Integral assembly bridge whole span beam transportation erection device and construction method

Abstract

The invention discloses an integral assembly bridge whole span beam transportation erection device and a construction method. A transporter unit is used to transport the whole span beam to a place where a bridge erecting device is positioned. The bridge erecting device can be driven to walk, the bridge erecting device comprises a gantry frame structure and a longitudinal beam, and the relative gantry frame structure can move along the longitudinal beam. The longitudinal beam can be driven to move in the longitudinal direction, and a crane on the longitudinal beam can be driven to move along the longitudinal beam. The integral assembly bridge whole span beam transportation erection device is aimed at a wide road and a whole span prefabricated beam of an urban road bridge to minimize the time of working high above the ground of the building of the bridge, to ensure the integrity of a bridge structure, and to significantly reduce the safety risk of the bridge structure in the later using.The carrying of a beam and the erecting of a bridge can be carried out at the same time, so that the construction period of bridge construction is significantly shortened. The device condition for aregion or a road which only need a bridge structure prefabrication plant is provided, so that high intensivism, integration and assembly are achieved, and the bridge construction can be completed withhigh quality, high efficiency and high environmental protection.

Description

technical field [0001] The invention belongs to the field of building structures and bridge engineering, and in particular relates to an integrally assembled bridge whole-span girder transportation and erection equipment and a construction method. Background technique [0002] Prefabricated construction is the development trend of bridges. Porous 20-60m span highways and urban road bridges have a larger length and width and heavier weight. Existing prefabricated bridge construction usually adopts one-span The bridge structure is divided into multiple units vertically and horizontally for prefabrication to facilitate transportation and hoisting to the bridge site, and the prefabricated structural units are installed in place at the bridge span position of the abutment by the bridge erecting machine according to the design requirements, and then on site Pouring the joint concrete between adjacent prefabricated structural units (wet joint assembly) or connecting the whole span ...

AI Technical Summary

Problems solved by technology

[0002] Prefabricated construction is the development trend of bridges. Porous 20-60m span highways and urban road bridges have a larger length and width and heavier weight. Existing prefabricated bridge construction usually adopts one-span The bridge structure is divided into multiple units vertically and horizontally for prefabrication to facilitate transportation and hoisting to the bridge site, and the prefabricated structural units are installed in place at the bridge span position of the abutment by the bridge erecting machine according to the design requirements, and then on site Pouring the joint concrete between adjacent prefabricated structural units (wet joint assembly) or connecting the whole span bridge structure by tensioning prestressed steel bars (dry joint assembly) or welding connection (steel structure assembly); this construction method The requirements for transportation and hoisting conditions are low, but the high-altitude operation time of bridge construction is significantly increased, and the work efficiency is reduced. Under this condition, there are many uncertain factors in the joint connection quality between adjacent prefabricated structural units completed manually. As a result, it is difficult to ensure the integrity of the bridge, leaving a safety hazard for the later use of the bridge structure

[0003] The railway bridge has successfully developed a bridge erecting machine that integrates the transportation and installation of the whole span beam, which avoids the high-altitude operation time caused by the prefabrication-transportation-installation-connection of a span bridge structure divided into multiple units along the vertical and horizontal lines long, the safety risk of operators is high, and there are uncertainties in the overall quality of the structure; but compared with highways and urban road bridges, there are two problems. The construction period is needlessly increased; the second is that the structural system and erection and transportation mechanism of the beam transporting and erecting machine cannot adapt to the transportation of the entire span beam of the highway and urban road bridge with a large width on the completed road, tunnel and bridge, and to be erected in front The piers and bridge spans of the bridge are installed in place

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