地震作用下坝后式水电站厂坝连接形式对比研究

发布时间：2018-09-10 19:07

【摘要】：为应对近几年西南地区坝后式水电站建设遇到的复杂坝址条件和强震给厂房稳定性带来的影响,以厂坝连接形式优化比选为目标,采用有限元法建立了金沙江中段某坝后式水电站的三维有限元模型。在校核洪水位工况和地震工况下对比了平缝相靠、整体连接和平缝灌浆三种不同的厂坝连接方案给过缝钢管及厂房结构受力特性带来的影响。结果表明:厂坝整体连接和平缝灌浆方案下过缝钢管和厂房上下游墙的应力和变形要明显小于平缝相靠方案,其中校核洪水位工况下整体连接方案钢管的最大轴向和环向应力分别只有平缝相靠方案的19%和17%,地震工况下厂房的变位也在承受范围内,且其更利于厂房和坝体通过联合作用达到钢管的均匀受力,因此推荐为采用的厂坝连接形式。
[Abstract]:In order to cope with the influence of complex dam site conditions and strong earthquakes on the stability of powerhouse in the construction of dam rear type hydropower station in southwest China in recent years, the optimization ratio of the form of connection between plant and dam is chosen as the target. A three-dimensional finite element model of a dam rear type hydropower station in the middle part of Jinsha River is established by using finite element method. Under the condition of nuclear flood water level in school and earthquake condition, the effects of three different connection schemes on the mechanical characteristics of steel pipe and powerhouse structure are compared, such as horizontal joint support, integral connection and joint grouting. The results show that the stress and deformation of jointed steel pipe and upstream and downstream wall of factory building are obviously smaller than those of plain jointing method under the whole jointing and joint grouting scheme of plant and dam. The maximum axial stress and circumferential stress of the steel pipe under the flood level check scheme are only 19% and 17% of that of the plain joint scheme, respectively, and the displacement of the factory building is also within the bearing range under the earthquake condition. And it is more favorable to the uniform force of steel pipe through the joint action of powerhouse and dam body, so it is recommended as the connection form of plant and dam.
【作者单位】：合肥工业大学土木与水利工程学院;大连理工大学建设工程学部工程抗震研究所;
【基金】：国家自然科学基金(51409074) 中国博士后科学基金(2014M550341) 中央高校基本科研业务费专项资金资助(JZ2014HGQC0118,2013HGBH0052) 合肥工业大学博士学位专项资助基金(JZ2014HGBZ0022)
【分类号】：TV314

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