长江科学院院报2011，Vol.28Issue(2)：50-55,6.
大型水电工程导流洞封堵体稳定性分析
Analysis on Stability of Diversion Tunnel Plug of Large-scale Hydropower Engineering
摘要
Abstract
The stability of diversion tunnel plug is very important for power generation and safe operation of hydropower station. Based on the summary and comparison of design and calculation methods for diversion tunnel plug at home and abroad, we carry out calculating analysis on the deformation, stress and stability of diversion tunnel plug under designed water level by 3-D numerical simulation analysis. Then, the progressive failure of plug from the parts to the whole is analyzed by over-loading safety factor method. The results show that the maximum displacement of plug is 1.1 ～ 1.4 mm and the shear strain on contact face is smaller with little extending range and failure under designed water level. According to the findings of over-loading safety factor method, the safety load factor that the plug can bear is 3.5 ～ 5.5 times of design water head, which can meet the standard requirements in safety and stability. And it is more reasonable and effective to adopt over-loading safety factor method to analyze the ultimate bearing capacity of diversion tunnel plug.关键词
导流洞/堵头/设计方法/三维数值计算/渐进失稳/超载安全系数法Key words
diversion tunnel/ plug/ design method/ 3-D numerical simulation/ progressive failure/ over-loading safety factor method分类
建筑与水利引用本文复制引用
董志宏,丁秀丽,叶三元,吴勇进,付敬..大型水电工程导流洞封堵体稳定性分析[J].长江科学院院报,2011,28(2):50-55,6.基金项目
水利部公益性行业科研专项(201001009) （201001009）
"十一五"国家科技支撑计划(2008BAB29B01) （2008BAB29B01）
国家自然科学基金重点资助项目(50639090) （50639090）
