关键词: 高拱坝, 混凝土, 施工期, 温度监测, 自动化

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