摘要
光纤测温是利用分布式光纤对混凝土内部温度进行高密度(时间上、空间上)、无污染(人为的、干扰的)的全自动化监测过程。为了反演出混凝土的导温系数,在某建设中的特高拱坝河床坝段典型浇筑仓,距离表面0.6m范围内,布置分布式光纤进行混凝土温度监测。由于浇筑仓混凝土的施工质量存在一定随机性,根据埋设在距离混凝土表面不同深度处的分布式光纤,对各深度处光纤测温数据取平均值后进行反演。实践表明,采用分布式光纤测温所反演的导温系数是可行和可靠的。
Fiber distributed temperature monitoring is realized by carrying on high density (temporal and spatial) and pollution-free (factitious and interfered) monitoring automatically on the temperature of inner concrete. In order to determine the thermal diffusivi- ty of mass concrete, based on the record of distributed fiber buried in the O. 6 meter distance from the surface of concrete of a certain ultra-high building dam. Due to the randomicity of construction quality in the concrete, this paper adopts the average value of distrib- uted fiber's temperature at the different distance from the surface of concrete. The result shows that thermal diffusivity based on the record of fiber distributed is feasible and reliable.
出处
《中国农村水利水电》
北大核心
2012年第3期91-93,共3页
China Rural Water and Hydropower
基金
国家自然科学基金(51079079)
三峡大学基金(KJ2010B003)
关键词
光纤测温
导温系数
反演分析
大体积混凝土
fiber temperature monitoring
thermal diffusivity
inverse analysis
mass concrete