Fabricated bridge deck slab construction method through combination matching of long and short lines and precast segments

Abstract

The invention discloses a fabricated bridge deck slab construction method through combination matching of long and short lines and precast segments. The method has the characteristics that single internode bridge deck slabs are matched and prefabricated through a long line method, and different internode bridge deck slabs are matched and prefabricated through a short line method. The method includes the three steps of framework configuration, standard internode bridge deck slab prefabrication and special-shaped internode bridge deck slab prefabrication. The method has the advantages of high prefabrication efficiency, easy control of precision, adaptability to horizontal curves and vertical curves, framework recycling, and good economic and social benefits.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method for a prefabricated segment-assembled bridge deck with long and short lines combined and matched. Background technique [0002] Most of the existing steel truss bridge decks are steel bridge decks or reinforced concrete bridge decks. The steel bridge deck generally adopts the construction method of block installation and on-site welding. The disadvantages are: 1. The amount of steel used is large; 2. The workload of on-site welding is large; The overall stress system. Reinforced concrete structure bridge deck generally adopts prefabrication in sections and blocks, and the construction method of cast-in-place concrete wet joints. The disadvantages are: 1. There are many cast-in-place joints, and the workload on site is large; 2. It is not suitable for continuous beam negative moment areas. [0003] With the development of bridge design and construction tech...

AI Technical Summary

Problems solved by technology

The steel bridge deck generally adopts the construction method of block installation and on-site welding. The disadvantages are: 1. The amount of steel used is large; overall stress system

Reinforced concrete structure bridge deck generally adopts prefabrication in sections and blocks, and the construction method of cast-in-place concrete wet joints. The disadvantages are: 1. There are many cast-in-place joints, and the on-site workload is large; 2. It is not suitable for continuous beam negative moment areas

The long-line prefabrication method has the following disadvantages: 1. The shape of each span must be consistent, and it is not suitable for bridges with horizontal curves; 2. The utilization rate of the bottom form is low; 3. The investment in the construction of the bottom form pedestal is large and cannot be used for the next similar project ; 4. The foundation of the bottom mold pedestal must not have a large settlement, and the foundation must be very firm; 4. The steel bar binding occupies a long period of segmental prefabrication

But its disadvantages are: 1. The prefabrication accuracy is not suitable for control, and high-precision instruments are needed for linear measurement, high-precision linear control equipment is required, and the requirements for on-site construction control are high; 2. The prefabrication period is relatively long

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