Bridge construction method

Abstract

The invention discloses a bridge construction method. The bridge construction method comprises steps as follows: concrete foundations are constructed on foundations at two ends of a bridge respectively; prefabricated mounting seats are embedded in the concrete foundations; two ends of a beam-column type support are fixed on the two mounting seats through welding, a bridge superstructure is formed through binding, and a mold of the bridge is mounted and fixed on the bridge superstructure and formed through high-strength concrete pouring; a concrete slide is poured on the beam-column type support and transversely extends to communicate with pouring positions of all transversely adjacent bridge sections, and a pouring trolley is placed in the concrete slide; mixing of a concrete pouring material is finished, bridge pouring is performed, and the concrete pouring material and the beam-column type support are poured together; a support lowering device is dismounted after setting of concrete. With the adoption of the method, the construction efficiency is improved, the self-made high-strength, anti-crack and anti-permeability concrete is adopted, so that the firmness, stability and corrosion resistance of a bridge body are greatly improved, and the service life of the bridge body is prolonged.

Description

technical field [0001] The invention relates to a building construction method, in particular to a bridge construction method. Background technique [0002] At present, bridge construction is the most important thing in the construction of expressways, high-speed railways and urban viaducts. In bridge construction, no matter what type of bridge, there are only two ways to construct the bridge superstructure (bridge slab): one is prefabricated installation construction , and the other is cast-in-place construction. There are two ways to fix the outer formwork for forming the bridge slab in the cast-in-place: one is to use the full hall bracket for support, and the other is to use the hanging basket for suspension. [0003] Prefabricated installation construction is to decompose the bridge slab into units and make them in factories or prefabrication yards, and then transport the units that make up the bridge slab to the location of the bridge and install them on the piers. T...

AI Technical Summary

Problems solved by technology

The disadvantages are: the construction of the joints of the unit bodies constituting the bridge deck is troublesome, the connection strength of the joints between the unit bodies constituting the bridge deck is poor, leaving hidden dangers; the construction equipment requires high requirements, and bridges with large spans are not suitable for use; The construction from the beam to the bridge deck is completed, and the construction period is long; the site required for the prefabricated bridge deck unit is large

The disadvantages are: the passage or navigation under the bridge must be closed, which will cause obstacles to local traffic and economic development; the requirements for the terrain conditions under the bridge are relatively high, and the cost of bent-bench base treatment and bent-frame preloading is quite high; the sinking of the bent frame will cause quality problems. ACCIDENT

The disadvantages are: the construction requirements are high, and the safety of the cantilever construction is relatively small; the construction length of each unit is limited, there are many construction units per span, and the amount of work for each unit is not large, but there are many construction procedures for each unit. It takes a long time to put the hanging basket in place, set up the formwork, bind the steel bars, pour concrete, maintain the concrete, demould, apply prestress, seal the anchor, and drop the frame, so the construction period is long and the progress is very slow; It is difficult to control the precision of the construction project, and when the closing error is large, it will affect the force of the bridge; the project cost is high

[0006] To sum up, the existing bridge construction methods cannot meet the requirements of not only maintaining the navigation requirements under the bridge, but also ensuring the integrity of the bridge deck, high construction accuracy and fast construction progress.

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