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Journals / Türk Deprem Araştırma Dergisi / 2022 / Cilt: 4 - Sayı: 2

A Numerical Study on the Efficiency of Jet Grout Columns in Liquefaction Mitigation

Sıvılaşma Riskinin Azaltılması için Kullanılan Jet Grout Kolonlarının Verimliliği Üzerine Bir Sayısal Çalışma

Gizem ŞAHİN
Onur TOYGAR
Mehmet Rifat KAHYAOĞLU
Pages
210–229
Publication Date
2022-12-13
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In addition, the effect of jet grout columns on the variation of shear stresses, shear deformations and excessive pore water pressure ratios in liquefiable soils were examined through the parametric analyses performed for different area and strength ratios of jet grout columns.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:A comprehensive site investigation was carried out on the site in Kocaeli, where a transformer assembly-disassembly building was located, and it was observed that there was liquefaction risk in the area.
📊
Key Findings & Data:Therefore, jet grout columns were selected as the soil improvement method.
💡
Conclusion & Impact:In addition, the effect of jet grout columns on the variation of shear stresses, shear deformations and excessive pore water pressure ratios in liquefiable soils were examined through the parametric analyses performed for different area and strength ratios of jet grout columns.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Jet Grout Kolon · Sıvılaşma · Sonlu Elemanlar Yöntemi

Abstract

A comprehensive site investigation was carried out on the site in Kocaeli, where a transformer assembly-disassembly building was located, and it was observed that there was liquefaction risk in the area. Therefore, jet grout columns were selected as the soil improvement method. After the production of the designed jet grout columns, it was investigated whether the liquefaction risk was eliminated through analytical and numerical analyses. The effectiveness of jet grout columns in preventing liquefaction was evaluated in terms of the generation of excess pore water pressure by using UBCSAND constitutive model on MIDAS GTS NX software which can perform effective stress-based finite element analyses. In addition, the effect of jet grout columns on the variation of shear stresses, shear deformations and excessive pore water pressure ratios in liquefiable soils were examined through the parametric analyses performed for different area and strength ratios of jet grout columns.

Özet

Kocaeli İli’ndeki bir trafo montaj-demontaj binasının bulunduğu arazide kapsamlı bir zemin etüdü yapılmış ve bu alanda sıvılaşma riskinin olduğu görülmüştür. Sıvılaşma riskini ortadan kaldırmak amacıyla jet grout kolonlar zemin iyileştirme yöntemi olarak seçilmiştir. Tasarımı yapılan jet grout kolonların imalatından sonra sıvılaşma riskinin ortadan kalkıp kalkmadığı, gerçekleştirilen analitik ve sayısal analizler ile incelenmiştir. Jet grout kolonların sıvılaşmayı önlemedeki etkinliği, efektif gerilme tabanlı sonlu elemanlar analizleri yapabilen MIDAS GTS NX programı ile UBCSAND bünye modeli kullanılarak, aşırı boşluk suyu basıncı oluşumu üzerinden değerlendirilmiştir. Ayrıca, jet grout kolonların sıvılaşabilir zemin tabakasındaki kayma gerilmeleri, kayma deformasyonları ve aşırı boşluk suyu basıncı dağılımları üzerindeki etkisi, jet grout kolonların farklı alan ve dayanım oranları için gerçekleştirilen parametrik analizlerle ortaya konmuştur.

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Cite This Article

ŞAHİN, G., TOYGAR, O., KAHYAOĞLU, M. R. (2022). A Numerical Study on the Efficiency of Jet Grout Columns in Liquefaction Mitigation. Türk Deprem Araştırma Dergisi, Cilt: 4 - Sayı: 2, 210–229. https://ajindex.com/articles/871745

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