某土石坝下游坡散浸原因分析及对策研究  

Study on Causes and Countermeasures of Loose Leaching on Downstream Slope of Earth-rock Dam

作　　者：戴霖 邓伟 舒华鑫 DAI Lin;DENG Wei;SHU Huaxin(Jiangxi Academy of Water Science and Engineering,Nanchang 330000,China;Jiangxi Hongtu Technical Consulting Co.,Ltd.,Nanchang 330000,China)

机构地区：[1]江西省水利科学院,江西南昌330000 [2]江西省洪图技术咨询有限公司,江西南昌330000

出　　处：《城市道桥与防洪》2025年第1期145-148,共4页Urban Roads Bridges & Flood Control

基　　金：江西省水利厅科技项目(202224ZDKT06)。

摘　　要：小型水库因建设年代早、质量标准低,病险水库比例较高。尤其是水库长期在高水位运行下,会抬高大坝坝体内浸润线,对大坝的结构安全构成威胁。针对某小型水库大坝下游坡面出现的散浸现象,以历年水库运行情况及现场查勘为基础,结合有限元软件Geo-studio对大坝渗流性态进行计算,通过综合分析结果表明:下游排水棱体淤堵会抬升坝体的浸润线,导致背水坡出逸点位置相应提高,从而对坝体的渗透稳定性态产生不利的影响。并结合工程实际,分析了排水棱体淤堵的原因并提出了相应的建议,为保障大坝安全运行提供依据,同时为其他小型水库提供一定的参考。Because of the early construction age and low quality standard,the proportion of small reservoirs in danger is higher.Especially when the reservoir runs at high water level for a long time,it will raise the infiltration line in the dam body and pose a threat to the structural safety of the dam.Aiming at the phenomenon of loose leaching on the downstream slope of a small reservoir dam,the seepage behavior of the dam is calculated according to the operation of the reservoir over the years and on-site survey,and combined with the finite element software Geo-studio.The comprehensive analysis results show that the silting of the downstream drainage edge will raise the seepage line of the dam body,resulting in an increase in the position of the escape point of the back slope,which will adversely affect the permeability stability of the dam body.Combined with the engineering practice,the reasons for the silting of the drainage prism are analyzed and the corresponding suggestions are put forward,which provide a basis for the safe operation of the dam and a certain reference for other small reservoirs.

关 键 词：Geo-Studio 土石坝 散浸 排水棱体 渗流性态 

分 类 号：TV64[水利工程—水利水电工程]