405
  • تاریخ انتشار 01 مهر 1405

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