Abstract:Because of the early construction age and low quality standard, the proportion of small reservoirs in danger is higher. Especially when the reservoir runs at high water level for a long time, it will raise the infiltration line in the dam body and pose a threat to the structural safety of the dam. Aiming at the phenomenon of loose leaching on the downstream slope of a small reservoir dam, the seepage behavior of the dam is calculated according to the operation of the reservoir over the years and on-site survey, and combined with the finite element software Geo-studio. The comprehensive analysis results show that the silting of the downstream drainage edge will raise the seepage line of the dam body, resulting in an increase in the position of the escape point of the back slope, which will adversely affect the permeability stability of the dam body. Combined with the engineering practice, the reasons for the silting of the drainage prism are analyzed and the corresponding suggestions are put forward, which provide a basis for the safe operation of the dam and a certain reference for other small reservoirs.
