Analysis and Prevention Measures of Piping Hazards in the Embankment of Poyang Lake
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NETL
NSTL
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为了进一步防治管涌险情,以鄱阳湖防洪圩堤为研究对象,建立了管涌预测的理论模型,运用GeoStudio2018 软件对防洪圩堤进行模拟分析,设置了降雨强度、降雨类型和降雨时刻三个关键因素和四种工况,分别用Seep/W模块和Sigma/W模块对防洪圩堤进行破坏计算.结果表明,只有在固定库水位下不同降雨会出现管涌现象,管涌出现破坏的有固定库水位 23 m+降雨时刻20～30 d +降雨强度0.06 m/d,管涌点位于下游坡坡脚0.2 m处;提出了反滤铺盖方案,并建立了相应的数值模拟模型.经验证,该方案符合相关规范要求.
In order to further prevent and control the risk of piping,a theoretical model for piping pre-diction is established using the flood control embankment of Poyang Lake as the research object.The GeoStudio 2018 software is used to simulate and analyze the flood control embankment,setting three key factors of rainfall intensity,rainfall type,and rainfall time,as well as four working conditions.The damage calculation of the flood control embankment is carried out using the See/W module and Sigma/W module,respectively.The results show that only under the fixed reservoir water level,different rain-fall will occur.The phenomenon of pipe surge,and the pipe surge will be damaged by the fixed reser-voir water level of 23 m+rainfall time 20～30 d+rainfall intensity 0.06 m/d,the pipe gushing point is located at the foot of the downstream slope 0.at 2 m;A reverse filtration covering scheme was pro-posed,and the corresponding numerical simulation model was established.The solution has been veri-fied to meet the requirements of the relevant specifications.
flood control embankmentpipingGeoStudioinverted filter blanket
NETL
NSTL
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