| 高碾压混凝土坝快速施工过程中的温度控制措施 |
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| 引用本文： | 井向阳,周伟,刘俊,常晓林.高碾压混凝土坝快速施工过程中的温度控制措施[J].武汉大学学报(工学版),2013,46(1):99-104,108. |
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| 作者姓名： | 井向阳 周伟 刘俊 常晓林 |
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| 作者单位： | 1. 武汉大学水资源与水电工程科学国家重点实验室,湖北武汉,430072
2. 中国水电顾问集团成都勘测设计研究院,四川成都,610072 |
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| 基金项目： | 国家自然科学基金项目(编号:50909078) |
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| 摘 要： | 提出了高碾压混凝土坝施工期温度时空动态控制方法,该方法的核心在于通过调整水管冷却的5个要素(冷却开始时刻、通水时间、水温、流量和水流方向)来动态控制混凝土的温度,进而达到温控防裂的要求.基于ANSYS平台开发了大体积混凝土施工期温度场、应力场三维有限元仿真程序,将温度时空动态控制方法应用于官地高碾压混凝土重力坝的施工过程中,并做跟踪监测和反演计算.实践证明,该方法易于操作,且在官地大坝的施工过程中未出现危害性的裂缝,有效解决了其温控防裂问题,给类似工程提供了借鉴和参考.
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| 关 键 词： | 高碾压混凝土坝 温度时空动态控制方法 水管冷却 有限元 温度应力 |
Dynamic control measures of concrete temperature in rapid construction of high RCC dams |
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| JING Xiangyang,ZHOU Wei,LIU Jun,CHANG Xiaolin.Dynamic control measures of concrete temperature in rapid construction of high RCC dams[J].Engineering Journal of Wuhan University,2013,46(1):99-104,108. |
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| Authors: | JING Xiangyang ZHOU Wei LIU Jun CHANG Xiaolin |
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| Affiliation: | 1(1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China; 2.Hydrochina Chengdu Engineering Corporation,Chengdu 610072,China) |
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| Abstract: | The temperature space-time dynamic control method is proposed.Through adjusting five factors:beginning time of cooling,cooling time,water temperature,rate of flow and direction of flow in pipe cooling,the concrete temperature in construction can be controlled dynamically;and then reach the requirements of temperature control and crack prevention.A 3D finite element simulation program is developed to analyze temperature field and stress field based on ANSYS.The temperature space-time dynamic control method is applied to the rapid construction of Guandi high RCC gravity dam;meanwhile,the monitoring and tracking and the inversion calculation are conducted.It is found that the method works quite well,there are no large harmful cracks in the construction of Guandi RCC dam.This method can effectively solve the problem of temperature control and crack prevention of Guandi dam,and provide some guide and reference to other similar projects. |
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| Keywords: | high RCC dam temperature space-time dynamic control method pipe cooling finite elements thermal stress |
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