水冷却温度控制技术在大体积混凝土工程中的应用研究

发布时间：2018-01-07 10:04

本文关键词：水冷却温度控制技术在大体积混凝土工程中的应用研究　出处：《青岛理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：大体积混凝土施工过程中，水化热引起混凝土内部温度急剧升高，，不易散发，而表面散热较快，从而形成内外温差，混凝土表面产生拉应力，导致裂缝出现。本文通过对大体积混凝土裂缝机理进行研究，提出了控制温度应力和防止裂缝的技术措施，着重从大体积混凝土温度场及应力场给予阐述，通过有限元热传导方程深入分析，得出水管冷却的一期计算方程，并且详细阐明了水管布置与降温效应的关系。通过天钢2000m3高炉基础大体积混凝土实例，掌握大体积混凝土内部温度和应力变化规律，对水管冷却效果给予充分验证，取得了较好的效果，得到相关部门的好评。本文所进行的工作及一些结论可以为大体积混凝土结构的设计、施工提供了参考。
[Abstract]:During the construction of mass concrete, the heat of hydration causes the internal temperature of concrete to rise sharply, which is not easy to emit, but the heat dissipation of the surface is faster, thus forming the difference of internal and external temperature, resulting in tensile stress on the surface of concrete and resulting in the appearance of cracks. In this paper, the crack mechanism of mass concrete is studied, and the technical measures of controlling temperature stress and preventing crack are put forward, especially from the temperature field and stress field of mass concrete. Based on the analysis of the finite element heat conduction equation, the first stage calculation equation of the cooling of the outlet pipe is obtained, and the relationship between the arrangement of the pipe and the cooling effect is explained in detail. Through the example of mass concrete of 2000m3 blast furnace foundation of Tianshan Iron and Steel Co., the internal temperature and stress of mass concrete are grasped, the cooling effect of water pipe is fully verified, and good results are obtained. The work carried out in this paper and some conclusions can provide reference for the design and construction of mass concrete structure.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU755

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