袁炼 项世芳 李金锋
摘 要:随着社会经济的飞速发展,我国城市高架桥钢箱梁吊装施工技术也在不断地进步,作为城市道路上的桥梁,高架桥的主要构成是高职称机构以及支柱,通过疏通交通的密度,使得土地面积能够被充分利用的同时还可以使运输效率提高,钢箱梁以其力学性能优良、外观平整、主梁跨度大、工期短等优点被广泛应用于城市高架桥的建设中。该文根据一个具体的案例项目,确定了高桥钢箱梁的吊装方案,选择起重机,确定吊点位置,选择钢丝绳,进行钢箱梁吊装时焊接过程的稳定性控制和分析。
关键词:高架桥 钢箱梁 施工技术 分析
中图分类号:U448 文献标识码:A 文章编号:1672-3791(2021)11(a)-0000-00
Analysis on Hoisting Construction Technology of Steel Box Girder of Urban Viaduct
YUAN Lian XIANG Shifang LI Jinfeng
(Tengda Construction Group Co., Ltd., Hangzhou, Zhejiang Province, 310000 China)
Abstract: With the rapid development of social economy, the construction technology of steel box girder for urban viaducts in my country has also been continuously improved. As a bridge on urban roads, the main components of viaducts are high-level institutions and pillars. By dredging the density of traffic, the land area is increased. It can be fully utilized and can also improve transportation efficiency. Steel box girder is widely used in the construction of urban viaducts due to its excellent mechanical properties, flat appearance, large main girder span, and short construction period. According to a specific case project, this article determines the hoisting plan of the steel box girder of Gaoqiao, selects the crane, determines the position of the hoisting point, selects the wire rope, and controls and analyzes the stability of the welding process during the hoisting of the steel box girder.
Key Words: Viaduct; Steel box girder; Construction technology; Analysis
1 高架橋介绍
目前,从桥梁未来的发展趋势来说,高架桥有着较多优势,这是因为高架桥属于一种立交桥,但有高钢筋混凝土以及砖石拱门,在城市不断发展的过程中,交通拥堵使用此类桥梁可以疏散交通密度,此外,城际公路和铁路线路跨平面,节省土地,若要消除使用道路的需要可使用堤防和此类桥梁[1]。这种类型的桥梁受现存建筑的限制和线路要求的约束。许多弯曲和倾斜的桥梁、连续梁(或拉面)和悬臂梁比较少见。使用简支梁时确保桥面水平梁是光滑的,通常只是由连续桥的桥面支撑。如果连续梁与墩顶连接紧密,则为连续梁。如果桥梁跨度不大,可以采用板式结构,其美观、板厚。因此,有些没有经过改造或仅沿水平桥进行了改造,具有类似真菌的结构,较大的跨度通常会产生肋状或盒状截面。……