摘要
水库边坡保持稳定是水库正常使用的前提和基础,降雨是边坡稳定性的重要影响因素。通过Geo-studio软件构建土质边坡模型,模拟在降雨条件下土质边坡稳定性特征参数的变化情况,研究结果表明:边坡土体在降雨的整个周期过程中稳定性特征参数不断减小,直至在雨停后的1d左右达到最小值,随着停雨期的不断延长,边坡稳定性特征参数不断缓慢增大,最终呈现平衡状态。在不同降雨强度的模拟中,降雨量越大,边坡稳定性特征参数在降雨期降低的速率越大,降低后的幅值越小,边坡稳定性特征参数在停雨期增加速率越小,且最终平衡状态的平衡值越小。对于不同降雨周期的情况,降雨时间越长,降低的时间越长,降低后的幅值越小,边坡稳定性特征参数在停雨期增加到稳定状态所需的时间越长,最终保持平衡的平衡值越小。
Reservoir slope stability is the prerequisite and foundation for the normal use of the reservoir,and rainfall is an important factor affecting slope stability.Therefore,this paper uses Geo-studio software to build a soil slope model to simulate the change of soil slope stability characteristic parameters under rainfall conditions.The research results show that the slope soil stability characteristic parameters continue during the entire cycle of rainfall.Decrease until it reaches the minimum value about a day after the rain stops.With the continuous extension of the rain stop period,the slope stability characteristic parameters continue to increase slowly,and finally appear to be in a balanced state.In the simulation of different rainfall intensities,the greater the rainfall,the greater the rate at which the slope stability parameter decreases during the rainfall period,and the smaller the amplitude after the decrease,the smaller the increase rate of the slope stability parameter during the rain stop period.And the balance value of the final equilibrium state is smaller.In the case of different rainfall periods,the longer the rainfall time,the longer the reduction time,and the smaller the amplitude after reduction.The longer it takes for the slope stability characteristic parameters to increase to a stable state during the rain stop period,and finally maintain a balance.The smaller the balance value.
作者
李涛
LI Tao(Liaoning Liaodong Water Holding Co.,Ltd.,Benxi 117000,China)
出处
《水科学与工程技术》
2021年第4期78-81,共4页
Water Sciences and Engineering Technology
关键词
边坡
降雨量
降雨周期
数值模拟分析
slope damage
rainfall
rainfall cycle
numerical simulation
