巨型水轮机蜗壳垫层埋设方式和监测设计研究  

Cushion Embedding Type Research and Monitor Design of the Giant Spiral Case

作　　者：伍文锋[1] 税思梅[2] WU Wenfeng;SHUI Simei(Spatial Information Technology Co.,Ltd.,Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,China;Chengdu Engineering Corporation Limited of Power China,Chengdu 610072,China)

机构地区：[1]长江勘测规划设计研究院长江空间信息技术工程有限公司,湖北武汉430010 [2]中国电建成都勘测设计研究院有限公司,四川成都610072

出　　处：《人民黄河》2020年第4期140-143,共4页Yellow River

摘　　要：溪洛渡水电站单机容量770 MW,最大水头226 m,蜗壳尺寸大、承受的内水压力高。为设计蜗壳合理的垫层方案,从改善蜗壳结构的受力状况出发,通过建立蜗壳三维有限元模型,进行线弹性计算和非线性有限元计算,对垫层厚度、包角和平面铺设范围以及蜗壳应力、钢筋应力、混凝土裂缝开展与宽度等物理力学指标进行分析,从而确定合理的垫层方案。在结构计算结果的基础上进行蜗壳安全监测设计。针对蜗壳不同结构形状、不同垫层方案选择监测断面;选用多种监测仪器对钢衬及外围混凝土应力、应变进行全面监测,以分析机组运行性态和评价机组运行安全情况。The unit capacity of Xiluodu Hydropower Station is 770 MW and the maximum head is 226 m,having the features of big size of spiral case and high internal water pressure.In order to design reasonable cushion plan for spiral case,starting from improving suffer pressure of volute structure and through establishing three-dimensional finite element model of volute,it conducted linear elastic calculation and non linear finite element calculation.It analyzed the volute stress,reinforcement stress and development and width of concrete cracks physical in dicators for determining a reasonable cushion plan.On the basis of structural calculation results,safety monitoring design of spiral case was carried out.The monitoring section was selected according to the different structural shapes and different cushion schemes.It selected and used various monitoring instrument to conduct overall monitoring in spiral case for analyzing the unit operation behavior and evaluating the safety of unit operation.

关 键 词：水轮机蜗壳 垫层 埋设方式 溪洛渡水电站 

分 类 号：TV734.1[水利工程—水利水电工程]