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بررسی اثر بهسازی خاک به روش ریزشمع در خاک مارن: مطالعه موردی بیدبلند خوزستان | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 7، دوره 54، شماره 12، اسفند 1401، صفحه 4573-4588 اصل مقاله (2.75 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2022.20705.7506 | ||
| نویسندگان | ||
| رسول عالی پور* 1؛ حسام امین پور2؛ علی دهقان زاده3 | ||
| 1دانشکده فنی مهندسی، دانشگاه شهرکرد، شهرکرد، ایران | ||
| 2دانشکده فنی، دانشگاه بوعلی سینا، همدان، ایران | ||
| 3دانشکده فنی، دانشگاه آزاد آبادان، ایران | ||
| چکیده | ||
| در این تحقیق بر مبنای یک مطالعه موردی با استفاده از ریزشمعهای تزریقی عملیات بهسازی خاک زیر پیهای منفرد یک سازه بتنی نشست کرده ارائه گردیده است. بر این اساس میزان تأثیر استفاده از ریزشمعها در کنترل میدان تنش-تغییر شکل ایجاد شده در خاک بستر سازه بتنی مورد مطالعه قرار گرفته است. برای ارزیابی وضعیت نشستهای رخ داده، نسبت به جمعآوری اطلاعات لازم شامل انجام شناسایی زیر سطحی به وسیله حفر گمانههای ژئوتکنیکی و نیز انجام عملیات پایش نشستها اقدام گردید. برداشتهای نقشهبرداری قبل از انجام عملیات بهسازی خاک دلالت بر نشست پیهای منفرد و ادامهدار بودن نشستها داشت. پس از عملیات بهسازی خاک این روند به صفر رسید. با استفاده از نرمافزار اجزا محدود Abaqus مجموعه تحلیلهای عددی بر روی سازه بتنی احداث شده بر بستر سست که مستعد تغییر شکلهای مخربی در اعضای باربر سازهای مانند ستونها میباشند، انجام پذیرفت. در این شبیهسازیها به منظور به دست آوردن عملکرد بهینه ریزشمعها، پارامترهای عمق، قطر و تعداد ریزشمع مورد بررسی قرار گرفت. ضرورت این تحقیق در مورد تصمیمگیری برای بهسازی خاک یک سازه بتنی نشست کرده در مجاورت گودبرداری انجام شده بر اساس روش ریزشمع و یا تخریب سازه را در بر میگیرد. نتایج به دست آمده نشان داد که پارامترهای طول و تعداد ریزشمع بیشترین تأثیر را بر کنترل میدان تغییر شکل و نشست سازه دارا میباشد. همچنین نتایج بیانگر آن است که تأثیر پارامتر وزن سازه در اندرکنش ریزشمع و سازه قابلتوجه هست. | ||
| کلیدواژهها | ||
| ریزشمع؛ بهسازی خاک؛ پی منفرد؛ مدلسازی عددی؛ نرمافزار اجزا محدود آباکوس | ||
| موضوعات | ||
| بهسازی خاک ها | ||
| عنوان مقاله [English] | ||
| Investigating the effect of soil improvement by micropile method in marl soil: a case study of Bidboland, Khuzestan | ||
| نویسندگان [English] | ||
| Rasoul Alipour1؛ Hesam Aminpour2؛ Ali Dehghanzadeh3 | ||
| 1Department of Civil Engineering, Shahrekord University, Shahrekord, Iran | ||
| 2M.Sc. in Geotechnical Engineering, Bu Ali Sina University, Hamedan | ||
| 3Islamic Azad University of Abadan | ||
| چکیده [English] | ||
| Based on a case study, the soil improvement operation under single foundations of a settled concrete structure has been presented using injected micropiles. Based on this, the effect of using micropiles in controlling the stress-deformation field created in the soil of the concrete structure has been studied. In order to evaluate the situation of the settlements, the necessary information was collected, including subsurface identification using geotechnical boreholes and settlement monitoring operations. The survey results before the soil improvement operations indicated the settlement of individual foundations and the continuity of the settlements. After the soil improvement operation, this trend reached zero. Using the Abaqus finite element software, a set of numerical analyses was performed on a concrete structure built on a loose foundation prone to destructive deformations in structural load-bearing members such as columns. In these simulations, in order to obtain the optimal performance of micropiles, the parameters of depth, diameter, and several micropiles were examined. The necessity of this research includes the decision to improve the soil of a settled concrete structure in the vicinity of the excavation based on the micropiles method or the destruction of the structure. The obtained results showed that the parameters of the length and number of micropiles have the greatest effect on the control of the deformation field and settlement of the structure. Also, the results show that the effect of the structure weight parameter on the interaction between the micropiles and the structure is significant. | ||
| کلیدواژهها [English] | ||
| Micropile, Soil Improvement, Single Foundation, Numerical Modeling, Abaqus | ||
| مراجع | ||
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