Construction method for longitudinally and flexibly splicing newly-built bridge and current bridge

Abstract

The invention belongs to the technical field of road bridge construction and relates to a construction method for longitudinally and flexibly splicing a newly-built bridge and a current bridge. The construction method comprises the steps of re-measurement and checking, horizontal and vertical current bridge cutting, asphalt laying, splicing construction, slot bottom processing, waterproof treatment, GD elastic concrete paving and casting, rolling compaction and surface treatment. The construction method has the advantages that normal use of a prestressing system and the integrity of splicing joint structure size of the current bridge are ensured; sudden change of elevation difference is eliminated, the running comfort is improved, and the noise volume of each vehicle passing through splicing joints is reduced; rainwater infiltration is effectively prevented, and the structure durability is improved; the surface roughness of GD elastic concrete is improved; small construction operation surface and uninterrupted traffic can be achieved, the method is easy and quick, a splicing effect is good, the operation and maintenance costs are low, a construction period is short, and opening to traffic can be achieved after 2 hours after construction is completed; the operation is simple, and repair is convenient.

Description

technical field [0001] The invention belongs to the technical field of road and bridge construction, and relates to a construction method for longitudinally flexible splicing of newly-built bridges and existing bridges. Background technique [0002] The conventional new status quo bridge longitudinal joint forms are as follows: [0003] (1) Flexible connection [0004] 1) There is no special treatment between bridges in the new status quo, and gaps are reserved directly, and joints are filled with asphalt. [0005] 2) The bridge structure of the new status quo is disconnected, and the bridge deck is connected by telescopic devices. [0006] 3) In the new status quo, the main structure of the bridge is disconnected, and the bridge deck is connected by elastic materials. [0007] Disadvantages: The splicing joints are prone to sudden changes in height difference, which affects traffic safety; the splicing joints are prone to water seepage, causing the bridge structure to be...

AI Technical Summary

Problems solved by technology

[0007] Disadvantages: The splicing joints are easy to form a sudden change in height difference, which affects traffic safety; the splicing joints are prone to water seepage, causing the bridge structure to be corroded by rainwater and affecting the durability of the structure

[0022] Disadvantages: Due to the different settlement of the bridge in the new status quo, the additional internal force generated will cause cracks in the upper connection position, and then damage the expansion joints

[0025] Disadvantages: The settlement difference exceeds the allowable range. In the light case, the bridge deck will be damaged and cracked in a large area. In the severe case, one side of the seam will be broken, which will affect the structural safety. The live load will cause excessive deformation and cause structural damage. The later maintenance will have a great impact on traffic. Long construction period and troublesome maintenance

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