温度荷载对抽水蓄能电站蜗壳与外围混凝土传力的影响研究  

Research on the Influence of Temperature Load on the Force Transmission between the Spiral Case and the Surrounding Concrete of the Pumped Storage Power Station

作　　者：钟金盛 钱继源 陈琴[2] 苏海东[2] 崔建华[2] ZHONG Jin-sheng;QIAN Ji-yuan;CHEN Qin;SU Hai-dong;CUI Jian-hua(Anhui Jinzhai Pumped Storage Co.Ltd,Lu’an 237333,Anhui Province,China;Changjiang Water Resources Committee,Changjiang River Scientific Research Institute,Wuhan 430010,Hubei Province,China)

机构地区：[1]安徽金寨抽水蓄能有限公司,安徽六安237333 [2]长江水利委员会长江科学院,武汉430010

出　　处：《中国农村水利水电》2021年第9期153-156,共4页China Rural Water and Hydropower

基　　金：国家重点研发计划项目(2019YFC1510803);中央级公益性科研院所基本科研业务费项目(CKSF2019394/GC);国家自然科学基金项目(51779019)。

摘　　要：在抽水蓄能电站中,由于蜗壳直径相对较小,温度变形引起的传力变化相对于大尺寸的厂房蜗壳更为显著。本文以某抽水蓄能电站为例,通过蜗壳大体积混凝土结构施工和运行过程的温度场与温度应力仿真计算,分析温度变形对蜗壳与外围混凝土间隙及传力的影响。研究表明:冬夏之间的平均传力相差大;相对于通常不考虑温度影响时的设计传压比例,运行期夏季传递给混凝土的压力明显增加,造成混凝土的实际受力大于设计值,增加混凝土开裂风险;结构设计中,应结合实际工程的具体情况,充分考虑温度荷载的影响,通过模拟施工和运行过程的三维有限元仿真分析,获得合理的蜗壳及其外围混凝土的承载比例。The change of force transmission caused by temperature deformation is more significant than that of a large-sized factory volute in pumped storage power stations because of the relatively small diameter.Taking a pumped storage power station as an example,the influence of temperature deformation on the gap and force transmission between the spiral case and the surrounding concrete is analyzed by the numeri⁃cal simulation for the temperature field and temperature stress during the construction and operation process.The research shows that the av⁃erage force transmission between winter and summer is quite different.Compared with the design pressure transfer ratio when the temperature effect is seldom considered,the pressure transferred to the concrete during the summer operation period increases significantly which will cause the actual force of the concrete to be more than the design value and increase the risk of concrete cracking.In the structural design,the specific conditions of the actual project and the influence of temperature load should be considered in combination.The reasonable bearing ratio of the volute and its surrounding concrete should be obtained through the three-dimensional finite element simulation analysis that simulates the construction and operation process.

关 键 词：抽水蓄能电站 蜗壳结构 外围混凝土 温度荷载 传力影响 

分 类 号：TV315[水利工程—水工结构工程]