厂顶挑流式水电站接缝问题研究

为探明厂顶挑流式水电站不同接缝处理方式对厂坝结构的影响,利用有限元法对厂坝接缝问题进行了仿真模拟和敏感性分析,探讨了不同接缝处理方式的利弊及填缝宽度对厂坝结构的影响。结果表明,全部连接对改善大坝受力状态更为有利,上分下连对厂房结构更为适合。对于上分下连的接缝方式,上部填缝宽度与大坝坝踵拉应力和顺河向位移呈正相关性关系,与厂房底板最大压应力和顺河向位移呈负相关性关系。研究结果可为工程设计提供参考依据。

Study on Joint Problems of Jet-flow Hydropower Station

In order to find out the influence of different joint treatment methods on the structure of Jet-flow type powerhouse and dam,the finite element method is used to simulate and analyze the sensitivity of the joint problem of jet-flow type powerhouse and dam.The advantages and disadvantages of different joint treatment methods and the influence of joint width on the structure are discussed.The results show that the"full connection"is more favorable for improving the stress state of the dam,and the"top-down connection"is more suitable for the powerhouse structure.The width of the upper joint is positively correlated with the tensile stress of the dam and the displacement along the river,and negatively with the maximum compressive stress of the powerhouse and the displacement along the river.The results can be used as reference for engineering design.