考虑淤沙影响的高拱坝水库水温数值分析及应用

高拱坝的水库水温分布对坝体的稳定温度场和封拱温度有重要影响，研究水库水温的分布规律对于拱坝温度荷载的确定和坝体设计有着重要的意义。本文考虑高拱坝水库淤沙的影响，采用热流耦合方法对水库立面二维水温数学模型进行了数值分析，对高拱坝水库水温的分布规律做了一定的探讨，在此基础之上分析了水库水温分层的形成过程及原因，并重点探讨了淤沙对高拱坝水库水温以及运行期应力的影响，对比分析了水温的规范算法、实测值、本文数值计算方法之间的差别，并对规范的水库水温计算方法进行了评价。

Numerical Analysis and Application on Water Temperature of Reservoir for High Arch Dam considering the Effects of Sedimentation

For the calculation of steady and quasi-steady temperature field, it is necessary to determine the temperature distribution along the surface of a dam. In this perspective, it matters great importance to research on the temperature distribution law of water reservoir for temperature load and dam design. A 2-D numerical model is built for the temperature calculation of reservoir considering sedimentation. On this basis, the distribution law of water reservoir, the formation and development of temperature layer is analyzed. The influence on the stress field of high arch dam during operation period which is caused by the sedimentation is discussed. The difference between the methods of the design criterion, the actual measurement and the numerical calculation is compared consequently. Finally, the calculation method for the temperature of water reservoir is evaluated according to the comparison results.