湿化及流变对不同软岩料利用范围面板坝应力变形的影响

为研究不同软岩料分区范围下湿化及流变特性对面板堆石坝的应力及变形影响。查找、对比软岩料的湿化及流变模型,分析和研究已有的软岩料湿化及流变特性的有限元实现方法。以某面板堆石坝为例,按软岩料的不同填筑范围制定两种计算方案,分别进行大坝的三维有限元应力变形计算,然后通过对比分析两种计算方案的计算结果,系统总结软岩料不同填筑范围对面板堆石坝应力变形的影响规律。结果表明:随着软岩料利用范围的扩大,坝体的流变范围也随之扩大,相应的垂直位移、水平位移位移及面板的挠度也随之增大。因此,在实际面板砂砾石坝工程设计中,进行软岩料的扩大利用时需要合理的制定软岩料填筑范围。

Influence of wetting and rheology on stress and deformation of concrete face rockfill dam in utilization scope of different soft materials

In order to study the influence of wetting and rheological characteristics under the scope of different soft rock materials on stress and deformation of concrete face rockfill dam,the paper searched and compared the wetting and rheological model of soft rock material, studied the realization way of finite element method of wetting and rheological property of existing soft rock materials.Taking a concrete face rockfill dam as an example,the paper made two calculation schemes according to different clinical filling range of soft rock material, and carried out the stress and deformation calculation by using three-dimensional nonlinear finite element method respectively.Then it compared the results of two calculation programs and systematically summarized the effect of different soft material partition on the stress and deformation of concrete face rockfill dam.The result show that with the enlargement of the scope of soft rock material utilization,the rheological range dam body expands, the corresponding vertical and horizontal displacement of dam body,and the deflection of pane will increase. Therefore, it is necessary to rationally formulate the utilization scope of soft rock material in engineering design.