Shaking table tests on mitigation of liquefaction vulnerability for existing embedded lifelines
| Autor: | Damoun Taeseri, Toshihiko Hayashida, Masato Shimura, Taro Uchimura, Masahide Otsubo, Ikuo Towhata, Bertrand Cauvin, Hadrien Rattez, Bangan Liu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies business.industry Grout 0211 other engineering and technologies Vulnerability Liquefaction 02 engineering and technology engineering.material Geotechnical Engineering and Engineering Geology Civil engineering Pipeline transport Time frame engineering Forensic engineering Earthquake shaking table Retrofitting business Resilience (network) 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | Soils and Foundations. 56:348-364 |
| ISSN: | 0038-0806 |
| DOI: | 10.1016/j.sandf.2016.04.003 |
| Popis: | The 2011 off the Pacific Coast of Tohoku Earthquake caused significant damage to underground sewage lifelines in the Tokyo Metropolitan area. The importance of the earthquake- and liquefaction-resistance of embedded pipelines was recognised, as a significant amount of time passed before the commencement of temporary operations was resumed. One of the lessons learned was the liquefaction vulnerability of relatively inexpensive structures such as embedded sewage pipelines whose seismic resilience is important for the robustness and quick repair of urban infrastructures. The same problem is likely to occur in other regions where strong earthquakes are expected in the near future. Despite the urgency of this situation, it is not possible these days to excavate pipes and improve backfills quickly due to financial limitations. Hence, less expensive measures, such as mechanical constraints, the partial injection of grout, the installation of drain pipes, and the insertion of sheath pipes, are proposed in this paper. In the present study, shaking model tests were conducted for the purpose of validating those measures by which retrofitting may be achieved at reduced construction costs and in a shorter time frame. Through the tests, the proposed measures exhibited the satisfactory performance of mitigating liquefaction-induced damage to sewage pipelines. The results of the shaking table tests on different mitigation measures were discussed considering their practical applications. |
| Databáze: | OpenAIRE |
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