First impounding of the earth-fill dams is considered as one of the most critical stages of these earth structures during their lifespan such that it demands careful monitoring of the dam’s safety. In this study, behavior of Siahoo dam, an earth-fill dam in Iran, is evaluated by numerical modeling at the stage of first impounding to (1) back-analysis and calibration of the numerical model using data of instrumentation measurements, gathered during the dam construction. (2) Determine the optimized plan of the dam’s first impounding so that the dam safety is secured against hydraulic fracturing. (3) Predict the displacements of the dam in the future under seepage and consolidation using the calibrated numerical model. (4) Analyze the dam under seismic loading condition. The material properties were chosen through a two-step procedure based on numerical simulation of laboratory tests in the software and calibration between the stress–strain analysis of the dam and instrumentation measurements at the end of construction stage, so that the real behavior of the dam can be represented. To find the maximum rate of dam’s first impounding in safe condition, a sensitivity analysis was performed assuming eight number of impounding scenarios. Having performed the steady-state seepage analysis, seismic loading was applied using the equivalent linear method and the permanent displacements were predicted using the method of Newmark sliding blocks. Liquefaction analysis was also performed to recognize liquefiable zones of the foundation. Finally, stress redistribution analysis was carried out to estimate the post-earthquake displacements.

中文翻译：

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首次蓄水阶段的土石坝健康监测和动态分析：案例研究—伊朗的Siahoo大坝

土坝的首次蓄水被认为是这些地球结构在其使用寿命期间最关键的阶段之一，因此需要仔细监控水坝的安全性。在这项研究中，伊朗的Siahoo大坝（一个土石坝）的行为在第一次蓄水阶段通过数值建模进行了评估，该阶段包括（1）使用仪器测量数据对数值模型进行反向分析和校准大坝建设。（2）确定大坝首次蓄水的优化方案，以确保大坝安全免遭水力压裂。（3）使用标定的数值模型预测在渗流和固结作用下将来大坝的位移。（4）分析地震荷载作用下的大坝。通过在软件中对实验室测试进行数值模拟，并在大坝的应力-应变分析与施工阶段结束时的仪器测量之间进行校准，通过两步过程选择材料属性。可以代表。为了找到在安全条件下大坝首次蓄水的最大速率，在假设八个蓄水方案的情况下进行了敏感性分析。进行稳态渗流分析后，使用等效线性方法施加地震荷载，并使用Newmark滑块方法预测永久位移。还进行了液化分析以识别基础的可液化区域。最后，