The construction method of hoisting the stiffening beam of suspension bridge with cross-cable crane walking with beam

Abstract

The invention provides a construction method for hoisting a stiffening girder of a suspension bridge by adopting girdle-carrying traveling of a deck erection gantry. Firstly, a side span girder segment is mounted through cooperation of reverse pulling systems and the deck erection gantry, is fixed by a prearranged prestress cable-stayed beam and is taken as a hoisting platform for hoisting of other girder segments; a girder field is arranged on one bank, hoisting of all the girder segments is realized through girdle-carrying traveling of the single deck erection gantry, little equipment investment is consumed, the process is simple, the construction efficiency is high, and the cost is low.

Description

technical field [0001] The invention relates to the field of hoisting and construction of stiffening beams of suspension bridges, in particular to a construction method for hoisting and hoisting stiffening beams of suspension bridges by using a cross-cable crane. Background technique [0002] During the construction of the stiffened girder of the suspension bridge, the cross-cable crane is often used for hoisting construction. A cross-cable crane is more suitable for vertical lifting operations. Generally, the stiffening beam to be hoisted is transported to the bottom of the lifting point of the cross-cable crane by a ship, and the cross-cable crane lifts it to an appropriate height through a sling to connect with the sling. However, when the shoal or mountainous area is unnavigable, the stiffened beam can only be transported to one point, and the stiffened beam can be moved to the designed installation position by swinging or erecting a bracket. For example, the name of Chi...

AI Technical Summary

Problems solved by technology

However, the swing method can only transport the stiffened beams for a short distance, the scope of use is limited, and the construction efficiency of the swing is low

[0003] In the prior art, there is also a method of installing stiffening beams by walking with a beam across a cable crane, such as Chinese patent application No. 200910113846.5, titled "A Method for Erecting the Main Girder of a Suspension Bridge Using a Double-machine Double-Hanger Hydraulic Numerical Controlled Cable Crossing Crane" Invention patent, which uses two cross-cable cranes as a group to jointly lift a section of stiffened beam, but it can only realize walking with the beam at the gentle place of the suspension cable, and two cranes are needed at the part with a large inclination angle of the suspension cable The stiffening beam is transported between machines by swinging, which is less efficient

Moreover, this method has complex procedures, requires a lot of equipment, and is costly, and because the beam section cannot pass through the hoisted beam section when walking with the beam, it is necessary to set up beam yards on both sides of the bridge, and install a set of cranes at the cable towers on both banks. , increasing equipment investment, site occupancy and labor costs

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