METHOD FOR BEAM BRIDGE RECONSTRUCTION (VARIANTS) Russian patent published in 2006 - IPC E01D22/00 

FIELD: bridge building, particularly bridge reconstruction.

SUBSTANCE: method according to the first embodiment involves erecting additional support members in proximal vicinity to existent bridge pier; demounting beam span structure during traffic interruption period; mounting new span structure supported by additional support members. The additional support members are made as posts constructed from both span structure sides out of the bounds of the existent bridge. After that composite or monolithic girth rail is erected on the post and cabinet-type blocks are installed upon the girth rail. Cabinet-type block wings abut the piers. Newly-built short span structures are mounted so that the span structures rest upon the girth rails. Method according to the second embodiment involves removing embankment ground outside bridge piers and erecting posts with composite or monolithic girth rails out of the width of the existent bridge; removing span structures; disassembling the existent piers and installing cabinet-type blocks on the girth rails; erecting new elongated span structures supported by girth rails of the posts. Method according to the third embodiment involves forming additional support members made as posts erected from span structure side out of the bounds of existent bridge; mounting composite or monolithic girth rail on each post; mounting new span structures having lengths equal to that of demounted ones and supported by the posts, wherein cantilevered parts of the span structures abut walls of existent piers by ends thereof.

EFFECT: increased technological effectiveness and reduced time of bridge reconstruction.

6 cl, 8 dwg