云南某大型水電站地下廠房圍巖穩(wěn)定性研究
[Abstract]:The underground cavern group of hydropower station is deeply buried in the rock mass. Because of the complex geological conditions, the interlaced caverns and the complicated layout, it is of great significance to study the stability of the surrounding rock mass of the underground cavern group. On the basis of deep analysis of engineering geological conditions of surrounding rock of underground cavern group, this paper combines with underground powerhouse of a large hydropower station, adopts three-dimensional finite element method, and combines the excavation process and supporting method of underground cavern group. The initial in-situ stress field of surrounding rock of underground cavern group is inversed, and the origin and distribution law of in-situ stress field are analyzed. This paper analyzes the deformation, stress characteristics, yield zone and stability of surrounding rock during the whole process from excavation to support, and evaluates the stability of main caverns such as underground powerhouse, main transformer chamber, tailrace surge chamber, etc. This paper demonstrates the feasibility of the excavation scheme, optimizes and recommends the reasonable support parameters, the timbering timing and the construction excavation procedure. The results provide a scientific basis for the implementation of the project.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TV731.6;TV223
【參考文獻(xiàn)】
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