摘要
针对安庆长江铁路大桥64 m等高简支预应力混凝土箱梁的施工特点,分析了混凝土结构裂缝产生的原因,提出了等高简支预应力混凝土箱梁裂缝控制措施,特别是采用了预张拉预应力束的方式控制混凝土裂缝的产生。实践证明,采取这些措施对混凝土箱梁裂缝控制效果是明显的。
In light of the construction features of 64 m same-height simply-supported prestressed concrete box-girder on Yangtze river railway bridge in Anqing, the paper analyzes the concrete structure cracking causes, puts forward cracks control measures of same-height simply-suppor- ted prestressed concrete box-girder, and especially adopts prestressing tendons to control concrete cracks. Practice proves that： the above men- tioned measures are effective for controlling concrete box-girder cracks.
出处
《山西建筑》
2012年第26期187-188,共2页
Shanxi Architecture
关键词
简支箱梁
混凝土结构
裂缝
预应力束
simply-supported box-girder, concrete structure, crack, prestressing tendons
