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Evaluation the Efficiency of Installing Stone Columns in Ground Improvement of Al-Nassiriya City Soil
تقييم كفاءة استخدام الاعمدة الحجرية في تحسين تربة مدينة الناصرية

Authors: Esraa Abdulaemma Mandhour --- Nesreen Kurdy Thabbah Al-Obaidy
Journal: Thi-Qar University Journal for Engineering Sciences مجلة جامعة ذي قار للعلوم الهندسية ISSN: 20759746 Year: 2011 Volume: 2 Issue: 3 Pages: 44-56
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

This paper investigates the performance of stone columns in soft soil of Al-Nassiriya city (one of Iraqi cities in the south). A geotechnical study of physical and mechanical properties of the soil has been carried out for a selected areas from Al-Nassiriya city. A finitedifference Matlab program has been employed in simulation of installing stone columns in the aforementioned soil. Results of the study illustrate using stone columns reduces the settlement of the soil for different values of the modular ratio and replacement ratio, thusthe Wmax maximum settlement ratio changes from 30% to 16% of the modular ratios (E/E)=10 and 50 respectively. The effect of spacing and column width is taken intoconsideration.All results are reasonable and harmonic with most last studies.c-


Article
Laboratory Study of an Injected Soil with Chemical Clayey Grout
التمثيل المختبري للخلية المركبة من مادة الحقن الكيميائية والتربة المحيطة بها من اجل دراسة العوامل التي تتحكم في تحسين التربة المحقونة

Author: Nesreen Kurdy Thabbah Al-Obaidy نسرين كردي ذباح
Journal: Univesity of Thi-Qar Journal مجلة جامعة ذي قار العلمية ISSN: 66291818 Year: 2012 Volume: 7 Issue: 2 Pages: 1-17
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

It is generally accepted that only chemical grouts or solutions are available to penetrate and fill narrow joints or soils with very small pore size. Over the last 30 years a few hundred different compounds have been used for this purpose. Such materials show a wide spectrum of properties.Clayey grouts are among the compounds that are commonly used in chemical grouting because of their high strength and durability against mechanical or physical erosion. In this research work, a new filler of clayey grout is introduced consist of clay additive by two dispersing agent (sodium phosphate) and a passive material necessary for colouring the grout so it can be distinguish from the surrounding soil). In many samples, the filler has been injected with soil which required to improve, and many factors take into consideration.Results of lab tests which are employed here indicated that grout efficiency is raised with increasing number of holes, penetration depth, and it is affected clearly by variety in pattern of injection holes.

التمثيل المختبري للخلية المركبة من مادة الحقن الكيميائية والتربة المحيطة بها من اجل دراسة العوامل التي تتحكم في تحسين التربة المحقونة

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