Spatial cable suspension bridge main cable construction assisting device and main cable construction method

Abstract

The invention discloses a spatial cable suspension bridge main cable construction assisting device. The spatial cable suspension bridge main cable construction assisting device comprises spatial cablefixing brackets and main cable strand wire temporary fixing devices, wherein a transverse support and two longitudinal supports are arranged on each spatial cable fixing bracket; the top ends of thelongitudinal supports are connected with the transverse support to form a trapezoid; the bottom ends of the longitudinal supports are connected with a main bridge steel box girder; the longitudinal supports are positioned on a spatial cable design plane of a main cable; the main cable strand wire temporary fixing devices are arranged at the upper parts of the two sides of the spatial cable fixingbrackets; each main cable strand wire temporary fixing device comprises an external sleeve, a plurality of locating cable clips and a connecting plate; a main cable strand wire penetrates through thelocating cable clips; the adjacent locating cable clips are spliced with each other within the same plane; the adjacent locating cable clips are connected with each other through connecting plates; the twisting of the main cable can be effectively prevented; the phenomena that the internal and external stresses are not balanced and the safety stock of the main cable is reduced due to the wire swelling phenomenon generated in the main cable mounting process are avoided; and the phenomenon that a spatial sling cannot enter a hole or is not perpendicular to the anchoring surface can be avoided.

Description

technical field [0001] The invention belongs to the field of bridges, and relates to a space cable suspension bridge, in particular to a main cable construction auxiliary device and a main cable construction method of a space cable suspension bridge. Background technique [0002] Traditional suspension bridges are generally planar cable-shaped suspension bridges, including main cables, suspension cables, stiffening beams, main towers and main cable anchorage components. The main cable and the sling are located in the same vertical plane, so the main cable only has a vertical sag, and all the slings only need to hang without considering the inclination angle of the transverse bridge. Traditional suspension bridges often consist of two parallel cable planes. The traditional suspension bridge adopts hoisting construction, that is, the method of "cable first and girder later". The upper end of the sling is connected to the cable clamp; ④ Hoist the stiffening beam, and hoist th...

AI Technical Summary

Problems solved by technology

[0007] For the space cable suspension bridge, the problem to be solved: after the main cable is erected, the state of the empty cable is a plane cable shape, that is, there is only vertical sag but no horizontal sag, which is very different from the space cable shape in the bridge state in the transverse bridge direction. Big

[0010] When the above-mentioned temporary sling scheme first grasps the main cable in a sagging state and then spreads the main cable horizontally outward, the following problems will occur: ① The main cable will be twisted under the action of gravity; ② The main cable strands will be twisted under the gravity. Under the action, there will be wire drumming, and in severe cases, the strands will even be broken, resulting in unbalanced internal and external forces and reducing the safety reserve of the main cable; After the wire is pre-tensioned, the cable clamp needs to be tensioned after positioning, and the construction process is complicated; ④ Due to the pre-tensioning of the main cable strands, the positioning of the cable clamp is difficult, the angle is not easy to control, and the construction is difficult; ⑤ If the boom anchor is designed The box is located inside the main girder. If the traditional construction method is used, there will inevitably be phenomena that the suspenders cannot enter the hole or be separated to varying degrees, and the construction is difficult and the accuracy is difficult to control.

Therefore, the traditional space cable suspension bridge main cable suspension construction scheme no longer meets the current demand for high-standard and high-precision construction quality, and requires new construction methods

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