Prefabricated segment swing shifting method for bridge cantilever assembly

Abstract

The invention relates to a prefabricated section swing shifting method for bridge cantilever assembly, which comprises the following steps that S1, a pier top cast-in-place section and a plurality of prefabricated sections are manufactured before construction; s2, a bridge floor support is installed on the pier top cast-in-place section, a pair of A hinge bearing lifters is installed at the front end of the bridge floor support, the first prefabricated section is lifted to the height of the pier top cast-in-place section through the A hinge bearing lifters, and the first prefabricated section and the pier top cast-in-place section are in butt joint and anchored; and S3, the remaining multiple prefabricated segments are lifted and transferred through the prefabricated segment auxiliary transfer device in sequence so as to be in butt joint with the A hinge bearing lifter, and the multiple prefabricated segments are spliced to form the bridge. According to the prefabricated segment swinging and moving method for bridge cantilever assembly, the multiple prefabricated segments are moved and transported to the cantilever end from the bridge pier in the air to be in butt joint, and the prefabricated section swing shifting method can be used for moving and hoisting the prefabricated segments during cantilever assembly under the bridge without the transportation condition.

Description

technical field [0001] The invention relates to the technical field of bridge construction methods, in particular to a prefabricated segment swing method used for bridge cantilever assembly. Background technique [0002] Cantilever assembly is one of the bridge construction methods. The principle is to transfer and hoist prefabricated sections of beams (concrete beams or steel beams) or arch ribs to the ends of the completed structure in sequence, so that the cantilever will continue to increase until Close up in the middle of the span, or directly reach the next abutment. The overall construction steps are as follows: complete the prefabrication of the segments while completing the piers (or bridge towers, abutments), first construct the No. 0 block, then install the prefabricated segments in sequence, and finally close the dragon. Compared with the cantilever pouring method, the cantilever assembly method has the advantage of fast construction speed. [0003] There are t...

AI Technical Summary

Problems solved by technology

However, this method is specially used for suspension bridges and cannot be directly used for cantilever assembly. The main problem is that the cable crane hoists and walks on the long load-bearing cables of the suspension bridge, and the cantilever assembly does not have a load-bearing cable to support the cable crane. With cantilever support, the prefabricated section cannot be docked with the cantilever end; the second is that the lifting point of the cable crane is inside the support point and cannot be used on the bridge deck

Images