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针对某坝后式水电站厂坝连接问题,建立了包括厂坝、基岩及其软弱结构带在内的整体有限元模型,并在分缝处设置以接触力为未知量的接触单元,采用有限元混合法研究了在自重、水压力、地震作用及泄洪振动下,不同厂坝连接型式下厂房受力变形特征、厂坝整体抗滑稳定性及厂房泄洪振动响应特性。结果表明,厂坝平缝连接既能有效改善厂房的静动力响应状态(应力、位移、加速度等),又能提高厂房结构、机组正常稳定运行及厂坝整体抗滑稳定安全系数,具有一定的合理性和工程实际意义。
In order to solve the problem of connection between dam and dam of a post-dam hydropower station, a whole finite element model including factory dam, bedrock and its weak structure belt is established. The contact unit whose contact force is unknown is set at the joint, Yuan hybrid method was used to study the mechanical deformation characteristics of the powerhouse with different plant and dam connections, the overall anti-slide stability of the dam and the response characteristics of the plant spillway under self-weight, water pressure, earthquake action and flood discharge vibration. The results show that the connection between factory dam and flat seam can not only effectively improve the static and dynamic response (stress, displacement and acceleration) of the plant, but also improve the plant structure, normal and stable operation of the plant and safety factor of anti-slide stability of the plant dam. Rationality and practical significance of the project.