Construction Key Of Reinforcing Method Of Bailey Bridge

The basic purpose of the reinforcement scheme of Bailey Bridge is to improve the quality of the reinforcement project. There are different construction methods and quality assessment standards for different reinforcement schemes.

According to the technical specification for strengthening concrete structure in the reinforcement method of several typical, in accordance with the construction experience, different reinforcement methods in the construction attention point is different:

1 Prestressed reinforcement method

When this method is strengthened by prestressed tie Rod, the tie rod must be straightened and adjusted before installation, and the size and installation position of the tie rod must be accurate.Before tension, the quality of welded joints, screws and nuts should be inspected, and attention should be paid to the quality inspection of the embedded depth force transmission weld between the Angle steel at the end of the pole and its plate and the concrete member.After passing the inspection, both ends of the pole shall be temporarily fixed with screw bolts, and then filled with epoxy mortar or high-strength cement mortar. The reinforced pressure rod limbs, connecting plates, fixing plates and tension bolts shall be coated with anti-rust paint for anticorrosion.

2 Outsourcing Steel Reinforcement

The key of this processing is the surface treatment, including the reinforcement of the joint surface and the steel plate bonding surface.For dry reinforcement construction, in order to make the angle steel can be close to the surface of the component, the concrete surface must be polished smooth, without debris and dust.When wet reinforcement construction is used, the surface of Angle steel and concrete should be coated with latex cement slurry or prepared with epoxy chemical grouting material.Then the steel plate for rust removal, concrete dust removal and acetone or xylene cleaning steel plate and concrete surface, bonding grouting.

3 External steel-bonded reinforcement method for concrete members

This method of construction is relatively simple, the first need to pay attention to the concrete and steel surface treatment.For the old and dirty serious concrete component adhesive surface, clear to dust, then wipe the surface with acetone.Steel plate surface treatment should be based on its corrosion, available sandblasting, sandpaper, grinding wheel machine, so that the steel plate appears metallic luster.The grinding lines on the steel surface should be perpendicular to the force direction as far as possible, and then be wiped clean with acetone.Secondly, we should pay attention to the choice of adhesives. At present, the building structure adhesives on the market are mixed, and the choice of adhesives must be cautious.Third, we should pay attention to the details in the process of dispensing and pasting. Adhesive should be made up in strict accordance with the specification requirements of the proportion, especially to master the dosage of curing agent, mixing to uniform, at the same time to ensure that the paste surface full, dense.Finally, it should be noted that there should be no disturbance to the plate during the curing stage.

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