Research on Concrete Temperature Control and Crack Prevention for Pumping Station Complicated Structure

Abstract:

The water passageway structure of pumping station is both mass concrete structure and complicated structure. Cracks always appear in these areas during construction period. It will shorten the building life, and endanger the safety of pumping station. Three dimensional finite element method is adopted to simulate the temperature field and stress field of pump station in construction. The considering loads include gravity, temperature, autogenous volume deformation, and creep. The temperature and the first principle stress duration curves of easily cracking area are analyzed in different cases. After optimization of different temperature control measure, the tensile stress of different areas in early age or later age can be controlled lower than tension strength, and the cracking prevention safety factor can be raised. It is found that pipe cooling, surface insulation, pouring intermission, structure constrains can change the tensile stress obviously for pumping station. The influence of these factors is separately concluded.

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 1907-1910
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.1907
• Online since: May 2012
• Authors: Yang Zhang, Sheng Qiang, Wei Feng Pan, Jing Qiu Dai
• Keywords: Finite Element Method (FEM), Pumping Station, Temperature Control and Crack Prevention, Water Passageway

References

[1] B F Zhu. Thermal Stresses and Temperature Control of Mass Concrete. (China Electric Power Press, Beijing 1999)

[2] J. He, A. Hoyano. Building and Environment. Vol. 45 (2010), p.461

[3] S. Qiang, S. K. Chen, L. Guo, Z. Q. Xie. The 2nd International Conference on Information Engineering and Computer Science Proceedings, Wuhan China.(2010)

[4] Y M Zhu, Z Q Xu, J R He. Journal of Yangtze River Scientific Research Institute. Vol. 20 (2003), p.19