Enine Zemin Hareketine Maruz Gömülü Boru Hatlarının Tepkisi İçin Örnek Bir Çalışma

Yaşam hatları olarak adlandırılan gömülü boru hatları, parçalı ve sürekli boru hatları olarak sınıflandırılmaktadır. Söz konusu bu altyapıların güvenliği insan hayatı için üst yapılar kadar önemlidir. Bu çalışmada, İstanbul ili Esenyurt ilçesi 2126. Sokak’ta meydana gelen düşey zemin deplasmanı nedeniyle bu bölgede gömülü olan parçalı ve sürekli boru hatları incelenmiştir. İnceleme alanında 20 cm zemin oturması tespit edilmiştir. Bu zemin oturmasına konu olan bölgede hem sürekli (24” çelik, Ø1400 çelik ve PE125 polietilen) hem de parçalı (Ø300 beton ve 100DF düktil) gömülü boru hatlarının davranışı enine kalıcı zemin deformasyonuna göre incelenmiş ve elde edilen sonuçlar irdelenmiştir. Yapılan analizler sonucunda bölgede mevcut olan boru hatlarının söz konusu zemin hareketine karşı güvenli olduğu ancak lokal burkulma incelemeleri sonucunda polietilen doğalgaz boru hattında (PE125) hasar oluşabileceği tespit edilmiştir.

Anahtar Kelimeler:

Gömülü boru hattı, Enine zemin hareketi, Hasar analizi, Emniyet

A Sample Study for the Response of Buried Pipelines Subject to Transverse Ground Motion

Buried pipelines, called lifelines, are classified as segmented and continuous pipelines. The safety of these infrastructures is as vital as superstructures for human life. This study analyses the segmented and continuous pipelines buried in the 2126th street of the Esenyurt district of Istanbul in terms of vertical ground displacement. 20 cm ground settlement has been determined in the investigated area. The response of both the continuous (24” steel, Ø1400 steel and PE125 polyethylene) and the segmented (Ø300 concrete and 100DF ductile) buried pipelines in the region subject to this ground settlement has been investigated according to transverse permanent ground deformation and the obtained results have been examined. As a result of the analyzes, it has been determined that the pipelines in the region are safe against ground movement but that damage may ocur for the polyethylene natural gas pipeline (PE125) according to local buckling examinations.

Keywords:

Buried pipeline, Transverse ground movement, Damage analysis, Safety,

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1. Yigit, A., 2022. Response of Segmented Pipelines Subject to Earthquake Effects, Geomechanics and Engineering, 30(4), 353-362.
2. Wham, B., P., Davis, A.,C., 2019. Buried Continuous and Segmented Pipelines Subjected to Longitudinal Permanent Ground Deformation. Journal of Pipeline Systems Engineering and Practice, 10(4).
3. Banushi, G., Wham, B., P., 2021. Deformation Capacity of Buried Hybrid-Segmented Pipelines Under Longitudinal Permanent Ground Deformation. Canadian Geotechnical Journal, 58(8), 1095-1117.
4. Toprak, S., Nacaroglu, E., Ballegooy, S.V., Koc, C.A., Jacka, M., Manav, Y., Torvelainen, E., O’Rourke, T.D., 2019. Segmented Pipeline Damage Predictions using Liquefaction Vulnerability Parameters. Soil Dynamics and Earthquake Engineering, 125, 105758
5. Toprak, S.,Nacaroglu, E., Koc, C., A., 2015. Seismic Damage Probabilities for Segmented Buried Pipelines in Liquefied Soils. 6th International Conference on Earthquake Geotechnical Engineering, 1-4 November, Christchurch, New Zealand, 9.
6. O’Rourke, M., Londono, T.V., 2016. Analytical Model for Segmented Pipe Response to Tensile Ground Strain. Earthquake Spectra, 32(4), 2533.
7. O’Rourke M.J., Liu X., 1999. Response of Buried Pipelines Subject to Earthquake Effects. Multidisciplinary Center for Earthquake Research, University of Buffalo, Buffalo, 276.
8. O’Rourke M., 1989. Approximate Analysis Procedure for Permanent Ground Deformation Effect on Buried Pipelines, Proceedings of 2nd Japan-U.S. Workshop on Liquefaction, Large Ground Deformationand Their Effects on Lifeline Facilities, Buffalo, New York, Technical Report NCEER-89-0032, Multidisciplinary Centre for Earthquake Engineering Research, Buffalo, New York 1989, 336-347
9. O’Rourke, T.D., M.D. Grigoriu, M.M. Khater, 1985. Seismic Response of Buried Pipe-lines. Pressure Vessel and Piping Technology, Ed. C. Sundararajan, ASME, NewYork, NY, 281-323.
10. Yigit, A., Lav, M.,A, Gedikli, A., 2018. Vulnerability of Natural Gas Pipelines Under Earthquake Effects, Journal of Pipeline Systems Engineering and Practice, 9(1).
11. Yigit A., 2015. Deprem Etkisi Altındaki Gömülü Sürekli Boru Hatları. Doktora Tezi, İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, İstanbul, 140.
12. Gedikli, A., Lav, M.A., Yiğit, A., 2008. Seismic Vulnerability of a Natural Gas Pipelıne Network. ASCE Pipelines 2008. Atlanta, July 22-27.
13. Yiğit, A., 2007. Gömülü Boru Hatlarının Deprem Etkilerine Karşı Davranışı. Yüksek Lisans Tezi, İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, İstanbul, 228.
14. American Society of Civil Engineers (ASCE), 1984. Guidelines for the Seismic Design of Oil and Gas Pipeline Systems. Committee on Gas and Liquid Fuel Lifeline, Reston, 473.
15. O’Rourke, M., Nordberg, G., 1991. Analysis Procedures for Buried Pipelines Subject to Longitudinal and Transverse Permanent Ground Deformation. Proceedings of the Third Japan-U.S. Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures for Soil Liquefaction, San Francisco, California, Technical Report NCEER-91-0001, Multidisciplinary Center for Earthquake Engineering Research, Buffalo, New York, 439-453.
16. Indian Institute of Technology Kanpur, 2007. IITK-GSDMA Guidelines for Seismic Design of Buried Pipelines, Kanpur, 105.
17. Hall, W., Newmark, N., 1977. Seismic Design Criteria for Pipelines and Facilities, Current State of Knowledge of Lifeline Earthquake Engineering, ASCE, New York, 18-34.
18. Yiğit, A. 2021. Çelik Doğal Gaz Boru Hatlarının Güvenli Gömme Derinliği. El-Cezeri, 8(1), 471-480.
19. Türkdoğan, F. İ., Yetilmezsoy, K., 2004. Su Getirme ve Kanalizasyon Uygulamaları. İstanbul: Su Vakfı Yayınları, İstanbul, 455.
20. American Lifelines Alliance (ALA), 2005. Seismic Guidelines for Water Pipelines. A Report by Public-Private Partnership between Federal Emergency Management Agency (FEMA) and National Institute of Building Sciences (NIBS), Washington, 48.