
2014年第9期(总第201期)
doi:10.3969/j. issn. 1009 3230. 2014. 09.003
应用能源技术
混凝土水管冷却布置方式实验探讨
张策,苑木舟,王辉,李敏霞(石家庄铁道大学,石家庄050043)
摘要:随着经济的发展,中国建筑规模越来越大,大型混凝土越来越广泛的应用在建设当中。大型混凝土在施工后水化热过程中,很容易产生温度裂建,引发安全隐惠。文章目的即在于通过研完实验解决这个问题,并在施工中有指导作用。水管冷却方法已经在实际施工中较为普遍应用,但布管方式的效果尚未通过实验验证。文章通过模拟实验的方法比较单管和蛇形管的冷却效果,同时也研究添加相变材料对散热的影响,并记录22h内实验模块内部的温度变化,进行详细的数据分析并与理论结果进行比较和诠释。最后得出结论,单管比蛇形管布置更有利于散热,但考虑到施工,应尽量减少蛇形管的长度。
关键词:大型混凝土;温度裂缝;水管冷却;相变材料
中图分类号:TU528.36
文献标志码:A文章编号:1009-3230(2014)09-0011-05
LargeConcreteStructures During Solidification Temperature
Field Research
ZHANG Ce,YUAN Muzhou,WANG Hui,LI Minxia
(ShijiazhuangRailwayUniversity,Shijiazhuang050043,China)
Abstract: With the development of economy, more and more Chinese construction scale, large concrete is more and more widely used in construction. Hydration heat after big concrete in the construction process, it is easy to produce temperature crack, cause potential safety hazard. Article goal is through the research to solve this problem, and has a guiding role in the construction. Pipe cooling method has widespread application in the actual construction, but the effect of the tube arrangement has not yet been through experimental verification. The article compared the single pipe by using the method of simulation experiment and coil cooling effect, but also studies the effect of adding phase change materials for heat dissipation, and record the temperature change experiment module within 22 hours, carried on the detailed data analysis and compared with theoretical results and interpretation. Finally concluded that the single tube than the coil more conducive to heat dissipation, but considering the construction, should try to reduce the length of the coil.
Key words: Large concrete; Temperature crack; Cooling water pipes; Phase change materials
0引言
大型混凝土在现实中的应用越来越广泛,针对混凝土裂缝这个问题,很多专家学者也进行了深入的研究和探索,比如朱伯芳等人。他们不仅
收稿日期:2014-07-10修订日期:2014-08-10 基金项目:石家庄铁道大学创新创业项目:校内编号
(2012020016):国家威省编号(201310107014)
作者简介:张策,石家庄铁道大学学生。万方数据
11
在软件方面通过程序模拟混凝土内部的温度场,而且在理论方面也进行了充分的计算,得出了冷却水温,通水流量,水管管径,对混凝土散热的影响规律。但是他们都是从理论的角度进行论证,没有经过实际的实验。文中便通过实验的手段针对冷却水管布置方式进行了验证,而且也进行了添加相变材料的效果比较,并得出了相应的结论。