摘要
为了定量评价某水库均质坝当前的渗流稳定情况,基于非饱和渗流有限元理论,采用GeoStudio软件计算了水库大坝在稳定及非稳定渗流状态下的渗透稳定情况,得到了坝体渗流场、渗透比降、渗流量和坝坡稳定安全系数。结果表明:(1)在坝体内形成非稳定渗流工况时,坝体浸润线明显高于上游水位,此时上游坝坡处于最不利的安全状态;(2)坝体处于稳定渗流时,上游坝坡安全系数增大,下游坝坡安全系数逐渐减小;(3)各运行工况下大坝渗透比降均小于允许值,安全系数均大于规范最低要求值。研究成果可为大坝坝体的安全评价提供参考。
In order to quantitatively evaluate the seepage stability of homogeneous dam of a reservoir at present,based on the unsaturated seepage FEM,seepage dam in steady and unsteady seepage state stability was calculated by using GeoStudio.The dam seepage field,seepage gradient,seepage flow and slope stability safety factor,the results show that the（1）the formation of unsteady seepage condition in the dam,upstream water level was significantly higher than that of the saturation line,the upstream dam slope is in a safe state the most unfavorable;（2）the dam is in steady seepage,dam slope safety coefficient increases,the safety coefficient of the downstream dam slope gradually decreased;（3）under different operating conditions the dam seepage gradient is less than the allowable value,the safety coefficient is greater than the minimum allowable value standard.The research results can provide reference for the safety evaluation of the large dam body.
出处
《吉林水利》
2018年第6期53-56,共4页
Jilin Water Resources
