Novel prefabricated concrete hollow slab girder and construction process for building roads and bridges by using same

Abstract

The invention discloses a novel prestressed concrete hollow slab beam, comprising a hollow cubic body, two heads. Two ends are integrated with the body and steel bar is pre-buried in it. The head is rabbet solid body. The invention also discloses a construction process for roads and bridges adopting said hollow slab beam. Relative temporary supports are set on the top of capping beam or abutment. The hollow slab beam is set on temporary supports. Fixed supports are set on the top of capping beam or abutment; pre-buried steel bars between adjacent heads and in body are connected; the cast-in-case concrete connecting part and integrated padding block for connecting the body and adjacent heads are cast in scene so that padding block is set on the fixed support in horizon. Said procedures are iterated so that the surface of road and bridge is connected by hollow slab beam. Because special designing slab beam and step pouring technology are adopted in the invention, the demand of prior new criterion is satisfied expediently. At the same time integrity and durability of slab beam are strengthened and the period of design and construction is shortened.

Description

technical field [0001] The invention relates to the field of road and bridge construction, in particular to a prestressed concrete hollow slab girder, and also relates to a construction technique for erecting a road and bridge by using the hollow slab girder. technical background [0002] In the field of construction, hollow-core slab girders are frequently used in bridge and road construction. However, the hollow slab girders in the prior art often suffer from some diseases during the use of bridges and roads, and also include some inconveniences in design and construction, such as: [0003] a. Due to various factors such as the load from the hollow slab beam road, the upper part of the bridge, the penetration and corrosion of bridge deck rainwater, and careless construction, the hinge joints between the hollow slab girders are easy to break after a period of use, forming a single beam. , which accelerates the damage of the bridge structure; [0004] b. As rainwater infil...

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Problems solved by technology

[0009] The technical solution of this utility model can better solve the force balance problem between the support surface and the beam bottom when it is implemented, but since each wedge-shaped backing plate needs to be calculated separately according to the terrain parameters and the calculation is complicated, it obviously increases The workload of design and construction greatly prolongs the design and construction period, and it is difficult to better improve the accuracy of the wedge-shaped backing plate

[0010] At the same time, because the above-mentioned wedge-shaped backing plate and the slab girder constituting the road and bridge deck are designed and constructed separately, after a certain period of use due to factors such as changes in stress conditions, shearing and sliding are easily formed between the two and are damaged, making the road and bridge shortened service life

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