糜棱巖斷層帶引水隧洞關鍵施工技術研究
[Abstract]:In the upsurge of hydropower development, with the utilization of water resources, the construction of hydropower stations is further extended to remote and complex watersheds. More and more complicated geological conditions bring difficulties to engineering construction, and the risk control of water inrush in mylonite fault zone is related to the success of hydropower station. Therefore, it is of great significance for the risk control and construction of water inrush in similar projects to study various practical technical measures adopted in the construction process of hydropower development projects through mudding mylonite fault zone. Through the construction of diversion tunnel of a hydropower station, the risk control and comprehensive construction technology of water inrush in fault mylonite zone are studied in this paper. The research contents include: the exploration method of fault mylonite under complex geological conditions, the study of tunnel consolidation grouting technology in mylonite fault zone and the study of tunnel construction technology in mylonite fault zone. The results obtained are as follows: (1) the HSP advanced geological exploration technology has been successfully applied to the fault mylonite detection, and the geological conditions in front of and around the tunnel face have been found out, and the complex geological conditions of the tunnel have been overcome effectively. The tunnel is difficult on the curve. (2) the whole section consolidation grouting technique is adopted in the water inrush section to solve the problem of drilling difficulty, and the complex geological conditions of cavities are effectively improved by grouting to form a certain reinforcement structure in the area of cavern collapse; Before excavation, high pressure consolidation grouting and grouting working pressure 15MPa are used to improve the surrounding rock state of the mylonite zone of the muddy fault. (3) the multi-step partial excavation technique is put forward to improve the surrounding rock state of the mylonite belt of the muddy fault. The synchronous construction technology of first bottom arch and then top arch lining and multi-working procedure parallel operation technology are effectively applied to the construction of diversion tunnel in fault broken zone.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TV554
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