بررسی کارایی آهک زنده و شکفته جهت بهسازی خاک‌های جنگلی حاوی مواد آلی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه زمین شناسی، دانشکده علوم پایه، دانشگاه بوعلی سینا، همدان، ایران

2 استادیار،‌ گروه زمین‌شناسی مهندسی دانشکده علوم پایه دانشگاه تربیت مدرس nikudelm@yahoo.com

3 کارشناس ارشد زمین‌شناسی مهندسی، دانشگاه بوعلی سینا، دانشکده علوم، همدان

چکیده

از نظر زمین‌شناسی مهندسی، خاک­های آلی به­ویژه خاک­های جنگلی در رده های خاک­های مسأله­دار قرار می­گیرند که به دلیل حضور مواد آلی در آن­ها و شرایط جوی پر­بارش، مشکلات عدیده­ای را در اغلب پروژه­ها ایجاد می­کنند. از جمله این مشکلات می‌توان به ظرفیت باربری پایین، نشست زیاد در محل شالوده سازه­ها و غیره اشاره کرد که در صورت حضور این خاک­ها در محل پروژه­ها باید آنها را بهسازی و تقویت نمود. در این مقاله تأثیر افزودن آهک زنده و شکفته و نیز دوره عمل‌آوری بر پارامتر­های ژئوتکنیکی خاک آلی جنگل شهید زارع ساری بررسی شده و کارایی روش­های به­کاررفته، مطالعه شده است. نتایج آزمایش­ها حاکی از این است که آهک شکفته بر خاصیت متراکم شدن خاک آلی موثرتر از آهک زنده است. همچنین تأثیر آهک زنده در افزایش مقاومت فشاری نمونه­های اصلاح شده مشهود­تر می­باشد. در این بررسی مقادیر بهینه آهک زنده 5 درصد و آهک شکفته 7 درصد تعیین گردید.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The study of efficiency of quicklime and hydrated lime for stabilization of forest soils contains organic materials

نویسندگان [English]

  • Seyed Davoud Mohammadi 1
  • Mohammadreza Nikudel 2
  • Azam Golestani 3
1 Dep. of Geology, Faculty of Sciences, Bu-Ali Sina University, Hamedan, Iran
2 Assistant professor, Department of Engineering Geology, Tarbiat Modares University, nikudelm@modares.ac.ir
3 M.Sc. of Engineering Geology, Bu Ali Sina University, Hamedan, Iran.
چکیده [English]

In engineering geology the organic soils are classified as problematic soils. Because of the organic matter presence in them, are created many problems in most projects. Some of these problems are low bearing capacity, excessive settlement in foundations, swelling, etc. If the organic soils are available on project sites, it should be stabilized. This research describes a study on the effect of quicklime and hydrated lime on geotechnical properties of organic soils in Shahid Zare forest and efficiency of used method. The results show that the hydrated lime more effective than quicklime on the compaction properties of organic soils. The effect of quicklime in increasing of compressive strength is more than of hydrated lime. In this study optimum amount of quicklime and hydrated lime determined 5% and 7% respectively. 

کلیدواژه‌ها [English]

  • Geotechnical parameters
  • Problematic soil
  • Compressive strength
  • CBR
  • Undrained shear strength
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