不同库水位升降速度对大坝边坡稳定性的影响研究

发布时间：2018-05-16 07:35

本文选题：水库边坡 + 水位变动速度　；参考：《水利水电技术》2017年02期

【摘要】：为了提高水库的安全管理水平,以极限平衡为理论基础,使用GEO-SLOPE软件中的SEEP/W模块和SLOPE/W模块,分别计算了某水电站水库右岸边坡土体在不同水位升降速度情况下边坡稳定安全系数的变化规律。结果显示:在正常蓄水状态下,边坡稳定安全系数曲线变化趋势是先降低,然后升高,随后曲线趋于稳定。水位上升速率越快,边坡土体稳定安全系数越高,边坡越趋于稳定。但当蓄水速度超过一定数值时,边坡稳定性会降低。当库水位降低时,边坡稳定安全系数先降低,到达极小值之后再平稳上升。因此,为了保证大坝边坡的稳定,在建设水库中,水库在蓄水和排水过程要随时监测边坡内部的结构面状况;在水库运行调度中,应合理控制水位升降的速度。
[Abstract]:In order to improve the safety management level of reservoir, the SEEP/W module and SLOPE/W module in GEO-SLOPE software are used based on the theory of limit balance. The variation law of slope stability safety factor is calculated under the condition of different water level rising and falling velocities on the right bank slope of a hydropower station. The results show that under the condition of normal water storage, the variation trend of slope stability safety factor curve is first decreasing, then increasing, and then the curve tends to be stable. The faster the water level rises, the higher the safety factor of slope soil is and the more stable the slope is. However, when the water storage speed exceeds a certain value, the slope stability will be reduced. When the reservoir water level is lowered, the slope stability safety factor decreases first, then rises steadily after reaching the minimum. Therefore, in order to ensure the stability of the dam slope, in the process of water storage and drainage in the construction reservoir, the condition of the structural plane inside the slope should be monitored at any time, and the speed of water level rise and fall should be controlled reasonably in the operation and operation of the reservoir.
【作者单位】：石家庄职业技术学院;
【分类号】：TV223.21

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