竖井开挖过程的数值模拟分析

竖井开挖过程的数值模拟分析 English Version

详细信息

(Department of Building Engineering of Tongji University, Shanghai 200092, China)

摘要: 通过对某水电站双竖井施工阶段进行有限元数值模拟，对开挖过程中的井壁应力、应变及土体变形规律进行了分析，并对施工的安全性进行了初步的评估。结果表明：竖井的受力形态呈现出悬臂梁的受剪状态，随着开挖深度增加，土体沿井侧变形增大，在深度超过90 m后，竖井的井口处土体变形不再明显。工程采用的“边开挖边支护”的施工方案是符合安全储备的。
- 竖井 /
- 数值模拟 /
- 有限元 /
- 受力分析
Abstract: Through the finite element numerical simulation of dual-shaft of a hydropower station during the construction stage, the stress and strain of sidewall and the deformation laws of soils during excavation are analyzed, and the safety of construction is preliminarily assessed. The results show that the mechanical conditions of the shafts demonstrate the shear state of cantilever. With the increase of the excavation depth, the deformation of soils increases along the side of the wells, while the depth exceeds 90 m, the deformation of soils at the wellhead of the shafts is no longer obvious. The project using the “supporting while excavating” construction program complies with the safety margin.
- shaft /
- numerical simulation /
- finite element /
- stress analysis

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