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水利水电工程施工中,虹吸法充水的应用较为常见,但能将充水强度和充水时间控制自如则比较困难,而能真正用好的关键则在于虹吸管的设计。三峡二期工程下游基坑充水方案,针对虹吸管的设计,从水力学角度对虹吸管的充水强度和时间等参数进行了周密演算,并将计算结果与实际统计结果做了对比,分析产生误差的主要原因是充水条件由大气出水变化为有水压出水造成,并进行了简单量化估算。经过实践证明,三峡工程二期下游基坑虹吸法充水的设计、施工是安全稳妥、成功的。
In the construction of water conservancy and hydropower projects, the application of water by siphon method is more common, but it is more difficult to control the water-filled intensity and water-filling time freely. The key to making good use of it is the design of the siphon pipe. According to the design of siphon, the parameters such as water-filled strength and time of siphon are calculated from the perspective of hydraulics, and the calculation results are compared with the actual statistical results to analyze the error The main reason is that the water filling condition changes from the atmospheric effluent to the hydraulically effluent water, and a simple quantitative estimation is made. After practice, it has been proved that the design and construction of the siphon method for the construction of the lower reaches of the Three Gorges Project is safe, secure and successful.