Temperature analysis of concrete gravity dam of Qianming Reservoir in China during construction

DOI

10.2991/978-94-6463-312-2_7How to use a DOI?

Keywords

Construction period; Ravity dam; Ncrete; Tmperature

Abstract

In order to study the temperature process of concrete gravity dam in Qianming Reservoir during construction, temporary temperature monitoring was carried out. The reliability of the temperature monitoring data obtained by the dam permanent temperature monitoring system, such as the temperature during the construction period, the concrete temperature record of the construction unit and the local temperature history record, is demonstrated and some basic understandings are obtained. At the same time, according to the monitoring data analysis, put forward some concrete crack prevention measures. The main conclusions are as follows: (1) Temperature after embedding and maximum temperature of dam section 7# and 14# are higher than those of 8# and 11#, but the temperature rise of 8# and 11# is higher than that of 7# and 14#, The temperature difference in dam section 7# and 14# is the largest, while the temperature difference between dam section 8# and 11# is small. (2) After concrete pouring, the temperature of the dam body rises sharply. Most of the dam sections reach the highest level about 60 hours after pouring, and the highest temperature rise is about 30℃. The internal temperature of concrete is controlled within 45℃. During the heating stage, there is no significant difference between the upstream and downstream panels of the dam and the internal temperature of the dam. In the cooling stage, the relationship between the temperature of different parts at the same time point is that the internal temperature is higher than that of the upstream and downstream panels. The results can provide reference for gravity dam placement engineering in temperate areas.

Copyright

© 2023 The Author(s)

Open Access

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TY  - CONF
AU  - Shenghui Chen
AU  - Leilei Xue
AU  - Xiaochen Xu
PY  - 2023
DA  - 2023/12/07
TI  - Temperature analysis of concrete gravity dam of Qianming Reservoir in China during construction
BT  - Proceedings of the 2023 5th International Conference on Structural Seismic and Civil Engineering Research (ICSSCER 2023)
PB  - Atlantis Press
SP  - 47
EP  - 53
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-312-2_7
DO  - 10.2991/978-94-6463-312-2_7
ID  - Chen2023
ER  -