| 地铁车站结构温度裂缝的控制与实例 |
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| 引用本文： | 孙智勇 张丁盛. 地铁车站结构温度裂缝的控制与实例[J]. 都市快轨交通, 2009, 22(1): 48--50 |
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| 作者姓名： | 孙智勇 张丁盛 |
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| 作者单位： | 北京城建设计研究总院,北京,100037;北京城建设计研究总院,北京,100037 |
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| 摘 要： | 依据地铁车站的温度裂缝理论,说明混凝土收缩及温差是结构产生温度裂缝的主要原因,分析温度缝设置的合理间距,以及取消温度缝的可能性与措施.采取以防为主,使用温控施工技术,降低水化热值则能起到加大温度缝间距的目的.根据这个原理,可以在施工过程中采取一定措施;结合工程实例,分析影响隧道温度应力的因素,如水化热、骨料、入模温度、养护、后浇带等,并给出相应的工程建议.
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| 关 键 词： | 温度裂缝 裂缝间距 温度应力 地下结构 |
| 修稿时间： | 2013-12-12 |
Thermal-crack Control Practice for Subway Station Structure |
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| Sun Zhiyong,Zhang Dingsheng. Thermal-crack Control Practice for Subway Station Structure[J]. Urban Rapid Rail Transit, 2009, 22(1): 48--50 |
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| Authors: | Sun Zhiyong Zhang Dingsheng |
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| Affiliation: | Beijing Urban Engineering Design & Research Institute;Beijing 100037 |
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| Abstract: | Based on the theory of thermal cracks in the concrete of metro station structures,the paper indicates that shrinkage and temperature changes are the main causes for the cracks.It analyzes the possibility for increasing the interval between deformation joints and even canceling out deformation joints at all with corresponding countermeasures.Construction factors affecting thermal stresses are listed,for example,hydration heat,gravel size,temperature of moulds,curing,final-casting,etc.,with some engineering s... |
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| Keywords: | thermal crack crack interval thermal stress underground structure |
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