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前些年建筑的贮灰坝,大都依据水利工程中土坝和堆石坝的设计原则一次性建造的。稍后改为使用当地材料建造初期坝和继后逐级建造的子坝。子坝的坝基为粉煤灰。由于库区内贮放的是水和灰,与通常的水坝有所差别。所以,若按挡水坝要求来设计,一般会有保守的一面。另一方面,粉煤灰比重小、颗粒细(平均粒径d_(50)一船小于0.1mm)、均匀、无粘性,饱和状态下受静力和动力作用都容易发生流动性的液化破坏。此外,采用的土、石坝料占用大量
The ash storage dams built in previous years were mostly built once according to the design principles of earth dams and rockfill dams in water conservancy projects. Instead, it will use local materials to build the initial dam and sub dams that will be built step by step. The dam base of the dam is fly ash. Due to the storage of water and ash in the reservoir area, it is different from ordinary dams. Therefore, if you design according to the dam requirements, there will generally be a conservative side. On the other hand, fly ash has a small specific gravity, fine particles (average particle size d_(50) and a vessel of less than 0.1 mm), uniform and non-viscous, and it is prone to liquid liquefaction failure under static and dynamic conditions in a saturated state. In addition, the soil and stone dam materials used occupy a large amount of