湖南城市学院学报：自然科学版
湖南城市學院學報：自然科學版
호남성시학원학보：자연과학판
Journal of Hunan City University:Natural Science
2011年
3期
5-8
,共4页
桥梁工程%双曲拱%增大主拱圈截面面积%加固
橋樑工程%雙麯拱%增大主拱圈截麵麵積%加固
교량공정%쌍곡공%증대주공권절면면적%가고
bridge project%the two-way curved arch bridge%modification of the main arch-section%reinforcement
针对湖南省现存双曲拱桥主拱圈的主要病害,分析了病害产生的原因,介绍了加固处治方法.以某大桥为例,阐述了双曲拱桥拱肋底缘利用现浇混凝土底板,将主拱圈封闭形成箱形,从而把双曲拱桥改造成为箱型拱,并通过增大主拱圈的截面面积提高其承载能力;同时将拱式腹拱及拱顶实腹段等拱上建筑拆除后,对腹拱墩加固之后在墩顶设置墩帽重建为连续板式拱式建筑,从而达到减轻恒载,调整主拱圈受力状态,改善桥梁荷载横向分布性能,提高结构刚度和整体性.在湖南省旧桥改造中该加固方法可加以运用.
針對湖南省現存雙麯拱橋主拱圈的主要病害,分析瞭病害產生的原因,介紹瞭加固處治方法.以某大橋為例,闡述瞭雙麯拱橋拱肋底緣利用現澆混凝土底闆,將主拱圈封閉形成箱形,從而把雙麯拱橋改造成為箱型拱,併通過增大主拱圈的截麵麵積提高其承載能力;同時將拱式腹拱及拱頂實腹段等拱上建築拆除後,對腹拱墩加固之後在墩頂設置墩帽重建為連續闆式拱式建築,從而達到減輕恆載,調整主拱圈受力狀態,改善橋樑荷載橫嚮分佈性能,提高結構剛度和整體性.在湖南省舊橋改造中該加固方法可加以運用.
침대호남성현존쌍곡공교주공권적주요병해,분석료병해산생적원인,개소료가고처치방법.이모대교위례,천술료쌍곡공교공륵저연이용현요혼응토저판,장주공권봉폐형성상형,종이파쌍곡공교개조성위상형공,병통과증대주공권적절면면적제고기승재능력;동시장공식복공급공정실복단등공상건축탁제후,대복공돈가고지후재돈정설치돈모중건위련속판식공식건축,종이체도감경항재,조정주공권수력상태,개선교량하재횡향분포성능,제고결구강도화정체성.재호남성구교개조중해가고방법가가이운용.
According to existing double-curvature arch bridge in Hunan Province and analysis of the main diseases of the arch ring,this paper introduces the strengthening treatment method.Adversity hyperbolic arch bridge in the old arch rib margin at the bottom of cast-in-place concrete floor makes the main Arch become a closed box,thus it transforms the two-way curved arch into the Box-shaped arch,through increasing cross-section of the main Arch area,thus increasing its load ability.Meantime,after removing the Spandrel Arch and the vault of Solid-web and other Spandrel Construction,then strengthening the Spandrel Arch pier,after setting for the reconstruction of consecutive plate arch construction,in the top pier cap,thereby it reduces dead load to adjust the main Arch force to improve the load transverse distribution coefficient,and to improve the carrying capacity of the bridge.
