Permanent and temporary combined mountainous area deck type arch bridge structure and construction method thereof

Abstract

The invention provides a permanent and temporary combined mountainous area deck type arch bridge structure and a construction method thereof. The permanent and temporary combined mountainous area deck type arch bridge structure comprises an arch support and a bridge abutment which serve as a permanent buckling tower foundation, and a permanent buckling tower lower tower column is located on the arch support and connected with the arch support into a whole; a permanent buckling tower cross beam is mounted at the upper end of the permanent buckling tower lower tower column, and permanent buckling tower upper tower columns are mounted on the two sides of the permanent buckling tower cross beam; a main arch ring is installed between the two arch seats, and an on-arch stand column is erected at the upper end of the main arch ring; and a bridge deck system is erected at the upper ends of the bridge abutment, the permanent buckling tower cross beam and the on-arch stand column. The arch rib is rigidly connected with the permanent buckling tower through the skewback, the skewback serves as a common foundation of the permanent buckling tower and the arch bridge, and the construction measure cost of the arch bridge can be greatly reduced. The overarch high stand columns and approach bridge lower structures within the coverage range of the single-tower cable-stayed bridge are saved, the engineering scale is reduced, and meanwhile damage to mountains on the two sides is reduced.

Description

technical field [0001] The present invention relates to the technical field of civil engineering bridges, and more specifically relates to a construction method of a permanent-adjacent combined mountainous up-supported arch bridge structure. capacity and better economy. Background technique [0002] A bridge is a structure for crossing various obstacles (such as rivers or other structures) in highways, railways, urban roads, rural roads, and water conservancy construction. According to the mechanical characteristics of the structure, the bridge can be divided into beam, arch, rigid frame, suspension and composite system. The arch bridge is a classic bridge structure, which can be divided into upper, middle and lower-supported types according to the position of the bridge deck system. Due to its low building height, strong spanning ability, strong adaptability to mountainous terrain, and good economy, the overhead arch bridge has been widely used in areas where the bridge c...

AI Technical Summary

Problems solved by technology

At present, the maximum span of thrust-supported arch bridges has exceeded 600m. When the span is further increased, the scale of the abutment and the foundation must be significantly increased to resist the horizontal thrust of the arch foot. The construction difficulty of the arch ring structure is also increasing. Construction measures The proportion of construction and installation costs of bridges is constantly rising, which leads to the deterioration of the economy of bridges. Therefore, the construction of arch bridges has become one of the bottlenecks restricting the development of such bridges to large spans.

[0003] Generally speaking, the main factors affecting the increase of the span of overhanging arch bridges in mountainous areas are: (1) After the span exceeds 600m, the horizontal thrust of the arch foot is large, the technical risk increases, the safety of the structure deteriorates, and the engineering economy deteriorates; (2) The construction difficulty of the arch ring structure increases exponentially with the increase of the span, and the increased cost of construction measures also causes a significant reduction in the economy of the arch bridge; (3) The cable-stayed buckle + cable hoisting system often used in the construction of long-span arch bridges , are temporary structures, usually need to build a temporary buckle tower structure, and need to be dismantled after the construction is completed, which increases the difficulty of design and construction of the temporary structure; The height of the bridge structure is high, and the pier heights of the super-long-span arch bridge arch columns, the transition piers of the main approach bridge and the approach bridge piers are relatively high, and the construction cost increases significantly

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