A pier counterforce closing force system self-balance-type railway cast-in-situ beam static load test apparatus

Abstract

Provided is a pier counterforce closing force system self-balance-type railway cast-in-situ beam static load test apparatus. The invention relates to a railway cast-in-situ simply-supported box girder static load test pier counterforce closing force system self-balance-type loading device. The device comprises main portions such as a counterforce beam, crossbeams, pull bars, bridge pier holt hoop irons and bridge pier holt hoop iron linking beams. The counterforce beam and the bridge pier holt hoop iron linking beams adopt a hinged construction to transmit forces. The linking beams transmit the counterforce to the bridge pier holt hoop irons, and further transmit the counterforce to a bridge pier through a holt hoop iron frictional force. The crossbeams form a force bearing integral body through the pull bars and the counterforce beam. As for the loading device, the jack is used to jack the crossbeams; the counterforce of the jack is loaded on the tested cast-in-situ beam; the counterforce at the two ends of a beam body are transmitted to the bridge pier through a support base; the counterforce is self-balanced at the bridge pier; the loading device is a force system self-balance system; no base load burden is added in a test process; the advantages such as a simple structure, simple and clear force transmission, convenient assembly, allowing turnover and relatively low cost are realized; requirements of railway cast-in-situ beams at different spans and of different beam types for graded loading and unloading can be satisfied; and relatively high applicability is realized.

Description

technical field [0001] The invention relates to a railway cast-in-place beam inspection device, in particular to a railway cast-in-place simply supported beam static load test pier reaction force closing force system self-balancing loading device. Background technique [0002] Railway prestressed concrete simply supported beams include prefabricated beams and cast-in-place beams. Prefabricated beams require static load tests to verify the structural performance of products; and cast-in-place beams have not been widely used for static load tests due to the lack of reasonable loading devices. . At present, the self-balancing reaction force loading device widely used in the static load test of prefabricated beams needs to set the lower beam at the bottom of the beam to transmit the reaction force of the tie rod, which is balanced with the reaction force of the beam body to form a self-balancing system of forces; Due to space constraints, it is basically impossible to install t...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a self-balancing static load test device for cast-in-place railway beams of pier reaction force closing force system, which solves the technical problems of in-situ static load tests for cast-in-place beams

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