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http://dx.doi.org/10.14481/jkges.2019.20.2.29

A Study on the Behavior of Surface Settlement due to the Excavation of Twin TBM Tunnels in the Clay Grounds  

You, Kwangho (Department of Civil and Environmental Engineering, University of Suwon)
Jung, Suntae (Department of Civil and Environmental Engineering, University of Suwon / Dongah Geological Engineering Co. Ltd.)
Publication Information
Journal of the Korean GEO-environmental Society / v.20, no.2, 2019 , pp. 29-40 More about this Journal
Abstract
Mechanized constructions have been frequently increased in soft ground below sea bed or river bed, for urban tunnel construction, and for underpinning the lower part of major structures in order to construct a safer tunnel considering various risk factors during the tunnel construction. However, it is difficult to estimate the subsidence behavior of the ground surface due to excavation and needs to be easily predicted. Thus, in this study, when a twin tunnel is constructed in the soft ground, it is proposed a simpler equation relating to the settlement behavior and a corrected formula applicable to soft ground and large diameter shield tunnels based on the previously proposed theory by Peck (1969). For this purpose, it was analyzed to long-term measurement values such as the amount of maximum settlement, the subsidence range by ground conditions, and interference volume loss due to the parallel construction, etc. As a result, a equation was suggested to predict the amount of maximum settlement in the soft sediment clay ground where is located at the upper part of the excavation site. It is turned out that the proposed equation is more suitable for measurement data in Korea than Peck (1969)'s.
Keywords
TBM; Lateral settlement; Volume loss; Volume loss of interference;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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