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Sensitivity Analysis of Temperature Control Parameters and Study of the Simultaneous Cooling Zone during Dam Construction in High-Altitude Regions

机译:高海拔地区大坝施工温度控制参数敏感性分析及同时冷却带研究

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摘要

There are unprecedented difficulties in building concrete gravity dams in the high altitude province Tibet with problems induced by lack of experience and technologies and unique weather conditions, as well as the adoption of construction materials that are disadvantageous to temperature control and crack prevention. Based on the understandings of the mentioned problems and leveraging the need of building gravity dam in Tibet, 3D finite element method is used to study the temperature control and crack prevention of the dam during construction. The calculation under recommend temperature control measures and standards shows that the height and number of simultaneous cooling zone have the more obvious influencers on concrete stress; therefore, it is suggested to increase the height of simultaneous cooling zone to decrease the stress caused by temperature gradient of adjoin layers so as to raise the safety level of the whole project. The research methods and ideas used on this project have significant values and can be taken as references in similar projects in high altitude regions.
机译:由于缺乏经验和技术以及独特的天气条件,以及采用不利于温度控制和防裂的建筑材料,在高海拔省份西藏修建混凝土重力坝面临着前所未有的困难。基于对上述问题的认识,并结合西藏修建重力坝的需要,运用3D有限元方法研究了坝体在施工过程中的温度控制和防裂性能。根据推荐的温度控制措施和标准进行的计算表明,同时冷却区的高度和数量对混凝土应力的影响更为明显。因此,建议增加同时冷却区的高度,以减少由于相邻层的温度梯度所引起的应力,从而提高整个工程的安全水平。该项目所采用的研究方法和思想具有重要价值,可以在高海拔地区的类似项目中作为参考。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第4期|528589.1-528589.12|共12页
  • 作者单位

    China Inst Water Resources & Hydropower Res, Dept Struct & Mat, Beijing 100038, Peoples R China.;

    China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China.;

    China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China.;

    Henan Yellow River Reconnaissance Design & Res In, Beijing Branch, Beijing 100073, Peoples R China.;

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