مهندسی سازه و ساخت

مهندسی سازه و ساخت

استفاده از روش‌های مطالعه ریزساختار بتن جهت ارزیابی دوام فونداسیون خطوط ‏انتقال نیرو در استان گلستان

نوع مقاله : علمی - پژوهشی

نویسندگان
1 محقق پسادکتری، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
2 استاد، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
چکیده
اهمیت بررسی دوام بتن زمانی آشکار می‌گردد که عدم شناخت رفتار بلندمدت این ماده در پروژه‌های عمرانی می‌تواند منجر به خرابی‌های ‏گسترده سازه‌ای، افزایش هزینه‌های نگهداری و کاهش عمر بهره‌برداری شود. یکی از اجزای مهم زیرساختی که بررسی دوام آن از اهمیت ‏ویژه‌ای برخوردار است، فونداسیون خطوط انتقال نیروی برق می‌باشد که به عنوان شریان حیاتی در تأمین انرژی عمل می‌کنند. در این ‏راستا، پژوهش حاضر با هدف ارزیابی شرایط دوامی فونداسیون‌های خطوط انتقال نیرو در استان گلستان، اقدام به انجام مطالعات میدانی و ‏تحلیل‌های ریزساختاری کرده است. بررسی‌های میدانی شامل بازرسی بصری و تعیین عمق کربناته شدن و آزمایش‌های آزمایشگاهی ‏شامل آنالیزهای پیشرفته مانند طیف‌نگاری فلوئورسانس پرتوی ایکس (‏XRF‏)، پراش پرتوی ایکس (‏XRD‏) و میکروسکوپ الکترونی روبشی ‏همراه با طیف‌سنجی پراکندگی انرژی پرتوی ایکس (‏SEM/EDX‏) بوده است. نتایج حاکی از آن است که بتن آسیب‌دیده دارای سه ناحیه ‏متمایز ریزساختاری است: ناحیه اول شامل فازهای گچ و کلسیت، ناحیه دوم حاوی ژل‌های سیلیسی و آلومینایی و نمک‌های سولفاتی، و ‏ناحیه سوم شامل محصولات هیدراسیون و اترینگایت می‌باشد. همچنین، وقوع همزمان پدیده‌هایی نظیر آبشستگی یون کلسیم، کربناته ‏شدن و حمله سولفاتی به عنوان عوامل اصلی تخریب این سازه‌ها شناسایی شده‌اند. این نتایج ضعف دوامی گسترده بتن مورد استفاده در ‏فونداسیون خطوط انتقال مورد بررسی را نشان می‌دهد.‏
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Utilization of Concrete Microstructural Investigation Techniques to Assess the ‎Durability of Power Transmission Line Foundations in Golestan Province, Iran

نویسندگان English

Sina Asadollahi 1
Mehdi Dehestani 2
1 Post-Doctoral Fellow, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
2 Full Professor, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
چکیده English

The significance of concrete durability assessment becomes evident when the ‎lack of understanding of its long-term behavior in civil engineering projects ‎can lead to extensive structural failures, increased maintenance costs, and a ‎reduction in the overall service life of infrastructure. In this context, the ‎evaluation of durability conditions in transmission line foundations—key ‎components of power distribution networks—is of paramount importance, ‎particularly in harsh environmental conditions. This study focuses on the ‎assessment of the concrete durability in existing transmission line foundations ‎in Golestan Province, Iran. A comprehensive approach was adopted that ‎combined field investigations with detailed microstructural analyses. The ‎methodologies employed included visual inspection, carbonation depth ‎measurement, X-ray fluorescence (XRF) spectroscopy, X-ray diffraction ‎‎(XRD) analysis, and scanning electron microscopy coupled with energy-‎dispersive X-ray spectroscopy (SEM/EDX). The results indicated the presence ‎of three distinct microstructural zones in the deteriorated concrete. Zone 1 ‎was characterized by gypsum and calcite phases; Zone 2 contained silica gel, ‎alumina gel, and sulfate salts; and Zone 3 consisted of hydration products ‎and ettringite. Furthermore, the co-existence of destructive mechanisms—‎including calcium ion leaching, carbonation, and sulfate attack—was ‎identified as the main contributor to the degradation of the concrete. These ‎findings reveal the widespread durability deficiencies of the concrete used in ‎the foundations of the transmission lines under investigation.‎

کلیدواژه‌ها English

Transmission Lines
Foundation
Concrete Microstructure
X-ray fluorescence (XRF) &‌lrm
spectroscopy
X-ray diffraction
(XRD) &‌lrm
analysis
&‌lrm
(SEM/EDX) Technique&‌‌lrm
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  • تاریخ دریافت 21 اردیبهشت 1404
  • تاریخ بازنگری 24 شهریور 1404
  • تاریخ پذیرش 20 آبان 1404