基于E-B模型的面板堆石坝变形模拟

Deformation Simulation of Concrete Faced Rockfill Dam Based on E-B Model

混凝土面板是面板堆石坝最主要的防渗体,其变形和开裂状态对大坝的整体安全至关重要,在设计阶段需要对施工期及运行期面板的变形做充分预测。土石散粒体的本构模型种类繁多,采用非线性弹性模型中的邓肯E-B模型,结合商业有限元数值模拟软件,对陕西省某水库沥青混凝土面板堆石坝进行数值模拟,对比多年以来坝体和面板的渗漏和变形观测数据,发现模拟结果很好地与实际情况相吻合,表明在混凝土面板堆石坝的变形模拟中,邓肯E-B模型具有很高的工程实用水平。

The concrete panel is the most important anti-seepage part for rockfill dam,and the deformation and cracking of which is very important for dam safety,thus in the design stage the deformation of the concrete panel during construction and operation periods should be predicted. There are many different constitutive models for soil and rock material,and the Duncan E-B model,which is a nonlinear elastic model,is used in this paper to simulate an asphalt concrete face rockfill dam in Shaanxi province,combined with the business finite element numerical simulation software. The simulation results agree well with the observation data,demonstrating that the precision of Duncan E-B model is enough for the deformation simulation of actual concrete face rockfill dam.