امکان‌سنجی تزریق ‌هم‌زمان هیدرولیکی و الکتروفورتیک سیلیس کلوئیدی در ماسه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا، دانشکده فنی و مهندسی، دانشگاه بین المللی امام خمینی (ره)، قزوین، ایران

2 دانشیار، دانشکده فنی و مهندسی، دانشگاه بین المللی امام خمینی (ره)، قزوین، ایران

چکیده

یکی از متدوال‌ترین روش‌های به‌سازی خاک‌های اشباع به کارگیری پدیده الکتروکینتیک است. آبکشی خاک‌های ریزدانه رسی، رفع آلودگی فلزات سنگین از خاک و همچنین تزریق الکتروکینتیک تثبیت کننده‌های مختلف از جمله سیلیکات سدیم، سیلیس کلوئیدی و محلول‌های یونی به ویژه در خاک‌های ریزدانه که تزریق هیدرولیکی با فشار در آنها به بافت خاک صدمه می‌زند به عنوان روش تثبیتی غیرمحرک؛ نمونه‌هایی از کاربرد این روش است. سیلیس کلوئیدی تثبیت کننده‌ای است که از پراکنده شدن ذرات باردار در محیط‌های متفاوت مانند آب به دست می‌آید. بررسی کمی میزان تزریق پذیری سیلیس کلوئیدی و تأثیر این ماده و پدیده الکتروکینتیک بر خصوصیات فیزیکی و شیمیایی خاک و مایع منفذی و تأثیر هم زمان آن با تزریق هیدرولیکی، نیازمند ساخت دستگاهی است تا کنترل پارامترهای متفاوت را امکان پذیر کند. به همین منظور، کار حاضر به شیوه ساخت دستگاه و ساز و کاری که بتوان توسط آن پدیده الکتروکینتیک در به سازی خاک به ویژه تزریق سیلیس کلوئیدی را تحت شرایط متفاوت هیدرولیکی بررسی نمود، پرداخته است. دستگاه ساخته شده و عملکرد آن با انجام آزمایش بر روی نمونه ماسه مورد بررسی قرار گرفت. با انجام آزمایش‌های تک محوری و همچنین اندازه گیری سرعت موج برشی نمونه‌های تزریق شده، قابلیت دستگاه مورد نظر جهت اعمال، بررسی و کنترل پارامترهای لازم در تحقیقات مربوطه تأیید شد.

کلیدواژه‌ها


عنوان مقاله [English]

Feasibility Study of Coupled Hydraulic and Electrophoretic Injecting colloidal silica in silty sand

نویسندگان [English]

  • M. A. Nozari 1
  • Reza Ziaie Moayed 2
1 Department of Geotechnical Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran
2 Department of Geotechnical Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran
چکیده [English]

Electro kinetic approach is a conventional method to improve soil characteristics. Dewatering, heavy metal remediation as well as injection stabilizers such as sodium silicate, colloidal silica and ionic solutions, especially in clayey and silty soil, which are sensitive to high pressure methods, are applicable via electro kinetic way. As a green product stabilizer, colloidal silica a dispersion of nano silica particles in water medium phase has been widely investigated by researchers. To quantify the effect of various factors such as solution electrochemical properties and electro kinetic injection conditions on stabilized soil and pore fluid, a suitable apparatus is necessary for laboratory tests. The apparatus should facilitate control and management of hydraulic and electro kinetic conditions. So, the main objective of the paper is to study the electro kinetic injection synced with hydraulic one into loose sand via appropriate instrument. An appropriate device has been designed and constructed and validated by feasibility tests. The trend of current intensity was compatible with previous works as well as uniaxial shear strength and shear wave velocity increase of soil. In conclusion, built apparatus could be useful for future studies.

کلیدواژه‌ها [English]

  • colloidal silica
  • ground improvement
  • passive stabilization
  • electrokinetic injection
  • Sand
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