Changes of Permeability and Effective Stress Compacted Clayey Soils Depending on the Compaction Energy
Öz
In this study changes in engineering parameters such as permeability and effective stress due to application of the compaction energy, one of the important parameters of compaction in different proportions have been investigated. Undisturbed clay samples obtained from the Sam-Tekin clay quarry, where the clay core material of the Ataturk Dam was taken, have been used in the study. In order to classify the samples, Atterberg Limits, grain size analysis and spesific gravity tests have been performed. The maximum dry unit weights and optimum moisture contents of compacted samples for 5 different compaction energies (15, 25, 35, 45, 55 blows) have been determined by means of compaction tests. Permeability and consolidation tests have been performed on compaction samples taken from the compacted at the determined dry unit weights and optimum moisture contents. In conclusion, it was determined that as the higher the compaction energy increases, the dry unit weight and preconsolidation pressure increase and the optimum moisture content, void ratio and permeability decrease.
Anahtar Kelimeler
Kaynakça
- 1. Das, B., M., 2010. Principles of Geotechnical Engineering, 7th Edition. Cengage Learning 200 First Stamford Place, Suite 400 Stamford, CT 06902 USA.
- 2. Lambe, T.W., 1958a. The Structure of Compacted Clay. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers, Paper 1654, Vol. 84, No. SM 2, 1–34.
- 3. Lambe, T.W., 1962. Soil Stabilization, Chapter 4 of Foundation Engineering, G.A. Leonards (ed) Mc. Graw-Hill, New York.
- 4. Lambe, T.W., 1958b. The Engineering Behavior of Compacted Clay. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers, Paper 1655, Vol. 84, No. SM 2, 1–34.
- 5. Cetin, H., Fener, M., Soylemez, M., Gunaydın, O., 2007. Soil Structure Changes During Compaction of a Cohesive Soil. Engineering Geology 92, 38–48.
- 6. Seed, H.B., Chan, C.K., 1959. Structure and Strength Characteristics of Compacted Clays. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers, Vol. 85, No. SM 5, 87–128.
- 7. Holtz, R.D., Kovacs, W.D., 1981. (Çeviri: Kayabalı, K., 2002). Geoteknik Mühendisliğine Giriş, Gazi Kitabevi, Ankara 723. III. 60-64.
- 8. Casagrande, A., 1936. The Determination of the Pre-Consolidation Load and its Practical Significance, Discussion D-34, Proceedings of the First International Conference on Soil Mechanics and Foundation Engineering, Cambridge, Vol. 3 60–64.
Öz
Bu çalışmada kompaksiyonun önemli parametrelerinden biri olan sıkıştırma enerjisinin farklı oranlarda zemine uygulanması sonucu, zeminin mühendislik özelliklerinden permeabilite ve ön konsolidasyon basıncında (σön) meydana gelen değişiklikler araştırılmıştır. Çalışmada Atatürk Barajı kil çekirdeğinde kullanılan Sam-Tekin ariyet ocağından örselenmiş zemin numuneleri alınmıştır. Killi zemini sınıflamak için kıvam, tane boyu ve özgül ağırlık deneyleri yapılmıştır. Standart Proctor deneyleri yapılarak zeminin farklı kompaksiyon enerjisinde (15, 25, 35, 45 ve 55 vuruşlarda) maksimum kuru birim hacim ağırlıkları ve optimum su içerikleri belirlenmiştir. Belirlenen bu maksimum kuru birim hacim ağırlık ve optimum su içeriği değerlerinde tekrar Standart Proctor deneyleri yapılmış ve konsolidasyon ringlerine numuneler alınarak permeabilite ve konsolidasyon deneyleri yapılmıştır. Sonuç olarak zemine uygulanan kompaksiyon enerjisi arttıkça; zeminin kuru birim hacim ağırlığının arttığı, optimum su içeriğinin azaldığı, ön konsolidasyon basıncının arttığı, boşluk oranın azaldığı ve permeabilitesinin tespit edilmiştir.
Anahtar Kelimeler
Kaynakça
- 1. Das, B., M., 2010. Principles of Geotechnical Engineering, 7th Edition. Cengage Learning 200 First Stamford Place, Suite 400 Stamford, CT 06902 USA.
- 2. Lambe, T.W., 1958a. The Structure of Compacted Clay. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers, Paper 1654, Vol. 84, No. SM 2, 1–34.
- 3. Lambe, T.W., 1962. Soil Stabilization, Chapter 4 of Foundation Engineering, G.A. Leonards (ed) Mc. Graw-Hill, New York.
- 4. Lambe, T.W., 1958b. The Engineering Behavior of Compacted Clay. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers, Paper 1655, Vol. 84, No. SM 2, 1–34.
- 5. Cetin, H., Fener, M., Soylemez, M., Gunaydın, O., 2007. Soil Structure Changes During Compaction of a Cohesive Soil. Engineering Geology 92, 38–48.
- 6. Seed, H.B., Chan, C.K., 1959. Structure and Strength Characteristics of Compacted Clays. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers, Vol. 85, No. SM 5, 87–128.
- 7. Holtz, R.D., Kovacs, W.D., 1981. (Çeviri: Kayabalı, K., 2002). Geoteknik Mühendisliğine Giriş, Gazi Kitabevi, Ankara 723. III. 60-64.
- 8. Casagrande, A., 1936. The Determination of the Pre-Consolidation Load and its Practical Significance, Discussion D-34, Proceedings of the First International Conference on Soil Mechanics and Foundation Engineering, Cambridge, Vol. 3 60–64.
Ayrıntılar
| Bölüm | Makaleler |
|---|---|
| Yazarlar | |
| Yayımlanma Tarihi | 15 Eylül 2017 |
| Yayımlandığı Sayı | Yıl 2017 Cilt: 32 Sayı: 3 |