摘要
以丰满重建工程碾压混凝土坝为研究对象,基于分布式光纤测量得到的温度监测数据,对严寒地区碾压混凝土坝越冬长间歇施工条件下越冬保温后、寒潮期间、极大昼夜温差下三个方面的越冬结合面内外温差规律进行研究。研究结果表明:严寒地区实现了在-30℃条件下大规模埋设分布式光纤测温的可能;越冬结合面表面温度变化较为稳定且缓慢下降,经越冬保温后其内外温差大大减小,而寒潮期间和极大昼夜温差下的内外温差均增幅不大,可见保温效果较好。研究成果可为类似工程提供参考和借鉴。
In this paper,RCC dams of fengman reconstruction project is studiedbased on the obtained temperature moni-toring data in severe cold region by distributed optical fiber measurement,the internal and external temperature difference of the overwintering joint surface is studied under the condition of RCC dams long intermission of overwintering layer in the severe cold region after overwintering insulation,during the cold wave and the extreme daily temperature difference.The result shows that the possibility of large-scale distributed optical fiber measurement is realized in the cold region un-der the condition of-30°C;The surface temperature change of overwintering joint surface is stable which decreased slowly,the internal and external temperature difference is greatly reduced after overwintering insulation,while it is not very large between the cold wave and the extreme day and night temperature difference,so it proves that the heat preser-vation effect in this project is better.
作者
陈波
孟宪磊
李洋波
CHEN Bo;MENG Xianlei;LI Yangbo(College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443000, China;HeBei FengNing Pumped Storage Co., Ltd., Fengning, Hebei 068350, China)
出处
《水利与建筑工程学报》
2018年第1期85-90,共6页
Journal of Water Resources and Architectural Engineering
关键词
严寒地区
光纤埋设
越冬结合面
内外温差
severe cold region
optical fiber buried
overwintering joint surface
internal and external temperature difference
