论文部分内容阅读
某铁路专运线上的I号桥,是建于1969年初的平桥,跨度9m,净空5m,桥宽2.5m,采用2根现浇钢筋混凝土T形梁承受上部传来的荷载。 1998年3月,对该桥观测时发现,2根大梁的主筋保护层有30％脱落,钢筋锈蚀严重。锈点最大深度为3.5mm,且每根梁上有4-5条裂缝,最长裂缝达530mm、宽3.5mm,梁与桥墩接触面也有明显的缝隙。经研究分析,需进行加固处理。
I on a railway line of the I Bridge, is built in early 1969 Pingqiao, span 9m, 5m clearance, bridge width 2.5m, the use of two cast-in-place reinforced concrete T beams to withstand the load from the upper part. In March 1998, when observing the bridge, it was found that 30% of the main girder protective layer of the two girders fell off and the steel bars corroded seriously. The maximum depth of the rust point is 3.5mm, and there are 4-5 cracks on each beam. The longest cracks reach 530mm and the width is 3.5mm. There is obvious gap between the contact surface of beam and bridge piers. After research and analysis, need to be reinforced.