Analysis of wind field distribution and crack control measures of concrete dam corridor structure in high cold area
The high wind velocity field inside the corridor is one of the reasons for the crack.Controlling corridor cracking during dam construction and operation is crucial in reducing the risk of cracking.[Objective]To conduct a wind field analysis of the during the concrete dam design and construction phase to prevent corridor cracks,[Methods]taking a concrete gravity dam in the northwest region of China as an example,a three-dimensional computational fluid dynamics method is used,based on the three fundamental control equations of CFD,to study the mechanism of corridor cracking from environmental factors,and to statistically analyze the wind speeds at various nodes inside the corridor through numerical simulation.[Results]The results show that the average wind speed inside the corridor is 4.72 m/s.Cracks where the wind speed is lower than the average wind speed account for 27.2％,while cracks with wind speeds higher than the average constitute 72.8％,indicating higher wind speeds at crack lo-cations.[Conclusion]The results show that if the entrance of the corridor is not closed,the wind will spread inside the corridor and reach the limit speed at the intersection or corner of the corridor,and the existence of the wind field will accelerate the sur-face humidity loss of the corridor,and then lead to the corridor cracks.According to the crack formation mechanism,the crack prevention measures during the construction of the dam corridor are proposed,and the design process,construction method and management measures are proposed.A set of engineering procedures for the crack prevention and control of the dam corridor is established to provide engineering experience and scientific basis for the subsequent construction of the concrete gravity dam.
万方数据
维普
