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http://dx.doi.org/10.12814/jkgss.2015.14.2.023

Estimation of Earth Pressures Acting on Box Structures Buried in Ground  

Hong, Won-Pyo (Department of Civil and Environmental Engineering, Chung-Ang University)
Yun, Jung-Mann (Department of Construction Information System, ShinAnsan University)
Song, Young-Suk (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean Geosynthetics Society / v.14, no.2, 2015 , pp. 23-33 More about this Journal
Abstract
The earth pressure acting on underground structure was measured by application of the instrumentation system in the subway construction site constructed by the method of cut-and-cover tunnel. The measured earth pressure was compared with the earth pressure obtained from the existed theoretical equation, and the actual earth pressure diagram acting on the underground structure was investigated. As a result of investigation, the vertical earth pressure is mainly affected by the embankment height, and the lateral earth pressure is significantly affected by whether the existence of earth retaining structures or not. The measured vertical earth pressure is very similar to the theoretical earth pressure proposed by Bierbaumer. The measured lateral earth pressure is closed to the active earth pressure proposed by Rankine rather than the earth pressure at rest. The coefficient of earth pressure in soil deposit layer is about 0.35, and the coefficient in soft rock deposit layer is about 0.21. For design and construction the underground structures, therefore, it is reasonable estimation that the lateral earth pressure acting on structures installed in soil deposit layers is an average value between active earth pressure and earth pressure at rest. In rock deposit layers, the lateral earth pressure acting on structure is an active earth pressure only.
Keywords
Underground box structure; Instrumentation; Vertical earth pressure; Lateral earth pressure; Coefficient of earth pressure;
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