高寒地区碾压混凝土坝缺口度汛温度场仿真分析

针对高寒地区库水温度较低、温差较大的实际情况,根据碾压混凝土重力坝设计和施工组织安排,采用三维有限元浮动网格法对坝体缺口度汛的温度场进行仿真计算。计算结果表明:度汛对坝体表面影响较大,对坝体内部影响较小,应采取相应措施对坝体表面加强保护以防止产生大量的裂缝;冬季坝体内外温差较大,容易出现裂缝,需要严格的温度控制措施。

Simulation Analysis of Thermal Field for the Breach Flow of RCC Dam in High-Cold Area

According to the conditions of the design and construction plan of the RCC gravity dam,three-dimensional finite element relocating mesh method is used to carry out the simulation of the temperature field of the dam of the breach flow in the cold area where there are low temperature and big temperature differences in reservoirs.The calculated results indicate: the safety in the flood season may have the great effect upon the surface of dam body,but small effect upon the inner part of dam body.Accordingly,the corresponding measures should be adopted to protect the dam body surface so as to prevent the occurence of more cracks.In winter,there is the great temperature difference in dam body so that cracks are easy to occur.As a result,the strict temperature control measures are necessary.