面板堆石坝填筑仿真及堆石料参数影响研究

Study on simulation of filling construction and impact from parameter of rockfill material for concrete face rockfill dam

本文以堆石体变位来评价仿真计算模型是否满足工程借鉴要求,进一步减小有限元的计算结果与实际观测值之间目前存在的较大差距。根据百米级面板堆石坝应力变形的特点,结合坝体变形原型观测数据,对数值分析中坝体分区填筑的碾压分层问题进行探讨,解决了坝体分期施工中网格简化的问题,提出了仿真分析中面板堆石坝坝体的有效分层厚度与坝高的比例,极大地提高了计算效率,有效地预测了面板堆石坝坝体的变形。同时通过研究面板堆石坝堆石填筑参数对坝体变形的影响,得到堆石材料参数的影响范围,为面板坝设计、试验研究提供依据。

The assessment on whether the simulation model can satisfy the reference for the construction requirement is made with the deformation of rockfill body, and then the larger existing disparity between both the finite element calculation result and the actual observed values is further decreased. Based on the stress and deformation characteristics of the concrete face rockfill dams with the heights over 100 meters, the layered filling of the dam body zoned filling in the numerical analysis is deeply discussed combined with the observed prototype data of dam deformation; with which the problem from mesh simplification of the stage construction of dam is solved and the effective proportion between the layering thickness and the dam height for the body of concrete face rockfill dam in the simulation analysis concerned is also presented with great enhancement of calculation efficiency and effective prediction of the deformation of the dam body. Simultaneously, the impact from parameter of rockfill material is obtained through the study made on the impact from the dam body deformation on the rockfilling parameter for the dam, that lays the basis for the design and the experimental study of the dam as well.