A kind of seamless bridge expansion joint based on phosphorus and magnesium material and its construction method

Abstract

The invention discloses a seamless bridge expansion joint based on a phosphorus-magnesium material. The seamless bridge expansion joint comprises a pavement layer and a cast-in-place concrete layer, wherein a phosphorus-magnesium material interface layer, a thin steel plate, transverse rebar and vertical rebar are arranged between the pavement layer and the cast-in-place concrete layer, the transverse rebar and the vertical rebar are arranged at the inner side of the phosphorus-magnesium material interface layer, the thin steel plate is arranged on a crack crevice of the cast-in-place concretelayer, and the gaps among the transverse rebar, the pavement layer, the phosphorus-magnesium material interface layer, the cast-in-place concrete layer and the thin steel plate are filled with a phosphorus magnesium mortar layer. The invention further discloses a construction method of the seamless bridge expansion joint based on the phosphorus-magnesium material. The seamless bridge expansion joint based on the phosphorus-magnesium material has the advantages that the flexibility is good, the high-temperature stability is high, the low-temperature crack resistance is excellent, the construction is simple, the commissioning time is short, the early strength is high, the repair and maintenance are simple, the durability is strong, the water resistance and adhesion are strong, the operationand running are comfortable and steady, the service life is long, the bridge expansion joint is simple and compact, a mounting notch is shallow, an anchoring system is not needed, the combination with the ground face is tight, flat and smooth, and the bridge expansion joint is suitable for the installation or repair and maintenance various bridge expansion joints.

Description

technical field [0001] The invention belongs to the technical field of road and bridge engineering, and in particular relates to a seamless bridge expansion joint based on phosphorus and magnesium materials and a construction method thereof. Background technique [0002] Bridge expansion joints: refers to the expansion joints usually set between two girder ends, between the girder end and abutment or at the hinged position of the bridge in order to meet the deformation requirements of the bridge deck. It is required that the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the bridge axis, and are firm and reliable. The vehicles should run smoothly without sudden jumps and noises; they should be able to prevent rainwater and garbage from infiltrating and blocking; installation, inspection, and maintenance , Elimination of dirt should be simple and convenient. Where expansion joints are set, railings and bridge deck pavement ...

AI Technical Summary

Problems solved by technology

However, there is no relevant literature report on the application of magnesium phosphate cement on bridge expansion joints.

In order to solve the problem of insufficient high-temperature stability, poor low-temperature crack resistance, complicated construction, long commissioning time, difficult maintenance, low early strength, poor durability, poor waterproofness and adhesion, and poor operation and driving in current bridge expansion joints, the inventors Uncomfortable and stable, low service life and other problems, further research on magnesium phosphate cement

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