A prefabricated composite reinforced concrete arch culvert

Abstract

The invention discloses a prefabricated superposed reinforced concrete arch culvert, which comprises a cast-in-place reinforced concrete foundation 1, prefabricated inverted-T shaped wallboards 2, a prefabricated cover plate 3 with bracket legs, a prefabricated arch plate 4, an inner post-cast reinforced concrete bottom plate 5, outer post-cast reinforced concrete side bars 6 and post-cast reinforced concrete triangular bars 7. The prefabricated cover plate 3 with bracket legs is provided with lower bracket legs 8 and upper bracket legs 9. A whole arch ring is non-sensitive to subgrade and foundation settlement difference and resistant to cracking, the lateral sides of the arch ring are vertical in fabrication, the cover plate is horizontal in fabrication, and the wallboards are horizontal in fabrication. The prefabricated superposed reinforced concrete arch culvert is safe and convenient in construction, fast in speed, high in quality, high in durability, wide in application and satisfactorily functional.

Description

technical field [0001] The invention relates to a culvert, in particular to an arch culvert of an underpass structure under high fill or deep subgrade. Background technique [0002] At present, arch culvert construction is completed by pouring concrete on site, or building masonry on site. These methods have inherent defects in design and construction, resulting in poor quality arch culverts, slow progress, more maintenance, and high costs. The specific performance is: the arch culvert is the underpass structure of the high-fill embankment, and it must be located in a relatively low-lying valley or valley. The terrain and landform of these positions are poor, and the geological conditions are generally poor and uneven. (Except for end-bearing piles), under the heavy load of high fill, the settlement and uneven settlement of the foundation are inevitable. These uneven settlements exist during subgrade construction or for a long period of time after construction, and some of...

AI Technical Summary

Problems solved by technology

However, the actual situation is that uneven foundation settlement caused by uneven geology and poor construction conditions on site is inevitable and difficult to predict.

This results in a design that fails to take into account these adverse settlement differences, thereby failing to ensure that the arch culverts will not develop cracks

There are some inherent quality defects in the construction of cast-in-place reinforced concrete arch rings, such as: during the on-site pouring of the arch ring concrete, the concrete is unfavorable to vibrate on an arched surface, the cement slurry is easy to flow, and the water-cement ratio of the concrete is not good on the arch ring. Uniformity, resulting in uneven concrete strength of the arch ring, many construction joints, failure to form a whole, poor appearance quality, etc.

In the construction of stone masonry arch rings, there are also some congenital defects, such as: the strength, size, shape, assembly method of stone materials, the quality of mortar and the fullness of joints, etc., which are difficult to control. These defects affect the strength of masonry.

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