THE INFLUENCE ON THE SAFETY AND REIABILITY OF THREE GORGES PROJECT CAUSED BY THE CORROSION DAMAGE OF PRESSURE PIPELINES
Pressure pipeline is an important part of the hydroelectric station. The corrosion on penstock will influence the safety and durability of hydroelectric station. Based on the prediction and analysis of damage pressure on corroded steel lined reinforced concrete pressure penstock situated in three gorges dam, the safety of corroded pressure pipelines is assessed in this paper. At first, the factors which have effect on the corrosion of pressure pipelines are analyzed and a calculation model is developed. According to the model, failure pressure of corroded pressure pipelines is calculated. The topic about how corrosion depth, length, width and shape influence the safety of pressure pipelines is also discussed. Secondly, statistical properties of random variables within performance function of pressure pipelines used in three gorges dam are presented and the corrosion reliability analysis model is obtained. The prediction method of residual service life of corroded pressure pipelines is presented. In the end, cording to above analyses and calculations, it is concluded that corrosion depth plays a crucial role on the safety of penstocks and the residual service life of pressure penstocks greatly depends on the age, corrosion length and corrosion depth.
three gorges project penstock corrosion safety reliability
Yun-Kun Huang Er-Yu Zhu Cai-Ran Zhang
School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, P.R. China
国际会议
长沙
英文
122-127
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）