외력 작용시 도심지 얕은 지하철 터널의 거동평가
The estimation of the behavior of urban shallow subway tunnels being applied external load
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초록
근접시공에 따른 터널의 안전영역은 지반의 강성변화, 작용하중, 작용하중의 위치 및 대상지층에 따라 다르게 변하지만 지금까지의 국내·외의 안전영역은 이러한 조건을 고려하지 않았다. 따라서 본 논문에서는 각 조건을 변화시키면서 터널의 안전영역을 설정하였다.
Abstract
Nowadays, the construction of new ground structures, which can influence the stability of existing underground structures, is increasing. Consequently, many technical problems occur during the design and construction stage of the new structures. In constructing a neighboring structure, reasonable design and construction is strongly required to balance between the stability of the existing underground structures and the economy of construction of the new structure in terms of the importance of the existing underground structures. Many researches have been performed to estimate the safe region and behavior of underground structures. Constructing a new ground structure above the existing underground structure, external loads are to be applied to the existing underground structure. In this study, therefore, the stability and safe region of the existing underground structure was re-established with respect to the relative location of the new ground structure with the underground structure, the depth from surface to top of the underground structures, and ground conditions.