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为研究独塔部分结构构造和设计方法,在广泛收集国内外已建独塔部分斜拉桥设计资料的基础上,列表给出了典型独塔斜拉桥的跨径布置、结构体系,主梁截面形式、高度、宽度及宽跨比,主塔布置形状、截面形式、塔高及高跨比,拉索索面数、形状、材料,在塔身、主梁上的间距等信息,对独塔部分斜拉桥的结构布置方法、主梁、主塔和拉索的结构构造及设计方法等进行了分析和总结.结果表明:独塔部分斜拉桥双跨布置时,副跨占主跨的比例为0.6~1.0,多跨布置时,副跨占主跨的比例为0.4~0.9;适用跨径范围为35~170m.主梁等高度布置时,梁高取主跨跨径的1/40~1/25;变高度布置时,塔根部主梁高度取主跨跨径的1/35~1/20,桥台处主梁为桥墩处主梁的1/1.8~1/1.5.主塔高跨比主要集中在1/5~1/2范围内.独塔部分斜拉桥索面可采用单索面、双索面和三索面形式;梁上的索距为4~6m,塔上索距大小与结构自重、斜拉索索面形状有关.
In order to study the design and construction of partial structure of single tower, on the basis of extensively collecting design data of cable-stayed bridges built at home and abroad, the list gives the span arrangement, structural system, main beam Sectional form, height, width and span ratio, the main tower layout shape, section form, tower height and span ratio, the number of cable face, shape, material, spacing on the tower, the main beam and other information on the single tower The structural layout of partial cable-stayed bridges, the structure and design methods of main girder, main tower and cable are analyzed and summarized.The results show that: when the single-ply cable-stayed bridge is arranged in double span, The ratio is 0.6 ~ 1.0, when the multi-span arrangement, the ratio of the main span of the secondary span is 0.4 ~ 0.9; The applicable span range is 35 ~ 170m. When the height of the main beam is arranged, the height of the main span of the main span is 1/40 ~ 1/25; when the height is arranged, the height of the main girder in the tower root takes 1 / 35-1 / 20 of the main span and the main girder of the abutment is 1 / 1.8-1 / 1.5 of the main girder at the pier. Span ratio is mainly concentrated in the range of 1/5 ~ 1 / 2. Single tower cable-stayed bridge cable surface can be single cable plane, double cable plane and three cable surface form; beam on the beam of 4 ~ 6m, tower Cable distance And the small weight of the structure, the surface shape about cable tension.