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本文结合实际工程,阐述了对缺失图纸的空心板桥进行病害识别和检测评估方法和步骤。检测桥梁时首先对桥面铺装情况进行检查,对其裂缝走势进行判断。在本文的大庆桥上,桥梁铺装呈现有规律的纵向裂缝和横向裂缝,由此初步判断可能出现了空心板铰缝缺损,造成单板受力。然后到桥下对桥梁进行外观检查,发现中间部分几块板确实受力裂缝较为密集,是受力偏大的体现。结合对混凝土强度、锈蚀电位、氯离子含量等进行材质状况检测,判断结构内部钢筋未出现显著锈蚀,混凝土强度基本满足要求。综合考虑上述情况,认为该桥总体是安全的,但是因为年代久远,铰缝连接性能有一定程度的削弱,导致局部单板受力,建议对上部结构进行针对性的维修加固。
In this paper, combined with the actual project, elaborated on the lack of drawings of hollow slab bridge disease identification and detection methods and steps. When testing the bridge deck bridge deck first check the situation, to judge the trend of cracks. In this paper, Daqing Bridge, the bridge pavement presents a regular longitudinal cracks and transverse cracks, which initially determine the possibility of hollow plate hinge joint defects, resulting in veneer stress. And then to the bridge under the appearance of the inspection and found that the middle part of a few plates really stress cracks are more dense, is the embodiment of the force is too large. Combined with the concrete strength, corrosion potential, chloride content and other material status testing to determine the structure did not appear significant corrosion of steel, concrete strength to meet the basic requirements. Considering the above situation, the bridge is generally considered safe, but because of the passage of time, the hinge joint performance has been somewhat weakened, resulting in partial veneer stress, the proposed structure of the superstructure for targeted repair and reinforcement.