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坝体滑坡是工程中常见的工程事故和工程灾害。本文采用摩根斯坦-普赖斯法对某沥青混凝土心墙坝进行坝坡静力稳定分析,研究坝坡在竣工期、稳定渗流期和水位骤降期的坝坡稳定规律;采用拟静力法和有限单元应力法对坝坡进行动力稳定分析,对两种方法进行对比,总结了坝坡在地震工况下的稳定规律。分析结果表明:稳定渗流期上游最小安全系数较竣工期有所提高,而下游侧较竣工期有所下降。水位骤降期,随着浸润线的下降,最小安全系数迅速降低,达到最低点后又开始有所提高,直至达到稳定;地震工况下坝体稳定性降低。采用有限单元应力法分析所得的最小安全系数小于拟静力法计算所得的安全系数。
Dam landslide is a common engineering accident and engineering disaster. In this paper, Morgan Stanley-Price method was used to analyze the stability of a concrete-filled asphalt concrete dams dam, and the stability of the dam slope during the completion, steady seepage and water level plunge was studied. The quasi-static method And the finite element stress method to analyze the dynamic stability of the dam slope, the two methods are compared and the stability law of the dam slope under seismic conditions is summarized. The results show that the minimum safety factor in the upstream of stable seepage period is higher than the completion time, while the downstream end is lower than the completion time. When the water level plunges, the minimum safety factor decreases rapidly with the decrease of the saturation line. After reaching the lowest point, it starts to increase again until the stability is reached. The stability of the dam body decreases under the earthquake conditions. The finite element stress analysis of the minimum safety factor obtained is less than the pseudo-static method calculated safety factor.