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利用堆石坝对地形条件适应性强的优势,将混凝土面板堆石坝设计建于条形山脊上,依天然坡面分别贴岩坡填筑堆石料,使原山体成为坝体一部分而形成的混凝土面板堆石坝,称之为贴坡型混凝土面板堆石坝。利用目前应用较为广泛的邓肯E-B模型,基于ABAQUS提供的2次开发用户子程序,对某贴坡型混凝土面板堆石坝施工填筑期和水库蓄水运行期的应力与变形进行模拟分析。计算结果表明,受地形和岩坡开挖形态的影响,贴坡型混凝土面板堆石坝的坝体变形规律与常规混凝土面板堆石坝有较大的不同,坝体沉降、水平位移以及面板的变形都较小;阶梯状的建基面凸角处有明显的应力集中,相应部位的应力水平较高。计算成果可为优化设计提供合理的建议和有效的措施。
Using the advantage of strong adaptability of topography to rockfill dam, the concrete faced rockfill dam is designed to be built on the ridge of bar, and the rockfill material is affixed to the rock slope according to the natural slope, so that the original mountain body is formed as a part of the dam body Concrete face rockfill dam, called the slope type concrete face rockfill dam. Based on the Duncan E-B model, which is widely used at present, this paper simulates the stress and deformation of a slope-type concrete faced rockfill dam during construction filling and reservoir impoundment operation based on the secondary development subroutine provided by ABAQUS. The calculation results show that the deformation of the dam body of concrete faced rockfill dam is different from the conventional concrete faced rockfill dam due to the influence of topography and rock slope excavation morphology. The settlement, horizontal displacement of the dam body, Deformation is small; ladder-like convex corners of the building have obvious stress concentration, the corresponding part of the higher stress levels. The calculation results can provide reasonable suggestions and effective measures for the optimization design.