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一、概况用风动气顶台车架设预制的钢筋混凝土拱圈是隧道衬砌大修施工中的一项新没备、新工艺。沈阳桥隧大修段“三结合”技术革新小组,结合沈丹线某隧道拱囤大修施工任务,1973年初,在参加施工的广大工人群众积极支持和兄弟单位大力协助下,经过反复试验和多次改进,终于制成了架设预制钢筋混凝土拱圈的风动气顶台车。用风动气顶台车架拱,就是把隧道内原有己损坏的拱圈铲除到规定的限界要求后,在预制场地把己经预制好的整片钢筋混凝土拱圈,用龙门吊架等吊装到气顶台车的拱托架上,然后用牵引车(如重型轨道车等)把气顶台车牵引到隧道大修地段内需要架拱的位置上;随即由空气压缩机送风,开动风动气顶,把拱托架连同钢筋混凝土拱圈顶起到一定高度,再推动拱托架旋转90度;拱圈正位后,慢慢地排风,
First, an overview of the top of the wind-powered roof mounted prefabricated reinforced concrete arch ring lining overhaul construction of a new equipment, new technology. Shenyang bridge overhaul section “three combination” technology innovation group, combined with a Danfan line arch tunnel store construction tasks, in early 1973, the construction workers in the majority of workers actively support and fraternal units with the great help, after repeated tests and many times Improvement, finally made of erected prefabricated reinforced concrete arch pneumatic roof car. The use of pneumatic roof trolly arch, that is, the tunnel has been damaged within the existing arch ring eradication requirements to the provisions of the limit, the prefabricated site in the prefabricated monolithic reinforced concrete arch ring, with a gantry hanger, etc. to the gas roof Trolley arch brackets, and then use the tractor (such as heavy rail car, etc.) to lift the top car to the tunnel overhaul section of the arches need to arch the location; then by the air compressor to send air, start the top of the wind, The arch bracket together with the reinforced concrete arch ring up to a certain height, and then promote the arch bracket rotation 90 degrees; arch ring, slowly exhaust,