Prefabricated hollow slab bridge and its construction method

Abstract

The invention discloses an assembly type hollow slab bridge and a construction method thereof. The assembly type hollow slab bridge comprises hollow slabs which are transversely and continuously arranged in sequence; two adjacent hollow slabs are connected together through joist steel; two opposite longitudinal side edges of two adjacent hollow slabs are clamped into notches in both sides of the joist steel respectively; the longitudinal side edges of the hollow slabs are straight edges; the longitudinal-extending side faces of the hollow slabs are straight faces. The construction method of the assembly type hollow slab bridge is a construction method for realizing the hollow slab bridge. By adopting the assembly type hollow slab bridge and the construction method thereof, the transverse integrity of the hollow slab bridge can be enhanced, and the shear transfer capacity among the hollow slabs is increased.

Description

technical field [0001] The invention relates to an assembled hollow slab bridge and a construction method thereof. Background technique [0002] Prefabricated hollow slab bridges have been widely used in highway construction, especially in small and medium highway bridges with a span of 20m or less. This type of bridge has the characteristics of reliable quality, convenient and fast construction. The construction method is to hoist the prefabricated hollow slabs in place, then pour concrete at the position of the grooved joints between adjacent hollow slabs, pave the bridge deck, and connect each block through the grooved joint steel bars and concrete and bridge deck pavement. The hollow slabs are connected transversely along the bridge to form a whole. The hollow slabs of this type of bridge are constructed in prefabrication plants. The cross-section is usually in the form of single or double holes. The pretensioning method is used for construction. Prestressed tendons are...

AI Technical Summary

Problems solved by technology

[0003] This kind of prefabricated hollow slab bridge with grooved joints is only connected and transmitted by steel bars and concrete with grooved joints and bridge deck pavement between adjacent hollow slabs, so the connection capacity between hollow slabs is insufficient, and the integrity of the bridge is poor

Moreover, the size of the grooved joint is generally relatively small, the construction is difficult, and the quality is not easy to be guaranteed, resulting in low concrete strength and easy damage of the grooved joint, resulting in shear failure of the grooved joint. Cracking, forming single-board stress, increasing the deflection of the hollow slab, causing cracks to appear on the bridge deck along the longitudinal direction of the bridge at the position of the tongue and groove, destroying the pavement layer of the bridge deck, causing bumpy driving, thus affecting the normal use and durability of the bridge Sexuality, laying hidden dangers to bridge traffic safety

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