Method for rebuilding simply-supported beam bridge into semi-integral bridge abutment beam

Abstract

The invention relates to a method for rebuilding a simply-supported beam bridge into a semi-integral bridge abutment beam. The method comprises the following steps: (1) measuring and lofting, namely lofting a linear sample parallel to a dilatation joint to two sides of the direction of the dilatation joint between a primary simply-supported beam bridge abutment and a bridge main beam respectively; (2) lancing and grooving, chiseling and cleaning, namely lancing and grooving along the two linear samples, chiseling primary asphalt concrete and integral concrete on a bridge deck among the grooves, and cleaning the wall and the bottom of the grooves; (3) manufacturing and installing a reinforcing mat, namely welding one end of the reinforcing mat and a primary U-shaped reinforcing steel bar of the abutment back, and binding and connecting the other end of the reinforcing mat and the primary paved and reserved reinforcing steel bar of the bridge deck; (4) pouring concrete; and (5) curing. The method efficiently eliminates the hidden safety troubles such as jumping at the bridge head and the like caused by the damage of the dilatation joint of the primary simply-supported beam bridge, nearly does not need to maintain beam bridge after long-term use, is simple to rebuild and construct, has lower invested funds, and has popularization and application values for middle and small simply-supported beam bridges of reinforced concrete.

Description

technical field [0001] The invention relates to highway bridge transformation technology, in particular to a method for transforming a simply supported girder bridge into a semi-integral abutment bridge. Background technique [0002] Among the numerous highway bridges in our country, simply supported girder bridges account for the vast majority. The abutment and main girder of simply supported girder bridges are connected by supports, expansion joints and their devices, and are separated abutments. The long-term use of the separated abutment will inevitably cause damage to the expansion joints and their devices, leading to vehicle jumping at the bridge head and jeopardizing driving safety. However, the maintenance and replacement costs of expansion joints and their devices are relatively high, and the maintenance time is relatively long, and traffic must be interrupted during construction. Even if it is replaced with a new expansion joint device, it will inevitably face th...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a method for transforming a simply supported girder bridge into a semi-integral abutment bridge. The connection method between the abutment of a simply supported beam bridge and the main girder of the bridge makes the abutment back of the abutment directly connected with the main girder of the bridge, forming a semi-integral abutment bridge without expansion joints, so as to solve the problem that there must be expansion joints in the separated abutment inherent disadvantages

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