Abstract: The traditional method of temperature monitoring for arch dam concrete construction is setting permanent thermometer in the typical dam section on typical and representative elevation, while for other dam section and block, temperature is obtained by measurement of the water in cooling water pipe. By this way, the error is too big and data are too few to provide timely and accurate data for accurate and effective temperature control. As the highest dam worldwide, Jinping I concrete hyperbolic arch dam is of 305 m and the concrete temperature control and crack prevention is a key problem for quality control. For the first time in arch dam construction history, thermometers are buried in all pouring blocks. For each block, 2~9 thermometers are buried and 3 976 thermometers are buried in total. The monitoring workload and the amount of data is extremely great, as well, manual monitoring is difficult. Research on automatic temperature monitoring system is carried out. By comparison between temperature acquisition from pouring surface and from gallery, the latter one is adopted. The cable access the automatic acquisition unit by gallery and the optical fiber communication or wireless communication is used. Automatic temperature monitoring of arch dam concrete construction is realized. After integration of temperature control information, automatic temperature control is realized, too.

Key words: high arch dam, concrete, construction period, temperature monitoring, automation

摘要： 拱坝混凝土施工期温度监测的传统方法是在典型坝段典型代表性高程布置永久温度计，其他坝段和坝块靠对冷却水管闷温后测量水温判断混凝土施工期的内部温度，温度监测误差大，数据少，难以为精细有效温控工作提供及时准确的混凝土温度数据，稍有不慎，极易产生温度裂缝。锦屏一级水电站混凝土双曲拱坝坝高305 m，是世界第一高坝，拱坝混凝土温控防裂是拱坝质量控制的关键技术问题。为此，拱坝建坝史上首次在锦屏一级拱坝全部浇筑仓块埋设温度计进行全过程温度监测，每个浇筑仓块埋设了2~9支不等的温度计，全坝共埋设温度计3 976支，温度监测工作量和数据量极为浩大，人工监测和监控难度极大。锦屏建设管理局牵头开展了高拱坝混凝土施工期温度自动化监控系统研究，经过仓面自动化采集方案与试验、坝体廊道自动化采集方案的研究比较，选用坝体廊道布置自动化采集单元方案；温度计电缆经向上牵引和向下预埋布设至坝体廊道后接入自动采集单元，采用光纤通信或无线通信，成功实现了拱坝混凝土施工期温度监测自动化，温度监测数据导入锦屏一级拱坝混凝土施工期温控信息集成系统后实现了各仓块温度自动监控管理。

关键词: 高拱坝, 混凝土, 施工期, 温度监测, 自动化