Journals / Fırat Üniversitesi Fen ve Mühendislik Bilimleri Dergisi / 2005 / Cilt: 17 - Sayı: 3

Sample disturbance of overconsolidated fine grained soils

Aşırı konsolide ince daneli zeminlerde örselenme

Pages
471–479
Publication Date
2022-10-17
DOI
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AI Summary & Key Takeaways

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

By comparison of test results, some relationships are obtained.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In fine grained soils; due to the sample disturbance the specimen can't represent the soils which exist at the field.
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Key Findings & Data:Sample disturbance has been investigated since the beginning of the geotechnics.
💡
Conclusion & Impact:By comparison of test results, some relationships are obtained.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In fine grained soils; due to the sample disturbance the specimen can't represent the soils which exist at the field. Sample disturbance has been investigated since the beginning of the geotechnics. Disturbance in overconsolidated soils has been less intensively investigated than normally consolidated soils. In this work, shear strength and maximum shear modulus differences, which is occurred from stress relief, are researched. In order to research the effect of stress relief, homogenous samples were obtained using the Rowe consolidation cell. Some of these samples were overconsolidated in triaxial cell and undrained test performed. Other samples were overconsolidated. All stresses were released. Samples were reloaded at same stress level after this period. After consolidation, undrained triaxial test was carried out. Before triaxial test, initial shear modulus of all samples was measured using a free torsion pendulum. Initial shear modulus and stress-strain relationships are determined on overconsolidated soil specimens. By comparison of test results, some relationships are obtained.

Özet

Zeminden alınan numunenin, örselenme nedeniyle alındığı zemini temsil etmediği bilinmektedir. Geoteknik bilim dalı kurulduğundan beri örselenme üzeriden çalışmalar devam etmektedir. Aşırı konsolide zeminlerde gerilme boşalmasından kaynaklanan örselenme etkileri ise, normal konsolide zeminlere göre, nispeten daha az araştırılmıştır. Bu çalışmada, aşırı konsolide ince daneli zeminlerdeki örselenmenin kayma mukavemeti ve maksimum kayma modülü üzerindeki etkileri incelenmiştir. Bu amaçla Rowe konsolidasyon hücresi kullanılarak laboratuarda yeniden oluşturulan ve üç eksenli hücrede arazideki gerilme şartlarında anizotropik olarak konsolide edilen numuneler, üç eksenli deney hücresinde aşırı konsolide edilmiştir. Örselenmemiş olarak kabul edilen ve gerilme boşalması yaşadığı için örselenmiş olarak kabul edilen numuneler üzerinde üçeksenli deneyler yapılarak her bir numune için gerilme-şekil değiştirme eğrileri ve burulmalı üçeksenli deney sistemi yardımıyla maksimum kayma modülü değerleri belirlenmiştir. Deney sonuçlarından yararlanarak, örselenmiş ve örselenmemiş olarak kabul edilen numunelerin kayma modülleri ve kayma mukavemetleri arasında bağıntılar kurulmuştur.

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Cite This Article

AKSOY, H. S., ÖZÜDOĞRU, K. (2022). Sample disturbance of overconsolidated fine grained soils. Fırat Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Cilt: 17 - Sayı: 3, 471–479. https://ajindex.com/articles/513599

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References (2)

  1. A.W. Bishop and D.J. Henkel, The Measurement of Soil Properties in the Triaxial Test, Edward Arnold, London, 325s, 1957. 2.B.B. Broms and M.V. Rantam, Shear strength of an anisotropically consolidated clay, Journal of The Soil Mechanics and Foundation Engineering Division, ASCE, 89, 1-26, 1963. 3.W.M. Kirkpatrick, AJ. Khan and A.A. Mirza, The effects of stress relief on some overconsolidated clays,Geotechnique, 36, 511-525, 1986. 4.S. Rampello and L. Castillo, A study on the subsoil of the Tower of Pisa based on results from standard and high-quality samples, Canadian Geotechnical Journal, 35, 1074-1092, 1998. 5.L. Zeevaert, Free vibration torsion tests to determine the shear modulus of elasticity of soils, Proc. of The 3th Panamerican Conference on Soil Mech. and Found. Engineering, Caracas, Venezuela, 1967. 6.K.G. Özüdoğru, Laboratory shear modulus and damping from torsional vibration soil tests, Norwegian Geotechnical Institute Internal Report, 51513-1,
  2. Oslo, Norway, 1981. 7.W.F. Van Impe and M. Van den Broeck, Free torsion pendulum testing, 2nd Young Geotechnical Engineer's Conference, Oxford, England, August 23-26, 131-137, 1988.