A bridge combined construction method

Abstract

The invention discloses a bridge combination type construction method. The construction method includes the following steps that S1, prefabricated members are manufactured, wherein the prefabricated members of bases and a bridge board are manufactured; S2, the prefabricated members are installed, wherein the bases are fixed to the preset positions, and the bridge board is lifted to the two adjacent bases; and S3, concrete is poured, wherein the concrete is poured into grooves in the two sides of the ends of the bridge board, concrete blocks with the volume ranging from 1000 cubic centimeters to 15000 cubic centimeters are added to the grooves while the concrete is poured, first concrete layers are formed in the grooves, multiple steel reinforcement cages are evenly placed on the upper sides of the first concrete layers, and the concrete is continuously poured to the upper sides of the first concrete layers to form second concrete layers. The sum of the volume of the concrete in all the steel reinforcement cages is 50% to 80% of the volume of the second concrete layers. By the adoption of the method, a prefabricating installation and cast-in-place combination method is adopted, a construction period is shortened, cost is low, and the strength of a bridge is high.

Description

technical field [0001] The invention discloses a bridge construction method, and in particular discloses a bridge combined construction method. Background technique [0002] Bridge construction methods, one is prefabricated installation construction, and the other is on-site pouring 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, bridge piers and bridge slabs can be constructed in parallel, and the construction period is relatively short; the bridge construction process has little impact on the traffic under the bridge. 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; 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 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: high construction requirements, low safety factor for cantilever construction; 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

It can be seen that the existing bridge construction methods are difficult to combine prefabricated installation and on-site pouring at the same time, the construction method is single, and the cost is high

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