Railroad business line box bridge extension construction method

Abstract

The invention discloses a railroad business line box bridge extension construction method. The railroad business line box bridge extension construction method comprises the steps of 1, arrangement ofdrilling points and drilling; 2, expansion slurry injection; 3, removal of concrete on the inner side of a flare wing wall; 4, extension of a railroad business line box bridge. In the method, part ofthe flare wing wall of the box bridge is removed, the remaining part of the flare wing wall has a supporting effect on a roadbed behind the flare wing wall, the basic concrete structure of the flare wing wall can serve as the basis of a box bridge body which is about to be extended later, the construction period is short, the construction quality is ensured, the problem about the safety and protection of a business line is solved, the protection engineering quantity is greatly reduced, and the protection construction process is simplified.

Description

technical field [0001] The invention belongs to the technical field of construction of box-shaped bridge lengths, and in particular relates to a construction method for box-shaped bridge lengths of railway business lines. Background technique [0002] In railway construction, it is often necessary to extend the existing box-shaped bridges due to the addition of the second line or the reconstruction of the station yard. During the construction of the box-shaped bridges, the adjacent business lines are in normal operation. Since the long construction of the box bridge may affect the stability of the existing ballast bed, the protection of the business line during the construction is very important. [0003] At present, the main reinforcement and protection construction schemes for the long construction of box bridges in business lines in China are digging piles with reinforced concrete slab protection, steel sheet pile protection, digging piles plus steel sheet pile protection...

AI Technical Summary

Problems solved by technology

[0004] First, the existing splayed wing walls are all demolished, and the splayed wing walls cannot be effectively used for support, and the splayed wing walls are difficult to disassemble;

[0005] Second, after all the eight-shaped wing walls are removed, powerful protection methods such as digging piles with reinforced concrete slab protection, steel sheet pile protection, digging piles plus steel sheet pile protection, etc. are required, and the amount of protection work is large;

[0006] Third, the complexity of the construction process is increased, the construction period is long, and there are certain safety hazards during the construction of protective measures

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