受周围环境影响的渠道衬砌板胀缩研究  

Mechanism of Channel Lining Plate Swell-Shrink Affected by the Surrounding Environment

作　　者：李洋[1] 娄宗科[1] 张文郁[2] 高兰兰[1] 高笑[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]中国长江三峡集团公司枢纽管理局,湖北宜昌443133

出　　处：《灌溉排水学报》2013年第6期137-140,共4页Journal of Irrigation and Drainage

基　　金："十二五"农村领域国家科技计划项目(2011BAD25B04);"十二五"科技支撑计划课题(2012BAD08B01)

摘　　要：为弥补经验公式计算混凝土收缩量的不足,以预制衬砌板为研究对象,基于热传导方程和扩散方程,结合预制渠道板实际相应的第三类边值条件,分别推导出渠道形变受环境温度和湿度影响的具体公式,定量分析混凝土收缩量。结果表明,渠道的应力应变值随着环境温度、湿度差值的增大而增大,环境影响下渠道板总收缩量为温度和湿度影响下产生的冷缩和干缩量之和。In order to make up the insufficiency of concrete shrinkage estimated by empirical formula, the mechanism of channel lining plate swell-shrink was studied. With precast lining plate as the object , based on the heat conduction equations and diffusion equations, combining with channels corresponding boundary conditions, the specific channels deformed formulae affected by the ambient temperature and humidity were deduced respectively. Concrete shrinkage was analyzed quantitatively according to the deformed formulae, and the mechanism of expansion and contraction affected by environment was gained. The results showed that stress-strain value increased with the increase of the differences of environmental temperature and hu- midity. Total shrinkage was the sum of cold and dry shrankage caused by the temperature and humidity.

关 键 词：环境温度 温度场 湿度场 热传导 

分 类 号：TV49[水利工程—水工结构工程]