覆盖层上高面板坝连接板长度优化分析

建在深厚覆盖层上的高面板坝坝基防渗设施常采用混凝土防渗墙，坝体与覆盖层和趾板与防渗墙是质量与刚度相差很大的结构物，施工时和蓄水时各自的变形相差很大，为了协调各结构物的变形，建议用连接板将坝体、面板、趾板与防渗墙连接起来，以改善防渗墙和趾板的应力状态。用有限元法数值分析对连接板长度进行优化分析，应用于实际工程。

Optimization analysis on length of connection slab for high concrete faced rockfill dam on deep alluvium deposit

A diaphragm wall is usually used to prevent the seepage through the alluvium deposit for a high concrete face rockfill dam built on a deep alluvium deposit. The mass and stiffness of the dam body and the alluvium deposit are differ much from that of the plinth and the diaphragm wall, so that the deformations of these two kind of structures are differ much from each other. In order to coordinate the differential deformation of these two kind of structures, setting a connection slab between the plinth and the diaphragm wall is suggested herein, and then the length of connection slab is optimized by the calculation by the finite element method as well. It would improve the stress-strain behaviors of both the diaphragm wall and the plinth. The connection slab with the optimized length has been adopted in a CFRD project.