External prestressing reinforcement device of railway military beam 64

Abstract

The invention relates to an external prestressing reinforcement device of a railway military beam 64. The external prestressing reinforcement device comprises a triangular support, connecting bodies and prestressed cables; the triangular support comprises an upstream triangular support body and a downstream support body which are connected through transverse horizontal rods; the prestressed cablescomprise double-lug anchoring ends, tensioning ends and steel strands; the connecting bodies comprise top plates and bottom plates; tensioning bolts and single lugs A are fixedly installed on the topfaces of the top plates; the tensioning ends are fixedly connected with the tensioning bolts, and the double-lug anchoring ends are connected with the upstream triangular support body and the downstream triangular support body correspondingly. By installing the connecting bodies and the triangular supports on upper chords of the beam 64 and installing the prestressed cables between the connectingbodies and the triangular supports, all joints of the upper chords are prestressed vertically and upwards to compensate for the dead load of the beam 64 and a vertical unfavorable load generated by passage of a train, therefore, down warping of the beam 64 is reduced, and the stress states of vertical rods and other rod parts are improved.

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 of

Images