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无粘结预应力筋在超长、超宽、异形边墙混凝土结构裂缝控制中的应用分析
收稿日期: 2012-07-26
修回日期: 2012-09-10
网络出版日期: 2013-02-19
Application of Noncohesive Prestressed Steel in Crack Control of Superlarge, Superwide and Heteromorphic Side Wall Structures
Received date: 2012-07-26
Revised date: 2012-09-10
Online published: 2013-02-19
为减少地下室混凝土结构在使用中受温差等影响出现的裂缝,结合杭州地铁七堡综合体核心区地下工程实例,边墙采用无粘结后张法预应力及主体结构后浇带的设置技术,针对超长、超宽、异形边墙混凝土结构特点,进一步深化预应力设计,对不设永久伸缩缝混凝土结构开裂的问题进行了阐述,达到减少边墙混凝土结构裂缝控制的目的,实际效果明显。
关键词: 无粘结预应力; 超长、超宽、异性边墙; 混凝土结构; 裂缝控制
郭宏霞 , 董子龙 , 章磊 . 无粘结预应力筋在超长、超宽、异形边墙混凝土结构裂缝控制中的应用分析[J]. 隧道建设, 2012 , 32(增刊2) : 61 -65 . DOI: 10.3973/j.issn.1672-741X.2012.z2.012
Cracks often occur to concrete structure of basement induced by temperature difference. The side wall of the basement structure is prestressed by means of noncohesive method and then the main structure is reinforced. The prestress design is further optimized. The crack problems of concrete structure are discussed. The crack of the concrete structure of side wall is under effective control.
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