锦屏一级拱坝左岸混凝土垫座温度资料分析  

Analysis of Temperature Data of Left Bank Concrete Pedestal for Jinping Ⅰ Arch Dam

作　　者：陈晨[1,2] 魏玮[1,2] 江潜成[3] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水利水电学院,南京210098 [3]南昌工程学院水利与生态工程学院,南昌330099

出　　处：《三峡大学学报（自然科学版）》2013年第5期31-35,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：新世纪优秀人才支持计划资助(NCET-11-0628;NCET-10-0359);水利部公益性行业科研专项经费项目(201201038;201101013);江苏省第四期"333工程"培养资金资助项目(BRA2011179;BRA2011145)

摘　　要：锦屏一级拱坝左岸混凝土垫座施工浇筑过程中易产生裂缝,从而降低垫座混凝土的完整性,进而影响拱坝施工运行安全.利用2009年至今锦屏拱坝左岸垫座温度监测资料,根据左岸垫座混凝土的施工特点和实际情况,对温度监测资料进行了分析,绘制出左岸垫座温度场分布图,并对温度场分布图进行再分析.分析表明,锦屏垫座浇筑完成部分已基本处于稳定状态,温降速率较缓慢,温度测值沿高程和水平方向的变化均较平稳,温差在空间上的梯度较均匀,从而降低了微裂缝的产生.结果表明,根据不同浇筑温度、浇筑完毕后不同散热条件采取的不同冷却措施,可及时避免有害情况发生,保证垫座混凝土的施工质量,即温控措施安全有效.Cracks easily occurred in the construction process of the left bank concrete pedestal of Jinping I arch dam, which reduces the integrity of the concrete pedestal and influences the construction and operation safety of the arch dam. The temperature-monitoring data of the left bank concrete pedestal of Jinping I arch dam since 2009 are use. According to the construction characteristics and actual situation methods of analysis of temperature monitoring data, the distribution map of pedestal temperature field is drawn; and the field distri- bution diagram of temperature is analyzed. Analysis shows that Jinping pedestal pouring completed part has been basically in a stable state; temperature drop rate is relatively slow; the temperature measured values a- long the elevation and horizontal direction change smoothly. Gradient of temperature difference on the space is relatively uniform; so as to reduce the generation of microcracks. The results show that according to the dif- ferent pouring temperature, taking different cooling measures after pouring cooling conditions, the harmful situation would be averted just in time~ and the construction quality of the concrete pedestal would be guaran- teed, so as to illustrate the effectiveness and safety of the temperature control measures.

关 键 词：锦屏一级 混凝土垫座 温度监测 温度场 

分 类 号：TV223[水利工程—水工结构工程]