بررسی تاثیر کیک لجن و پساب تصفیه خانه ها بر پارامترهای خاک های رسی : روش عددی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشگاه تفرش، تفرش، ایران،

2 گروه مهندسی عمران، دانشگاه تفرش، تفرش، ایران

چکیده

با گسترش شهر نشینی و افزایش جمعیت، به تبع مصرف آب نیز افزایش می یابد که این افزایش مصرف آب، منجر به افزایش تولید فاضلاب و نهایتا تصفیه فاضلاب باعث هدایت مسیر به سوی تولید یک سری مواد زائد تحت عنوان کیک لجن می شود. هدف از این مطالعه بررسی تاثیر کیک لجن و پساب تصفیه خانه ها بر پارامتر های خاک های رسی می باشد. به منظور ارزیابی دقیق اثر استفاده از کیک لجن بر ظرفیت باربری پی و همچنین تاثیر دوره عمل آوری بر ترکیب کیک لجن و خاک رس بستر پی، شانزده حالت مختلف بررسی شد. لازم به ذکر است که مدل های اول الی هشتم در دوره عمل آوری 7 روزه و مدل های نهم الی شانزدهم در دوره عمل آوری 28 روزه مورد بررسی قرار گرفت. با توجه به نتایج ارائه شده می توان دریافت که در هر دو دوره عمل آوری با افزایش میزان کیک لجن موجود در خاک، ظرفیت باربری پی نیزافزایش پیدا کرده است به عبارت دیگر پارامتر درصد کیک لجن موجود در بستر رسی پی در مقایسه با دوره عمل آوری از تاثیرگذاری بسیار بیشتری بر ظرفیت باربری پی برخوردار است. در مقابل افزایش مدت زمان عمل آوری تاثیر چشمگیری بر پارامترهای مورد بررسی نداشته است. همچنین ارزیابی نتایج نشان می دهد که ترکیب 14 درصد لجن با خاک رس بستر پی منجر به بیشترین افزایش ظرفیت باربری پی در بین سایر درصد ترکیبات شده است که می توان آن را به عنوان درصد بهینه معرفی نمود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation the Effect of Sludge Cake and Sewage Sludge on Clay Soil Parameters: A Numerical Approach

نویسندگان [English]

  • Nemat Allah Samiei Paghaleh 1
  • Mohammad Reza Boroomand 2
  • Mahmoudreza Shahverdi 2
1 Department of Civil Engineering, Tafresh University, Tafresh, Iran
2 Department of Civil Engineering, Tafresh University, Tafresh, Iran
چکیده [English]

With the expansion of urbanization and the increase in population, water consumption also increases, which leads to an increase in sewage production and the production of waste materials in the form of sludge cake. The purpose of this study is to investigate the effect of sludge cake and wastewater treatment plants on the parameters of clay soils. To accurately evaluate the effect of using sludge cake on the bearing capacity of the foundation, as well as the effect of the curing period on the composition of the sludge cake and clay of the foundation bed, sixteen different conditions were investigated. According to the presented results, it can be seen that in both processing periods, with the increase in the amount of sludge cake in the soil, the bearing capacity of the foundation has also increased, in other words, the parameter of the percentage of sludge cake in the clay bed of the foundation compared to the processing period. It has a much greater impact on the bearing capacity of the foundation. On the other hand, increasing the processing time did not have a significant effect on the examined parameters. Also, the evaluation of the results shows that the combination of 14% of sludge with the clay of the foundation bed has led to the greatest increase in the bearing capacity of the foundation among other percentages of combinations, which can be introduced as the optimal percentage.

کلیدواژه‌ها [English]

  • Sludge Cake
  • Wastewater Effluent
  • Soil Improvement
  • Bearing Capacity
  • Numerical Modeling
  • PLAXIS 3D

مراجع

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نشریه مهندسی عمران امیرکبیر
دوره 57، شماره 9
آذر 1404
صفحه 1597-1618

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