Beam-removing rib-increasing strengthening construction technology of highway bridge

Abstract

The invention discloses a beam-removing rib-increasing strengthening construction technology of a highway bridge. A bearing beam of a strengthened bridge comprises a plurality of hollow beam plates. The technology comprises the following steps: chiseling and removing an original collision prevention guardrail and a bridge face laying layer; eliminating a transverse connection hinge seam between the two adjacent hollow beam plates; hanging and moving the hollow beam plates and supporting reasonably; embedding ribs and pouring the pad stone of a supporting seat anew; checking, determining, recycling the hollow beam plates, repairing defects and processing cracks; sticking the beam bottoms of edge beams and strengthening steel plates; anew installing the hollow beam plates transversely at intervals; constructing rib beams which are added newly; constructing a steel bar net of the bridge face laying layer and embedding the steel bar of the collision prevention guardrail in advance; pouringthe concrete of the bridge face laying layer; and constructing the collision prevention guardrail and installing bridge face expansion joints. The invention has reasonable design, smaller execution difficulty, simple construction steps and low construction cost, has small damage to the original hollow beam plates, can enhance the bearing capacity of an original structure of a hollow plate bridge,has very good strengthening effect and can effectively solve the strengthening problem of the hollow plate bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge reinforcement construction, and in particular relates to a reinforcement construction technology for highway bridges by removing beams and adding ribs. Background technique [0002] In the past 20 years, although my country has started research on the reinforcement and reconstruction technology of old bridges, and the transportation departments in various places have reinforced and reconstructed a large number of old dangerous bridges, due to the large number of old dangerous bridges and the fact that bridges built after the 1980s have The increase in the operating life has also gradually entered the maintenance period, and defects and diseases have begun to appear and develop, especially the increasing number of large and heavy vehicles, and more and more over-limit and overloaded vehicles. The bridge has entered the ranks of repair, maintenance and reinforcement. For bridges that cannot adapt to m...

AI Technical Summary

Problems solved by technology

The bridge deck thickening method can only improve the mechanical performance of the damaged structure and restore its bearing capacity level

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