【摘要】 以某航电枢纽工程为例,在施工导流期,发电厂房侧开挖至底板建基面,泄洪闸侧导流过水,形成厂坝导墙高达49.00 m悬臂下单侧受力的不利工况。建立了三维有限元模型,对施工期及运行期不同工况开展了应力应变及稳定性数值模拟计算分析。研究表明,厂坝导墙在单侧挡水的"施工期"工况下的应力和位移响应远大于双侧挡水的"运行期"工况,表明厂坝导墙在"运行期"工况下位移应力指标均满足设计要求;厂坝导墙在"施工期"工况下出现较大拉应力,应对该拉应力区进行局部加强配筋;导墙及消力池底板上竖向应力均小于0,处在压实状态,无倾覆危险。"施工期"工况导墙整体抗滑安全系数约5.98,抗滑安全性好,满足设计要求。更多还原

【Abstract】 A hydropower station was taken as an example, during the construction diversion period the power plant house is excavated to the bottom of the floor, and the water flow passes through the dam, forming an unfavorable condition that the maximum cantilever of the dam guide wall with single side force is 49.00 m. A three-dimensional finite element model was established to analyze the stress, strain and stability of the guide wall under the construction period and operational period conditions. The research shows that the stress and displacement response of the dam guide wall under the construction period condition of single-side water retaining is much greater than the running period condition of the double-side retaining water. It shows that the displacement and stress indexes of the guide wall meet the design requirements, and the plant dam guide wall has a large tensile stress under the construction period condition, and local reinforcement should be carried out in the tensile stress area. The normal stress on the base plate of the dam guide wall is less than 0, in another word, in a compacted state, no risk of overturning. The overall anti-slip safety factor of guide wall in construction period condition is about 5.98, which satisfies the design requirements.更多还原