بهسازی سطحی خاک‌های سیلتی با تغییر دانه‌بندی مصالح و ارائه طرح اختلاط بهینه

نوع مقاله : یادداشت پژوهشی

نویسندگان

1 دانشکده فنی و مهندسی، دانشگاه آیت‌الله العظمی بروجردی

2 گروه مهندسی عمران، مرکز اموزش عالی محلات

3 دانشگاه آزاد اسلامی، واحد خمین

10.22034/ceej.2018.7586

چکیده

     امروزه در زمینه بهسازی خاک تحقیقات گسترده­ای صورت گرفته است. در اکثر این تحقیقات از یک افزودنی مانند سیمان یا آهک به منظور بهبود خواص مقاومتی خاک بهره گرفته شده است. در این تحقیق با توجه به مشخصات ضعیف مصالح موجود در سایت، سعی شده است با تغییر دانه­بندی مصالح، مقاومت مورد نیاز خاک تأمین گردد. بدین منظور با استفاده از روش تاگوچی طرح اختلاط­های مختلفی تعیین گردید که در مجموع 25 حالت مختلف مشخص شد. برای تعیین پارامترهای مقاومتی خاک در این حالت­ها 75 آزمایش برش مستقیم بزرگ 30×30 سانتی­متر انجام گرفته است. در ادامه با استفاده از روش تاگوچی طرح اختلاط بهینه به دست آمده و ظرفیت باربری در دو شرایط اولیه خاک و طرح اختلاط بهینه تعیین گردیده و تأثیر درصد ترکیبات مصالح مختلف مورد ارزیابی قرار گرفته است. در نهایت طرح اختلاط به دست آمده جهت اجرا در پروژه، ارائه گردیده و در منطقه صنعتی اراک در زمینی به مساحت 100000 مترمربع به اجرا رسیده است.
 

کلیدواژه‌ها


عنوان مقاله [English]

Shallow Soil Improvement by Changing Aggregation Size and Propose the Optimize Mix Design

نویسندگان [English]

  • Ahmadreza Mazaheri 1
  • Masoud Paknahad 2
  • Mohammad Torkaman 3
1 Department of Civil Engineering, Engineering Faculty, Ayatollah Borujerdi University
2 Department of Civil Engineering, Mahallat Institute and Higher Education
3 Islamic Azad University, Khomein Branch
چکیده [English]

     In this study, the fine weak materials replaced with different percentages of coarse aggregate to provide the best resistance and load capacity for heavy construction in the area. For this purpose, by using the Taguchi method and taking four classes of materials, different mixing of the materials were determined, and large scale samples with dimensions 30×30cm with the new material compounds was obtained and they were tested. By cooperating neural networks and artificial intelligence the most suitable mix designs and best resistance value determined.

کلیدواژه‌ها [English]

  • Soil improvement
  • Taguchi Method
  • direct shear tests
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