石漫滩碾压混凝土重力坝渗流异常成因分析

Cause Analysis of Seepage Anomaly of Shimantan RCC Gravity Dam

针对石漫滩碾压混凝土重力坝渗流异常问题,根据其运行表现,系统分析了大坝渗流观测资料,并利用有限元模型正反分析其渗流异常,发现坝体混凝土等效渗透系数不满足现行规范要求,基于坝体多处出现射水、渗漏量增大明显的现状,建议尽快除险加固,以确保工程安全。

Aiming at the problem of seepage anomaly of Shimantan reservoir roller compacted concrete gravity dam, according to the operation performance, this paper analyzes observation data of dam seepage systematically. And then the finite element model is used to analyze its seepage anomaly. It finds out that the equivalent permeability coefficient of dam concrete does not meet the requirements of specification. Finally, the dam body appears water jet and leakage increases obviously. So, it suggests dam reinforcement as soon as possible, which can ensure the project safety.