Dragging device and construction method of large steel beams based on finely rolled deformed steel bars and continuous hydraulic jacks

Abstract

The invention relates to a dragging device of large steel beams based on finely rolled deformed steel bars and continuous hydraulic jacks. Dragging slide structures are arranged at dragging points between bridge piers and steel beams; the dragging slide structures are connected with continuous dragging structures through the finely rolled deformed steel bars; the dragging slide structures are in slide connection with the steel beams through dragging counterforce rails; the dragging counterforce rails are arranged along the bridge direction; displacement, pressure and distance measurement sensing components are arranged between each dragging slide structure and each bridge pier; each dragging slide structure communicates with a hydraulic station; each hydraulic station communicates with a field control unit; and each field control unit communicates with a main control unit and corresponding displacement, pressure and distance measurement sensing components. The invention also disclosesa construction method of the device. The dragging device and the construction method have the beneficial effects that erection of the steel beams across channels, railways and expressways in complex environments can be realized, dragging devices arranged on a plurality of bridge piers can be controlled simultaneously, and the dragging displacement can be ensured to be equal to the actual displacement of the steel beams.

Description

Technical field [0001] The invention relates to the technical field of bridge construction, and in particular to a large-scale steel beam traction device and a construction method based on fine-rolled screw steel and continuous hydraulic roof. Background technique [0002] With the large-scale infrastructure construction in China, the surrounding environment of the projects that need to be constructed is becoming more and more complex, especially the construction of bridge steel beams across waterways, expressways, and existing railway lines. In order not to affect the operation of the original facilities and ensure safety, no Cantilever assembly technology is allowed. Segmental hoisting requires large-scale machinery and equipment for transportation and hoisting. However, the existing continuous jacks are combined with steel stranded wire pulling (Announcement Nos. CN101831874A and CN102359071A). Continuous jacks pull steel beams or large structural parts through steel stranded w...

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Problems solved by technology

[0002] With the large-scale construction of my country's infrastructure, the surrounding environment of the projects that need to be constructed is becoming increasingly complex, especially the construction of bridge steel beams that cross waterways, expressways, and existing railway lines. In order not to affect the operation of the original facilities and ensure safety, we do not The cantilever assembly process is allowed, and segmental hoisting requires large-scale mechanical equipment for transportation and hoisting, while the existing continuous jacks are dragged with steel hinge lines (notice numbers CN101831874A and CN102359071A), and continuous jacks pull steel beams or large structural parts through steel hinge lines , due to its own elastic modulus characteristics and the large number of steel hinges, the displacement of each continuous jack collected and controlled in the system is transmitted through the unequal elastic elongation factors of the steel hinges, which cannot be achieved in actual construction. The effect of synchronous promotion

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