既有铁路运营条件下拆除旧桥顶进新框构桥施工技术

Jacking Construction of New Frame Bridge and Demolishing Old Bridge over Existing Operational Railway

以拆除既有线梁式桥、顶进新框构桥为例,介绍了拆旧顶新施工中,线路架空、混凝土破除、框桥顶进等施工技术,指出各施工过程中的注意事项,以期把握拆旧顶新施工的技术难点,满足不断变化的施工需要。

Taking demolishing existing girder bridge and jacking new frame bridge as example, the paper introduces the construction technologies such as railway overheading, removal of concrete, and frame bridge jacking and points out the precautions in respective construction so as to solve the technical difficulties in the demolishing of the old and the jacking of the new so as to meet the changing construction needs.