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http://dx.doi.org/10.9711/KTAJ.2018.20.4.717

A study for calculating factor of safety against basal heave during circular vertical shaft excavation in clay considering 3D shape  

Kang, Seok-Jun (Department of Civil and Environmental Engineering, KAIST)
Cho, Gye-Chun (Department of Civil and Environmental Engineering, KAIST)
Kim, Jung-Tae (Department of Civil and Environmental Engineering, KAIST)
Kim, Han-Sung (HBC Inc.)
Hong, Eun-Soo (Department of Civil and Environmental Engineering, KAIST)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.20, no.4, 2018 , pp. 717-729 More about this Journal
Abstract
Considering the stability of the ground in the process of excavation design is essential because there is a risk of basal heave due to the load of the surrounding ground during the vertical excavation. However, calculation of the factor of safety for basal heave should be performed with two-dimensional equation, and the equation cannot reflect three-dimensional shape of vertical excavation. In this study, an equation for factor of safety for the basal heave was proposed with considering the effect of three-dimensional shape. It is confirmed that the equation can more appropriately reflect the basal heave stability 3D circular vertical excavation than the existing equation. Using the equation proposed in this study, it is possible to derive an appropriate factor of safety according to the 3D excavation shape during the circular vertical shaft excavation.
Keywords
Circular vertical shaft; Basal heave; Factor of safety; 3D effect; Numerical analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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