大体积混凝土温控和预应力协同防裂措施  

Synergistic anti-cracking measures of mass concrete by temperature control and prestress

作　　者：王丽[1] 邓继 徐纯霞 朱耀军 蒋梦源 张红石 WANG Li;DENG Ji;XU Chunxia;ZHU Yaojun;JIANG Mengyuan;ZHANG Hongshi(Huai’an Water Conservancy Survey and Design Research Institute Co.,Ltd.,Huai’an 223005,China;Lianshui County Water Conservancy Survey and Design Office,Huai’an 223499,China;Lianshui County Water Ecological Construction Service Center,Huai’an 223499,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Zhejiang Hydrology Management Center,Hangzhou 310009,China)

机构地区：[1]淮安市水利勘测设计研究院有限公司,江苏淮安223005 [2]涟水县水利勘测设计室,江苏淮安223499 [3]涟水县水生态建设服务中心,江苏淮安223499 [4]河海大学水利水电学院,江苏南京210098 [5]浙江省水文管理中心,浙江杭州310009

出　　处：《江苏水利》2022年第7期6-10,15,共6页Jiangsu Water Resources

摘　　要：朱码闸水电站的厂房结构复杂,混凝土体积较大,容易在施工期温度应力的作用下产生裂缝。通水冷却是降低混泥土温度应力的常用方法,而预应力技术是一种降低混凝土结构施工期内部拉应力的新方法。为研究温控和预应力对混凝土施工期拉应力的协同作用效果,运用有限单元法得到了不同预应力张拉荷载作用与不同通水冷却措施下,结构内部产生的拉应力降幅。通过对计算结果的分析,最终确定了各仓混凝土的最优防裂措施。The powerhouse structure of Zhuma sluice Hydropower Station is complex,while the concrete volume is large,which is prone to cracks under the action of temperature stress during construction.Water cooling is a common method to reduce the temperature stress of concrete,and prestressing technology is a new method to reduce the internal tensile stress of concrete structures during construction.In order to study the synergistic effect of temperature control and prestress on tensile stress of concrete during construction,the finite element method was used to obtain the reduction of tensile stress inside the structure under different prestressed tensile loads and different water cooling measures.Through the analysis of the calculation results,the optimal anti-cracking measures for the concrete of each warehouse are finally determined.

关 键 词：预应力 温度应力 混凝土防裂 有限元计算 水电站 

分 类 号：TV122.1[水利工程—水文学及水资源]