Prestressed fabricated pavement structure and construction method

Abstract

The invention discloses a prestressed fabricated pavement structure and a construction method, and aims to effectively improve the engineering construction convenience and continuously improve the quality and construction period controllability, the engineering structure durability, the comprehensive cost economy and the transportation and maintenance convenience of a fabricated pavement. According to the pavement structure, prefabricated pavement slabs are paved on an under-slab foundation to form an assembled pavement, each prefabricated pavement slab is of a one-way prestressed reinforced concrete structure, longitudinal U-shaped grooves are formed in the two transverse connecting ends of each prefabricated pavement slab at intervals in the width direction, and transverse U-shaped grooves are formed in the two longitudinal connecting ends of each prefabricated pavement slab at intervals in the width direction; the longitudinal U-shaped grooves and the transverse U-shaped grooves are recessed downwards from the top faces of the prefabricated pavement slabs, and embedded connecting components are arranged in the corresponding transverse U-shaped grooves and the longitudinal U-shaped grooves of every two adjacent prefabricated pavement slabs. The isolation layer, the graded broken stone cement stable layer and the cement sand mixed filling layer are sequentially laid on the surface of the soil base from bottom to top through a dry laying method. Paving is conducted on the cement sand mixed filling layers of the prefabricated pavement slabs, and every two adjacent prefabricated pavement slabs are connected into a whole through a pre-buried connecting component after all the prefabricated pavement slabs are leveled.

Description

technical field [0001] The invention relates to traffic roadbed facilities, in particular to a prestressed assembled pavement structure and construction method for highways and airport tracks. Background technique [0002] Compared with traditional cast-in-place slabs, prefabricated slabs show great advantages in road engineering, as follows: [0003] 1. Rapid opening to traffic: Assembled road slab technology has changed the traditional cement concrete pavement maintenance mode, and solved the contradiction that the strength of cast-in-place cement concrete increases slowly but requires rapid traffic opening; [0004] 2. Reduce environmental impact: Compared with the traditional cast-in-place slab, the prefabricated slab hardly discharges any waste water, waste residue, and noise pollution at the construction site, and has minimal impact on the environment. It is an environmentally friendly and rapid construction method ; [0005] 3. Adapt to special climate: the prefabri...

AI Technical Summary

Problems solved by technology

[0008] 1. Most of the existing prefabricated pavement panels use ordinary reinforced concrete pavement panels without prestressing, and the pavement panels are thicker in size, resulting in low efficiency of large-area transportation and paving, so they are mostly used for urban road maintenance;

[0009] 2. The connection method of the existing prefabricated road panels mainly relies on the tie rods and dowel rods and the concrete poured into the installation slots to form a connected whole. It is difficult to replace during maintenance, and it needs to be re-cut and pre-drilled;

[0010] 3. When the prefabricated road slab is made of ordinary reinforced concrete, its durability is improved, but compared with the traditional road slab, the cost of manufacturing and transportation is higher

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