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Using method of main arch of deck type steel truss arch bridge in mountainous area
The invention relates to a method for using a main arch of a deck type steel truss arch bridge in a mountainous area, which comprises the following specific steps of: 1) selecting an arch axis coefficient to be 1.5-2.0 and a rise span ratio to be 1/4-1/6; (2) adjusting arch axes with different spans when the distance between the arch crown and the bridge floor is 4m so as to ensure that an arch support is not suspended due to holding force; (3) the transverse width of the arch is 1/20 of the span; 4) adopting a P-type truss on the vertical surface of a main truss, adopting continuous K-shaped support arrangement on upper and lower chord parallel connections of arch ribs, longitudinally arranging the P-type truss, taking a rise span ratio of 1/4-1/6 as 1/5, taking a rib center line as a catenary, taking an arch axis coefficient of 1.5-2.0, taking an arch axis coefficient of 2.0, taking a high span ratio of an arch crown of the deck type steel truss arch bridge as 1/30-1/45, taking 1/43 of the arch crown, taking 1/36 of arch feet, and taking 1/4 of the arch crown as a main truss; and a bolted connection mode is adopted between the coupling and the main truss as well as between the coupling rod pieces at the joints. According to the using method of the deck type steel truss arch bridge main arch in the mountainous area, full-assembly type beams and stand columns can be matched, transportation and installation in the mountainous area are facilitated, the whole can be broken up into parts, and rapid construction in the mountainous area is achieved.
本发明涉及山区上承式钢桁拱桥主拱的使用方法，具体步骤如下：1）、拱轴系数取1.5‑2.0，矢跨比取1/4‑1/6；2）、拱顶距离桥面4m，调整不同跨径的拱轴线，以确保拱座持力不悬空；3）、拱横向宽度取跨径的1/20；4）、主桁立面采用P型桁，拱肋上、下弦平联均采用连续“K”字撑布置，P式桁架纵向布置，1/4‑1/6的矢跨比，矢跨比取1/5，肋中心线为悬链线，拱轴系数采用1.5‑2.0，拱轴系数取2.0，上承式钢桁拱桥的拱顶高跨之比取在1/30‑1/45，拱顶取1/43，拱脚取1/36，联结系与主桁之间以及联结系杆件在节点处均采用栓接的连接方式。该山区上承式钢桁拱桥主拱的使用方法,可配合全装配式梁和立柱，便于山区运输、安装，能化整为零，实现山区快速化施工。
Using method of main arch of deck type steel truss arch bridge in mountainous area
The invention relates to a method for using a main arch of a deck type steel truss arch bridge in a mountainous area, which comprises the following specific steps of: 1) selecting an arch axis coefficient to be 1.5-2.0 and a rise span ratio to be 1/4-1/6; (2) adjusting arch axes with different spans when the distance between the arch crown and the bridge floor is 4m so as to ensure that an arch support is not suspended due to holding force; (3) the transverse width of the arch is 1/20 of the span; 4) adopting a P-type truss on the vertical surface of a main truss, adopting continuous K-shaped support arrangement on upper and lower chord parallel connections of arch ribs, longitudinally arranging the P-type truss, taking a rise span ratio of 1/4-1/6 as 1/5, taking a rib center line as a catenary, taking an arch axis coefficient of 1.5-2.0, taking an arch axis coefficient of 2.0, taking a high span ratio of an arch crown of the deck type steel truss arch bridge as 1/30-1/45, taking 1/43 of the arch crown, taking 1/36 of arch feet, and taking 1/4 of the arch crown as a main truss; and a bolted connection mode is adopted between the coupling and the main truss as well as between the coupling rod pieces at the joints. According to the using method of the deck type steel truss arch bridge main arch in the mountainous area, full-assembly type beams and stand columns can be matched, transportation and installation in the mountainous area are facilitated, the whole can be broken up into parts, and rapid construction in the mountainous area is achieved.
本发明涉及山区上承式钢桁拱桥主拱的使用方法，具体步骤如下：1）、拱轴系数取1.5‑2.0，矢跨比取1/4‑1/6；2）、拱顶距离桥面4m，调整不同跨径的拱轴线，以确保拱座持力不悬空；3）、拱横向宽度取跨径的1/20；4）、主桁立面采用P型桁，拱肋上、下弦平联均采用连续“K”字撑布置，P式桁架纵向布置，1/4‑1/6的矢跨比，矢跨比取1/5，肋中心线为悬链线，拱轴系数采用1.5‑2.0，拱轴系数取2.0，上承式钢桁拱桥的拱顶高跨之比取在1/30‑1/45，拱顶取1/43，拱脚取1/36，联结系与主桁之间以及联结系杆件在节点处均采用栓接的连接方式。该山区上承式钢桁拱桥主拱的使用方法,可配合全装配式梁和立柱，便于山区运输、安装，能化整为零，实现山区快速化施工。
Using method of main arch of deck type steel truss arch bridge in mountainous area
山区上承式钢桁拱桥主拱的使用方法
CHEN FENGMIN (author) / LUO LIXIANG (author) / ZHENG SHENGBAO (author) / HU XUHUI (author) / CUI YINGMING (author) / ZENG YAOZHENG (author) / CHEN XIN (author)
2023-07-04
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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