Method for extension of existing bridge, involves assembling cantilever brackets to form extension cross-section, removing existing road surface on part of bridge, concreting cross-section, making seal, and building actual road surfaces

摘要

The method involves installing struts between bars (6-9) of a bridge (1) over entire length of the bridge, and casting an external transverse prestressed concrete. Cantilever brackets are assembled to form an extension cross-section. The cantilever brackets are adjusted, and an existing road surface on a part of an existing bridge is removed. The extension cross-section is concreted, and a seal is made. Actual road surfaces (2-5) are built, and existing cantilevers (10, 11) are removed before mounting the cantilever brackets.