Structure and Construction Method of Penetrating Abutment Slab

Abstract

The invention discloses a connective bridging slab structure comprising a bridge abutment and a butt slab, wherein one end of the butt slab is fixedly anchored with the bridge abutment through steel bars extending outside the bridge abutment top, and the other end is jointed on the roadbed. The invention also discloses a connective bridging slab structure construction method comprising the following steps: 1, determining the areas of the steel bars extending outside the bridge abutment top: assuming the butt slab is rigid and the most outside steel bars extending outside the bridge abutment top reach yielding, actual measuring modulus deformation of the compressed roadbed soil body, determining the soil body maximum strain, and obtaining the areas of the steel bars extending outside the bridge abutment top through moment balance and obtaining the bridge abutment top distribution areas; 3, casting the bridge abutment and the butt slab, and connecting the butt slab with the bridge abutment: casting the bridge abutment, placing a butt slab steel bar net frame on the bridge abutment top when the bridge abutment concrete reaches the required intensity, welding or binding the steel bars extending outside the bridge abutment top with the butt slab steel bar net frame, fixing the butt slab steel bar net frame on the bridge abutment top, connecting the butt slab with the bridge abutment top, and casting butt slab concrete.

Description

technical field [0001] The invention belongs to the technical field of highway and bridge engineering, and relates to a through-type abutment lapping plate structure and a construction method thereof. Background technique [0002] Nowadays, the slabs in the transitional sections of bridges and roads are generally firstly reinforced according to the construction drawings, and after the concrete is poured into shape, one end of the slab is placed on the corbel on the back of the platform, and a telescopic structure is set between the end of the slab and the back of the platform. seam while placing the other end of the board on the compacted roadbed. [0003] The main disadvantage of this slab-lapping technology is that due to the existence of the platform back corbel, the soil near and below the corbel cannot be effectively compacted during the compaction process of the subgrade by the compactor, resulting in this Part of the soil subsides under the action of its own weight a...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantage of this slab-lapping technology is that due to the existence of the platform back corbel, the soil near and below the corbel cannot be effectively compacted during the compaction process of the subgrade by the compactor, resulting in this Part of the soil subsides under the action of its own weight and consolidation, resulting in an increase in the void volume of the slab and further aggravating the fracture of the slab; secondly, the rainwater on the road surface in the transition section is easy to pass through the gap between the end of the slab and the back of the platform. Expansion joints in between penetrate into the soil, increasing the consolidation and settlement of the soil near the corbel, increasing the voidage of the slab, and making the slab more likely to break

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