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http://dx.doi.org/10.12814/jkgss.2016.15.4.009

Study on Correlation between Large Earthquake-Induced Underground Structure Uplift and Geological Settings  

Kang, Gi-Chun (Department of Civil Engineering, Engineering Research Institute, Gyeongsang National University)
Kim, Ji-Seong (Research Institute for Infrastructure Performance, Korea Infrastructure Safety Corporation)
Publication Information
Journal of the Korean Geosynthetics Society / v.15, no.4, 2016 , pp. 9-16 More about this Journal
Abstract
During the 2004 Niigata-ken Chuetsu, Japan, earthquake, more than 1,450 underground structures, known as sewer manhole, were uplifted up to 1.5m in Nagaoka and Ojiya city. The uplift damage can be a serious matter because they not only hinder the flow of wastewater systems, as a part of lifeline systems, but also disturb traffic flows. For restoration works, an open-cut investigation of damaged wastewater system was conducted by the Nagaoka city government. The results from the investigation compiled valuable data sets for buried pipeline damage due to earthquakes. In the present study, the factors affecting the uplift amount of the underground structure is investigated by using the data sets which include locations of damaged sections and inclination of pipeline before and after the earthquake and the SPT borehole logs in the affected area. Correlation analysis between the underground structure uplift and the geological settings in the affected area revealed that ground water depth and original subsoil, including thickness of clay layer, SPT N-value and fill thickness are the key parameters for the uplift phenomenon.
Keywords
Earthquake; Underground structure; Uplift damage; SPT borehole logs; Correlation analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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