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http://dx.doi.org/10.5762/KAIS.2020.21.11.662

Evaluation of Uplift Force Acting on Foundation of Underground Structure  

Kim, Jin-Man (Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology)
Han, Heui-Soo (Department of Civil Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.11, 2020 , pp. 662-671 More about this Journal
Abstract
The uplift force acts directly on the foundation and causes a building to float to the upper ground. To examine the stability of a structure according to the uplift force, four sites (Paju, Anyang, Osan, and Gangneung) were selected, and sensors were installed on the foundations for the field tests. The rainfall characteristics were analyzed around June~September, and the changes in the water level of the adjacent river were considered. The maximum uplift force except for Gangneung did not exceed 72% of the water pressure when the groundwater level was up to the surface. On the other hand, the maximum uplift force in Osan was approximately 67%, but the reliability was slightly inferior because the difference from the average (46%) was large. The minimum uplift force was within 10% except for Anyang (~ 41%). At the Gangneung site on soft rock where the permanent drainage facility was installed before the measurement, the maximum and minimum uplift force was approximately 14% and 3.5%, respectively. Based on the measurement results, the possibility of overdesigning or underdesigning comes from the design by the hydrostatic pressure when the groundwater level is up to the surface.
Keywords
Uplift Force; Water Level; Foundation; Rainfall; River;
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