期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：2
页码：1-7
DOI：10.1088/1755-1315/304/2/022017
出版社：IOP Publishing
摘要：In order to study the stability of the slope during the reservoir water level decline, the finite element analysis is carried out by using Seep/w, Slope/w and Quake/w modules in Geo-slope software, to analyze a self-designed slope during the process of that under normal conditions and occasional earthquakes. The variation curve of safety factor is obtained in the process under different working conditions. The results show that: (1) Under normal circumstances, during the process of reservoir water level decline, the safety factor of the slope will decrease firstly and then slowly increase. There is one most dangerous water level at the water level slope ratio of 1/2~1/3; (2) When adjusting the different water level decline rate and keeping the same water level drop elevation, the higher the water level decline rate is, the lower the stability of the bank slope is, and the smaller the minimum safety factor is during the water level drop process; (3) In the case of an earthquake, the seismic load does not change the overall change trend of the slope safety factor during the process of the reservoir water level drop. What goes beyond the normal pattern of cognition is that, the peak acceleration of the earthquake and the minimum safety factor generally do not occur simultaneously. It can be clearly seen that the seismic intensity plays a more important role in affecting the stability of the slope compared to the reservoir water level decline rate. The research results have certain guiding significance for the regulation of reservoir water level and the safety control of slope under earthquake conditions.
