Prediction of and early Warning for Deformation and Stress in the Xiaowan Arch Dam during the First Impounding Stage

Abstract:

A hybrid prediction model based on the simulation of the complete process in high arch dams is proposed because of capacity shortage in the prediction of and early warning for deformation and stress in such dams during the first impounding stage. An early warning system for dam body deformation as well as dam heel and dam toe stress is established in this model. The warning thresholds are also clarified. Applications in the first impounding stage of the Xiaowan Arch Dam show that the model is practical and effective, and can provide highly accurate predictions. Early warning indicator thresholds for deformation and stress are reasonably set to provide warnings for abnormal situations. The model provides accurate predictions and effective warning methods for the safe impounding and operation of high arch dams.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 2463-2472
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.2463
• Online since: September 2013
• Authors: Qiu Jing Zhou, Guo Xin Zhang, Yi Liu
• Keywords: Deformation, First Impounding Stage, High Arch Dam, Prediction and Early Warning, Stress

References

[1] Wu Z R.: Safety Monitoring Theory & Its Application of Hydraulic Structures. (Higher Education Press, Beijing 2003).

[2] He Xinwang, Ma Fuheng: Preliminary Study on the Framework of Dam Safety Early-warning System. Hydropower Automation and Dam Monitoring, Vol. 30 (2006), p.36.

[3] He Jinping, Cheng Li: Basic idea of research on pre-warning system and emergency plan for dam safety. Hydropower Automation and Dam Monitoring, Vol. 30 (2006), p.1.

[4] Lei P, Chang X L, Xiao F, et al: Study on early warning index of spatial deformation for high concrete dam. Sci China Tech Sci, Vol. 54 (2011), p.1607.

DOI: 10.1007/s11431-011-4373-5

[5] Ru Naihua, Jiang Zhongshen: Arch dams: Accident and Safety of Large Dams. (China Water Power Press, Beijing 1995).

[6] Lombardi, G.: Kölnbrein dam: An unusual solution for an unusual problem, Water Power & Dam Construction, 6, (1991), pp.31-34.

[7] Li Zan: Study on cracks at the heel of the arch dam of shimen project, Journal of Hydraulic Engineering, 11, (1999), pp.61-65.

[8] Shu Yong: Back analysis of displacement monitoring results during Ertan arch dam first impoundment, Design of Hydroelectric Power Station, 2, (2006), pp.34-41.