| ROCK-FILLED CONCRETE |
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Simulation of the working behavior of Shibahe reservoir rock-filled concrete gravity dam during construction |
| CHENG Heng1, ZHOU Qiujing1, LOU Shijian3, ZHANG Guoxin1,2, LIU Yi1,2, LEI Zhengqi1 |
1. China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
2. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing 100038, China;
3. Zunyi Survey and Design Institute of Water Conservancy and Hydropower Co. Ltd., Zunyi 563002, China |
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Abstract Key thermal parameters of self-compacting, rock-filled, and normal concrete of the rock-filled concrete gravity dam of Shibahe Reservoir in Renhuai City, Guizhou Province, are inverted based on its design data and temperature-monitoring data. On this basis, the finite element simulation method is used to simulate the working behavior during the construction of the dam, including the dam pouring, concrete hardening, and meteorological change processes. Next, the distribution and evolution law of the temperature field and stress field of the dam are analyzed to evaluate the overall safety of the dam. The results show that the temperature process of the dam body obtained by simulation inversion can truly reflect the temperature variation of the dam body. The maximum temperature in the dam body is typically reached within 3—5 d, and the temperature rise of hydration heat is between 4—7 ℃. The maximum temperature of pouring concrete in summer is about 35.0—39.5 ℃, while that in winter is about 25—28 ℃. Although the partial tensile stress on the spillway section surface is large in the low-temperature season, the stress in other parts does not exceed the concrete strength, and the dam safety can be guaranteed. The result indicates that pouring concrete on the large warehouse surface of the rock-filled concrete gravity dam is feasible.
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| Keywords
rock-filled concrete
gravity dam
construction period
simulation
working behavior
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Issue Date: 18 August 2022
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2022,
Vol. 62
