摘要
为向未来抽水蓄能电站建设提供更多的设计方案以适应新的需求,提出了变厚度的超薄垫层埋设新技术代替充水保压工艺进行蜗壳埋设,这种工艺可以减少加压设备及闷头的费用,并大大缩短工期。结合某实际工程建立了水电站厂房整体的三维有限元模型,系统比较了超薄垫层蜗壳和充水保压蜗壳的传力特性。研究发现,抽水蓄能电站采用末端加厚的变厚度超薄垫层蜗壳时,外包混凝土的应力分布规律、承载比与充水保压蜗壳非常接近,同样可以起到降低蜗壳内水压力外传、减小外包混凝土应力的目的,且机墩与座环结构的不均匀变形分布规律均保持一致,不会对其稳定运行造成不利影响。
To provide more design schemes for the future construction of pumped storage power station to meet the new requirements,this paper proposes a new technology of embedding ultra-thin cushion layer with variable thickness to replace the water-filling and pressure-maintaining process for embedding spiral case,which can reduce the cost of pressurizing equipment and boring head and greatly shorten the construction period.This paper establishes a three-dimensional finite element model of the hydropower plant in combination layer with a practical project,and systematically compares the stress transfer mechanisms of ultra-thin cushion layer volute and water-filled pressure-retaining volute.Research has found that the stress distribution pattern and bearing ratio of the wrapped concrete are very close to those of the water-filled pressure-retaining volute when the ultra-thin cushion layer volute with variable thickness is used in the pumped storage power station,which can also reduce the water pressure transmission in the volute and the stress of the wrapped concrete,and the uneven deformation distribution pattern of the pier and the seat ring structure remain consistent,which will not adversely affect its stable operation.
作者
刘丰潇
伍鹤皋
LIU Feng-xiao;WU He-gao(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China)
出处
《水电能源科学》
北大核心
2025年第10期150-154,共5页
Water Resources and Power
关键词
抽水蓄能电站
薄垫层蜗壳
充水保压蜗壳
混凝土承载比
有限元分析
pumped storage power station
thin cushion layer volute
water-filled pressurized volute
concrete bearing ratio
finite element analysis
