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Arabian Journal of Geosciences

, Volume 5, Issue 4, pp 545–554 | Cite as

Assessment of soil liquefaction potential based on numerical method- a case study of an urban railway project

  • A. Janalizadeh Choobbasti
  • Mohammad Javad VahdatiradEmail author
  • M. Torabi
  • S. Firouzian
  • A. Barari
Original Paper

Abstract

Paying special attention to geotechnical hazards such as liquefaction in huge civil projects like urban railways especially in susceptible regions to liquefaction is of great importance. A number of approaches to evaluate the potential for initiation of liquefaction, such as Seed and Idriss simplified method have been developed over the years. Although simplified methods are available in calculating the liquefaction potential of a soil deposit and shear stresses induced at any point in the ground due to earthquake loading, these methods cannot be applied to all earthquakes with the same accuracy, also they lack the potential to predict the pore pressure developed in the soil. Therefore, it is necessary to carry out a ground response analysis to obtain pore pressures and shear stresses in the soil due to earthquake loading. Using soil historical, geological and compositional criteria, a zone of the corridor of Tabriz urban railway line 2 susceptible to liquefaction was recognized. Then, using numerical analysis and cyclic stress method using QUAKE/W finite element code, soil liquefaction potential in susceptible zone was evaluated based on design earthquake.

Keywords

Liquefaction assessment Ground response analysis Cyclic stress Susceptible zone TURL2 QUAKE/W 

تقييم جهد تميع التربة باستخدام الطرق العددية – دراسة حالة مشروع سكك حديد المناطق الحضرية

الاهتمام الخاص بالاخطار الجيوتقنية مثل تميع التربة في المشاريع الانشائية الكبيرة مثل سكك حديد المناطق الحضرية خاصة في المناطق المشكوك في تعرضها لتميع التربة يعتبر ذات أهمية كبيرة. تم تطوير العديد من التوجهات لتقييم احتمال بدء التميع مثل طريقة Seed and Idriss المبسطة. بالرغم من وجود الطرق المبسطة لحساب احتمال تميع رسوبيات التربة واجهادات القص المستحثة عند أي نقطة في الأرض نتيجة أحمال الزلازل ، ولكن هذه الطرق لا يمكن تطبيقها لجميع الزلازل بنفس الدقة وأيضا تنقصها القدرة على التنبؤ بالضغط المسامي الناشئ في التربة. وبالتالي من الضروري عمل تحليل استجابة الأرض للحصول على الضغوط المسامية في التربة وإجهادات القص الناتجة عن حدوث الزلازل. وباستخدام تاريخ التربة والعوامل الجيولوجية والمركبة تم تحديد منطقة ممر السكك الحديدية في المناطق الحضرية في تابريز الخط 2 (TURL2) والتي يحتمل تعرضها للتميع التربة. ثم باستخدام التحليل العددي وطريقة تتابع الاجهادات والتي تستخدم كود العنصر المحدد QUAKE/W ، تم تحديد جهد تميع التربة في المناطق المشكوك فيها بناءاً على التصميم الزلزالي.

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Copyright information

© Saudi Society for Geosciences 2010

Authors and Affiliations

  • A. Janalizadeh Choobbasti
    • 1
  • Mohammad Javad Vahdatirad
    • 1
    Email author
  • M. Torabi
    • 2
  • S. Firouzian
    • 1
  • A. Barari
    • 3
  1. 1.Department of Civil EngineeringBabol University of TechnologyBabolIran
  2. 2.Faculty of Mining, Petroleum, and GeophysicsShahroud University of TechnologyShahroudIran
  3. 3.Department of Civil EngineeringAalborg UniversityAalborgDenmark

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