中文摘要：

以溪洛渡特高拱坝为例,阐述现场布设分布式光纤系统,进而确定特高拱坝真实温度场的方法与流程.分析特高拱坝混凝土真实温度场研究的必要性与可行性,建议现场布设分布式光纤进行试验研究的有效途径.基于所提方法,在溪洛渡特高拱坝的施工现场布设分布式光纤,构建分布式光纤测温系统,并进行真实温度场的相关测试.实测成果表明分布式光纤测温系统能快捷、准确地监测大坝混凝土结构内部温度场的变化,为有效地评价大坝安全提供了可靠的科学依据.研究结果表明：采用在施工现场布设分布式光纤,并进行基于实时温度场的试验,可更为准确地确定特高拱坝的真实温度状况.

英文摘要：

This paper elaborates a process for determining the temperature field of super-high arch dam concrete by laying distributed optical-fiber system at the dam construction site,focusing on a new method for obtaining the true temperature field of super-high arch dam by a case study of Xiluodu arch dam.The necessity and feasibility of getting true temperature field of super-high arch dam are analyzed;the effective way of laying distributed optical-fiber at construction site,and experimental study on true temperature field are all suggested.Based on this method,practical laying of the distributed optical-fiber temperature monitoring system has been carried out for fully-graded hydraulic concrete at the construction site of Xiluodu arch dam.The measured results show that distributed optical fiber temperature measurement system can quickly and accurately monitor the variation of the temperature field within the dam concrete structure.These results have provided the reliable scientific basis for appraisal of safety and stability of the dam.The results show that the accuracy of true temperature conditions can be improved by the distributed optical-fiber temperature monitoring system of super-high arch dam.