軟岩の非線形力学特性を考慮したトンネル理論解析
1988 年 1988 巻 400 号 p. 39-43
詳細
1988 年 1988 巻 400 号 p. 39-43
In order to make clear squeezing characteristics of a tunnel in soft rocks and to determine reasonable tunnel construction sequences, a theoretical analysis and tunnel model tests have been performed. In the analysis, the following factors are taken into account; (1) a non-linear stress-strain relationship which changes with confining pressure, (2) a non-linear yield criterion, (3) the ratio of strength and initial tangent modulus of a stress-strain curve is independent of confining pressure. Closed form solutions of stresses, strains and displacement have been obtained. Theoretical results obtained both by the non-linear analysis proposed and by the Kastner's elastoplastic analysis are compared with model test results. From the results of the comparison, appropriateness of the non-linear tunnel analysis is shown.
