水电站放空洞混凝土和钢管联合封堵系统设计

发布时间：2018-03-18 13:26

  本文选题：封堵系统　切入点：进人孔　出处：《人民长江》2016年17期 　论文类型：期刊论文

【摘要】：某水电站水库库底放空洞因进水口检修闸门长期挡水及无法紧急下闸,需进行后期改建。从减少经济投入考虑,改建采用由混凝土封堵体、预埋钢管、钢制封头和进人孔构成的联合封堵结构,其中混凝土封堵体、预埋钢管、钢制封头的承压受力结构较为明确,可分别进行计算。钢制封头上设进人孔会使封头开孔处产生显著的局部应力成为结构的薄弱点,需采用三维有限元分析计算。详细论述了放空洞封堵系统各部位的设计,其方法可为类似工程封堵设计提供参考。
[Abstract]:The bottom cavern of a reservoir of a hydropower station needs to be rebuilt in the later stage because of the long term water retaining of the gate for water inlet maintenance and the inability to urgently lower the gate. In view of reducing the economic input, the reconstruction adopts concrete plugging body and pre-buried steel pipe. The combined sealing structure composed of steel head and manhole, in which concrete sealing body, embedded steel pipe and steel head bearing force structure are relatively clear. It can be calculated separately. The obvious local stress at the opening of the head will become the weak point of the structure. The design of every part of the sealing system is discussed in detail, which is based on the three-dimensional finite element analysis. The method can provide a reference for similar engineering plugging design.
【作者单位】： 中国电建集团华东勘测设计研究院有限公司;
【分类号】：TV73
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本文编号：1629770