A concrete segment prefabricated arch rib pre-embedded section steel flat seam bolt type connection positioning device and its construction method

Abstract

The invention discloses a positioning device for achieving embedded-sectional steel flat-joint bolt connection of concrete sectional prefabricated arch ribs and a construction method of the positioning device. The positioning device is arranged at a junction of the concrete sectional prefabricated arch ribs, and comprises a pair of rectangular flanges adopting the same structure, wherein the two rectangular flanges are arranged at the centers of the prefabricated arch ribs respectively; each rectangular flange comprises a flange panel and a flange side plate; bolt connection holes are formed in the flange panels; the flange panels of the two rectangular flanges are fixedly connected through bolts; one end of each flange side plate is connected with the corresponding flange panel; spikes connected with concrete on the prefabricated arch ribs in an embedded manner are arranged at the other ends of the flange side plates. The positioning device is used for rapid positioning and connection of the sectional prefabricated arch ribs, shortens the construction period, improves the adjusting speed and the adjusting accuracy of arch axes of the sectional prefabricated arch ribs, reduces additional unfavorable eccentricity at a joint of the arch ribs, and improves the force performance of a wet joint of the arch ribs.

Description

technical field [0001] The invention relates to an arch rib assembling and positioning device and a construction method of a concrete segmental prefabricated tie-rod arch bridge, belonging to the field of civil engineering bridge engineering. Background technique [0002] Concrete tied arch bridges are more economical than concrete-filled steel tube tied arch bridges, but they have the disadvantages of large volume and mass, so they can only be constructed by cast-in-place construction methods with full support, which not only consumes a lot of steel pipes and timber, but also interrupts the construction of the bridge. The waterway or road transportation below will cause great social impact. When this type of bridge is built on the waterway, large floating cranes can be used. Therefore, the prefabricated construction method with few brackets using segmental prefabricated arch ribs, tie beams and beams is widely used. [0003] Usually, in this kind of prefabricated construct...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing construction technology, the present invention proposes a prefabricated arch rib pre-embedded steel flat seam bolt type connection positioning device for concrete segments, which solves the long construction period caused by wet joints during the installation of prefabricated arch ribs and the adjustment of the arch axis. Difficulty, large additional bending moment caused by eccentricity during installation, etc. At the same time, due to the use of segmental prefabrication and less support construction, it avoids the need for full support during cast-in-place construction, consumes a lot of steel pipes and wood, and takes a lot of labor to erect and dismantle. The problem of social impact caused by interruption of traffic

Images