一种新型无缝桥面伸缩缝的模型试验研究精选.doc

一种新型无缝桥面伸缩缝的模型试验研究 甘勇义1，宁万超2，刘东1，夏招广2，李欣3 (1. 四川成渝高速公路股份有限公司，四川省 成都市 610041；2. 西南交通大学 土木工程学院，四川省 成都市 610031；3. 河南省维路工程材料有限公司，河南省 郑州市 450000；) 摘要：提出一种新型构造形式的无缝桥面伸缩缝结构，是将常用的弹塑体伸缩缝布置在桥梁混凝土现浇结构层，桥面施工时贯通铺筑桥面沥青混凝土层，从而形成真正的无缝桥面结构。为研究无缝桥面伸缩缝结构的使用性能，通过3类伸缩缝结构的室内模型试验，对比分析了无缝桥面结构的伸缩性能以及伸缩过程的力学状态，提出了能满足工程使用的限制条件，根据限制条件在四川成仁高速CR8段千合大桥上进行了对比现场试验，无缝桥面伸缩缝结构在近一年的使用中没有出现明显的破坏，只出现轻微的下层，结果表明无缝桥面伸缩缝结构在满足一定条件时能在实际工程中得到应用。 关键词：简支梁桥；弹塑体；伸缩缝；无缝桥面；室内模型；现场试验 中图分类号：U443.3;U444 文献标志码：A The model test research a new type of seamless bridge expansion joint Gan Yong-Yi1，Ning Wan-Chao2，1，Xia Zhao-Guang2，Li Xin3 (Sichuan ChengYu highway co., LTD., Chengdu 610041,China；2.Southwest jiaotong university institute of civil engineering，Chengdu 610031,China；Henan Provincial WeiLu engineering materials co., LTD ，,China) Abstract: This paper brings forward a new form of seamless bridge expansion joint structure which is commonly using elastic-plastic body expansion joint to allocate in the bridge concrete cast-in-place structure layer, and by which pass through bridge paving asphalt concrete layer bridge construction, thus forming the real seamless bridge deck structure. For the research of seamless bridge expansion joint structure performance, and through the three kinds of expansion joint structure of the indoor model test, analyzing the structure of the bridge deck seamless retractility can and expansion process, this paper puts forward the mechanical state that can meet the engineering use restrictions, according to the compared situ test in Sichuan high speed CR8 section on the bridge in line with restrictions , the seamless bridge expansion joint structure has no apparent damage in the use of nearly a year, appearing only slightly lower, and the results show that seamless bridge expansion could have its practical application by meeting certain conditions. Key words: Simply supported girder bridge; Elastic-plastic body Expansion joint; Seamless bridge deck; Indoor model; Field test 引言 桥梁伸缩装置应该能够满