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某焦化厂的炼焦炉中,分别有2根推焦车轨道梁和2根拦焦车轨道梁,截面均为400mm×400mm,总长约63m;4根轨道梁均为现浇连续梁,采用 C20混凝土浇筑。轨道梁上面要求埋入长350mm或340mm(埋入300mm,外露50mm或40mm)的20或16轨道固定螺栓,总共约900根(纵向间距500～630mm)。图纸要求预埋螺栓的安装精度为:纵向轴线位移≤3mm,间距位移≤10mm,标高允许误差±3mm。为了满足施工精度要求且便于施工,我们研
In a coking plant, there are two coke pusher track beams and two stop cocker track beams in the coke oven, each with a section of 400 mm×400 mm and a total length of about 63 m. The four track beams are cast-in-place continuous beams and use C20. Concrete pouring. Above the track beam, it is required to bury 20 or 16 rail fixing bolts of length 350mm or 340mm (embedded 300mm, exposed 50mm or 40mm), totaling about 900 (pitch 500-630mm). Drawings require the installation accuracy of embedded bolts: longitudinal axis displacement ≤ 3mm, spacing displacement ≤ 10mm, elevation tolerance ± 3mm. In order to meet the construction accuracy requirements and facilitate the construction, we researched