터널과지하공간 (Tunnel and Underground Space)
- 제3권1호
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- Pages.80-95
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- 1993
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- 1225-1275(pISSN)
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- 2287-1748(eISSN)
터널 내공변위의 이론과 계측결과의 분석
Theory and Analysis Method of Tunnel Convergence
초록
Convergence measurements play very important role in the assessment of stability of a tunnel and of the economics of rock reinforcements. The characteristics of convergences are both due to the face advance effect and the time-dependent behaviour of rocks. As the convergence law can be modeled as a specific function of two variables of distance and time, we can determine the type of function and the related parameters from the field measurements. By using the regression method based on the Levengberg-Marquardt algorithm, an analysis of convergence of two different tunnels and one numerical example is described. It is shown that the convergence can be modeled as following function, C(x)=a{1-exp(-bx)} or C(t)=a{1-exp(-bt)} in case of a tunnel excavated in elastic rocks, in case of elasto-plastic or over stressed rocks.
키워드