| Summary: | 碩士 === 雲林科技大學 === 營建工程系碩士班 === 98 === In this thesis the numerical simulation of the Ming-hu underground power plant excavation was performed and three neighboring tunnel excavation affected by the anisotropic material was studied. The numerical results using two-dimensional finite element program GeoStudio-2004 SIGMA/W to simulate tunnel excavation behavior, were confirmed by the literature data.
This research included the influence of anisotropic material on the tunnel excavation behavior, and using the linear-elastic, the anisotropic- elastic and the elastic-plastic material models. The pre-stressed ground anchors were also installed to study the influence on the displacement. The analysis results showed that, after excavating, the amount of deformation in this research were similar among three material models.
After installing the pre-stressed ground anchors, displacement increased at some points in the anisotropic-elastic model.
However, in all material models, when excavating to the weak zones, the great amount of deformation, would occur. It needed suitable support system in time to prevent dangerous situation. Furthermore, because of the present demand of transportation, the longer distance and the multi-tunneling increases, which should have the suitable support system to maintain the security in construction.
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