三峡工程右岸地下厂房引水洞衬砌混凝土轴向裂缝成因分析

Causes of Axes Cracks in Right-bank of Three Gorges Hydropower Station

利用三维有限元的温度场仿真和二维有限元的徐变应力场仿真分析方法,探讨了三峡工程右岸地下引水洞衬砌在腰部附近及底部产生顺水流向规律性很强的轴向裂缝的原因.对各种可能的原因进行了敏感性分析,认为本工程衬砌裂缝的产生主要是环境温度变化引起,其中温度骤降的影响最大.

Discussion of the causes of downstream and disciplinary axes cracks which locate in haunch and bottom lining of the underground tunnel of right-bank of the Three Gorges is presented with 3D finite element about the emulation analysis of temperature fields and 2D finite element about the emulation analysis of creeping stress fields.Sensitive analysis about all kinds of possible causes is displayed and the rational conclusions are obtained.