摘要
为进行水库大坝渗流安全评价与结构安全评价,本文以Autobank软件为媒介,以勘察地质参数为基础数据,对五曲湾水库进行渗流安全与结构安全复核计算。通过复核结果与现场实际调查结果相比较,得出五曲湾水库土石坝的渗流和结构的结论如下:五曲湾水库坝体下游坝脚设有排水棱体,有效降低了坝体浸润线;经分析计算,各工况下,坝体、坝基渗透坡降均小于允许渗透比降;坝基设有截水墙,但未完全截断强透水性砂砾石,渗漏量相对较大,存在渗流安全隐患,运行中未发现异常现象;大坝在稳定渗流期与水位降落期,坝坡稳定最小安全系数均大于其允许值,满足规范要求;大坝变形规律趋于正常,不存在危及安全的异常变形。因此,认为大坝渗流性态基本安全、大坝结构安全。
In order to carry out seepage safety evaluation and structural safety evaluation of reservoir dam,this paper takes Autobank software as the medium and geological parameters as the basic data to carry out seepage safety and structural safety review calculation of Wuquwan reservoir.By comparing the result of checking with the result of field investigation,the conclusion of seepage and structure of earth-rock dam of Wuquwan Reservoir is drawn as follows:the dam foot downstream of Wuquwan reservoir dam is equipped with drainage ribs,which effectively reduces the saturation line of the dam body.According to the analysis and calculation,the permeability gradient of dam body and foundation is less than the allowable permeability gradient under each working condition.The dam foundation is equipped with a cut-off wall,but it is not completely cut off the strong permeable sand gravel,the leakage is relatively large,there are seepage safety risks,but no abnormal phenomenon was found in operation.The minimum safety factor of dam slope stability is greater than the allowable value in the steady seepage period and the water level fall period,which meets the specification requirements.The deformation rule of the dam tends to be normal,and there is no abnormal deformation endangering safety.Therefore,the seepage behavior and structure of the dam are considered to be safe.
作者
高瑞
Gao Rui(Shanxi Wanshui Water Conservancy Survey and Design Consulting Co.,LTD.,Taiyuan,Shanxi 030024)
出处
《吉林水利》
2023年第5期7-11,共5页
Jilin Water Resources
