特高拱坝体形适应性分析研究

发布时间：2018-04-06 03:32

本文选题：水利工程　切入点：特高拱坝　出处：《水利水电技术》2017年10期

【摘要】：以西北地区某240 m特高拱坝为例,采用拱梁分载法,选择对拱坝体形设计影响较大且具有一定不确定性的参数,即地基综合变形模量、坝体混凝土弹性模量和线膨胀系数等进行敏感性分析,研究拱坝体形设计的合理性和适应性。经体形优化设计调整,对得到的拱坝体形进行关键参数的敏感性分析计算。由计算成果可知,当地基综合变形模量、坝体混凝土弹性模量和线膨胀系数在一定范围内浮动时,坝体应力、位移均满足设计要求,说明拱坝体形适应性较好。此研究方法将影响拱坝设计的不确定因素提前考虑,既可以减轻后续设计阶段体形优化调整的工作量,又可以保证拱坝建成后保持良好的工作状态,对类似工程设计具有重要的参考意义。
[Abstract]:Taking a 240m super high arch dam in northwest China as an example, the composite deformation modulus of the foundation is chosen, which has a great influence on the arch dam shape design and has certain uncertainty by using the method of arch beam load separation.The sensitivity analysis of elastic modulus and linear expansion coefficient of dam concrete is carried out to study the rationality and adaptability of arch dam shape design.The sensitivity of the key parameters of the arch dam is analyzed and calculated by adjusting the shape optimization design.The calculation results show that when the composite deformation modulus of foundation, elastic modulus of concrete and coefficient of linear expansion of dam body fluctuate within a certain range, the stress and displacement of dam body can meet the design requirements, which indicates that the arch dam has better adaptability to shape.This research method will affect the uncertain factors of arch dam design in advance, which can not only reduce the workload of body shape optimization adjustment in the subsequent design stage, but also ensure that the arch dam will maintain a good working state after completion.It has important reference significance for similar engineering design.
【作者单位】：中水北方勘测设计研究有限责任公司;
【分类号】：TV642.4

【相似文献】