In order to study the influence on the different parts of the cavern by joints, the three-dimensional model is built by Patran and then calculated with FLAC3D after meshing. Seven working conditions about different inclination of joints (0°15°30°45°60°75°90°) are considered in the calculation. The results show that low dip joints in vault and steep joints in the sidewall are more dangerous. Therefore, some measures should be used when encountered this situation in this project.
In order to get a quantitative and simple supporting scheme of deep foundation pit, this paper creatively develop a simplified method of supporting system selection based on the fuzzy optimization theory. The simplified method determines a preferred equation of the supporting system at first. Then the best solution is selected based on the preferred equation. Based on the simplified method, the analysis of the foundation excavation for Chuangye Dasha in Taiyuan has been performed. The result of the analysis shows that the method is reasonable and scientific.
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