摘要
三峡工程二期围堰塑性混凝土防渗墙的应力变形是衡量围堰安危的重要指标。由于该围堰的运用期为 5年 ,根据试验确定的塑性混凝土不同龄期的 Duncan- Chang E-μ模型参数 ,按照实际施工程序 ,考虑时空变化的影响 ,对二期围堰进行了应力变形三维有限元计算 ,分析了大规模抽水期和运行期围堰防渗墙应力特征和变形情况 ,同时将计算结果与实测结果及反馈分析结果进行比较。计算分析表明围堰堰体和防渗墙体是安全的。
The stress and deformation of the phase Ⅱ cofferdam of the Three Gorges Project, especially those of the cutoff walls, are the key safety indexes of the cofferdam. This paper studies the stress and deformation of the cofferdam during periods of large scale pumping and running using 3 D finite element method (FEM) analysis according to the actual construction process and the Duncan Chang E μ model parameters for different ages of plastic concrete. The calculated results are compared with observed information and it is demonstrated that the cofferdam is and will be safe. The results also provide valuable suggestions for the safe running of the cofferdam.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第4期240-243,共4页
Journal of Tsinghua University(Science and Technology)
