An External Prestressed Reinforcement Device of Type 64 Railway Military Beam

Abstract

The invention relates to an external prestressed reinforcing device for a six-four type railway military beam, which includes a triangular bracket, a connecting body and a prestressed cable; Rod connection; prestressed cables include double-ear anchor ends, tension ends and steel strands; connectors include top plates and bottom plates; tension bolts and single ears A are fixedly installed on the top surface of the top plate; tension ends and tension ends The bolts are fixedly connected, and the anchor ends of the double ears are connected with the corresponding upper and lower triangular brackets; the present invention installs the connecting body and the triangular bracket on the upper chord of the six-four beam, and installs the prestressed cable between the connecting body and the triangular bracket, so that Each node of the upper chord is prestressed vertically upward to offset the vertical unfavorable load caused by the self-weight of the six-four beam and the passing of the train, thereby reducing the deflection of the six-four beam and improving the force condition of the vertical bar and other members .

Description

technical field [0001] The invention relates to an external prestressed reinforcing device for a six-four type railway military beam, belonging to the technical field of construction engineering. Background technique [0002] Six-four type railway military beam, as a kind of railway emergency repair steel beam, is the main beam type used for bridge repair after bridge damage caused by natural disasters or sudden wars in our country. However, there are the following problems in its actual use: 1. Six-four The beam is an assembled structure, and the components are connected by pins and bolts. Due to the existence of pin-hole gaps, the vertical deflection of the six-four beam is relatively large; 2. Among the basic members of the six-four beam, the standard triangular or end frame The bearing capacity of the vertical bar is weak, and it may yield in compression under the action of the live load of the train; 3. The six-four beam is a multi-piece structure, and the weak transver...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of insufficient load-bearing capacity and rigidity of the current 64-type railway military beam, and provide a kind of vertical upward prestress applied to each node of the upper chord, so as to offset the weight of the 64-type beam and the train passing. The external prestressed reinforcement device of the six-four type railway military beam, which reduces the deflection of the six-four beam and improves the stress condition of the vertical bar and other rods

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