预应力混凝土空心板梁锚端裂缝成因分析与防治措施  

Causes and Prevention Measures for Cracks Adjacent to Anchors of Prestressed Concrete Hollow Slab Beams

作　　者：柳爱群[1] 杨中[1] 尹益辉[2] 

机构地区：[1]鲁东大学,山东烟台264025 [2]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《施工技术》2008年第6期91-92,108,共3页Construction Technology

摘　　要：针对某空心板梁桥在施工中出现锚端裂缝的问题,对照试验结果和现行规范,结合施工经验,分析裂缝产生原因是垫板尺寸小、梁预拱度设置不合理、锚端混凝土局部受压及斜交板钝角支承处反力大等。指出裂缝对梁承载力和正常使用的影响,提出防治措施。最后指出在实际设计施工过程中要注意新老规范的区别,以保证安全。Based on construction experience of cracks treatment adjacent to anchors in a hollow slab beam bridge, cracking causes were analyzed according to test results and current codes, such as small dimension of bearing pads, unreasonable beam pre-camber, local compression of concrete adjacent to anchors and large reaction at obtuse angle support of oblique slabs. Cracks influences on bearing capacity and normal service were proposed, as well as prevention measures. At last, difference between current and old codes was emphasized in order to ensure safety during construction.

关 键 词：桥梁工程 预应力混凝土 锚端裂缝 防治措施 

分 类 号：U448.35[建筑科学—桥梁与隧道工程] TU378.05[交通运输工程—道路与铁道工程]