Construction method for assembling integral hollow slab bridge

Abstract

The invention discloses a construction method for assembling an integral hollow slab bridge, which comprises the following steps of: prefabricating a hollow slab, processing the side of the hollow slab into a linear edge, arranging three diaphragm plates at the two ends and the mid-span position of the hollow slab, forming transverse prestressed pore ducts inside the diaphragm plates by a pipeline pre-burying method, and pouring hollow slab concrete; hoisting the hollow slab, and ensuring that the transverse prestressed pore ducts of the diaphragm plates of each hollow slab correspond one to one; and applying an external transverse pre-stressing force, making transverse prestressed steel bars or prestressed ropes with sheaths pass through the transverse prestressed pore ducts of the diaphragm plates of each hollow slab, and drawing the transverse prestressed steel bars or the prestressed ropes so that the side plates of the adjacent hollow slabs are tightly contacted and mutually jacked. When the transverse prestressed steel bars are adopted, cement paste is poured into the transverse prestressed pore ducts of each hollow slab; and when the prestressed ropes with sheaths are adopted, the pouring the cement paste is not needed. The method has convenient construction, and greatly improves the transverse integrity of the hollow slabs along the bridge.

Description

technical field [0001] The invention relates to a construction method for assembling an integral hollow slab bridge. Background technique [0002] At present, small and medium-span highway bridges with a single-span span of less than 20m usually adopt the structural form of prestressed concrete or reinforced concrete assembled hollow slab bridges. The hollow slab of this type of bridge is constructed in a prefabricated factory. The cross-section is usually in the form of a single-hole or double-hole cross-section. The pre-tensioning method is used to install prestressed steel bars along the longitudinal direction of the slab. The construction method is to hoist the prefabricated hollow slabs in place first, then pour concrete at the position of the grooved joints between adjacent hollow slabs, and connect the hollow slabs horizontally along the bridge to form a whole through the grooved steel bars and concrete. . Since adjacent hollow slabs are only connected by rebar and ...

AI Technical Summary

Problems solved by technology

Since adjacent hollow slabs are only connected by rebar and concrete with rebate joints, the ability to transmit shear force is limited, and the transverse integrity along the bridge is poor, and cracks along the longitudinal direction of the bridge are prone to appear at the position of rebate joints, resulting in bumpy driving, thus affecting The normal use and durability of the bridge, when the situation is serious, the veneer will be stressed, burying hidden dangers to the safety of the bridge

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