| 摘要: |
| 【目的】研究高面板堆石坝面板与坝体的分期施工高差对于面板脱空变形的影响。【方法】在分析面板脱空机理的基础上，运用三维有限元子模型法，考虑堆石体的流变变形，以国内某高面板堆石坝工程为例，对不同面板与坝体分期施工高差方案所产生的面板脱空变形特征进行分析。【结果】面板与坝体的分期施工高差对各期面板的脱空变形影响显著，分期施工高差越大，各期面板的脱空变形相应越小；对于200 m级的高面板堆石坝，为有效避免面板脱空现象，面板与坝体的分期施工高差宜控制在15 m以上。【结论】对于采用分期施工方案的高面板堆石坝，应结合工程实际情况，通过有限元计算等方法合理选择适宜的面板与坝体的分期施工高差。 |
| 关键词: 高面板堆石坝 分期施工高差 面板脱空变形 三维有限元子模型法 |
| DOI： |
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| 基金项目:国家自然科学基金项目（50779051） |
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| Effect of height difference in stage construction on the separation deformation between concrete face slab and cushion layer of CFRD |
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WANG Rui-jun,XUE Yi-feng,DU Xin
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| Abstract: |
| 【Objective】This paper studied the influence of height difference in stage construction on the void and deformation of CFRD.【Method】Based on the analysis of void mechanism,3D sub model method was used to study the effects of height difference in stage construction with the consideration of rock-fill rheological characteristics of dam body.Taking a domestic CFRD as example,the void of CFRD caused by different panels and different stage construction methods was analysed.【Result】The height difference in stage construction of panels and dam body had a great influence on void of CFRD.With the increase of the height difference,the void of CFRD decreased gradually.To effectively avoid the void for 200 m CFRD,the height difference of stage construction between panel and dam should be controlled to larger than 15 m.【Conclusion】For installment construction based high CFRD,appropriate height difference between panel and dam body should be chosen with the consideration of actual situation and finite element calculation method. |
| Key words: high CFRD stage construction void of CFRD 3D sub model method |
